bluuebunny/crossref_metadata_2025 huggingface dataset:
INFLUENCE OF RICE BASED CROPPING SYSTEMS ON SOIL HEALTH IN CAUVERY DELTA ZONE OF TAMIL NADU
Authors:   Soil and Water Management Research Institute,Tamil Nadu Agricultural University, Kattuthottam 613 501, B CHANDRASEKHARAN , S SANKARAN ,   Soil and Water Management Research Institute,Tamil Nadu Agricultural University, Kattuthottam 613 501
Published: July 2023

Field experiments were conducted in low lands at Tamil Nadu Rice Research Institute, Aduthurai, Tamil Nadu for two years (1985-87) to study the change in soil nutrient status due to the rice based cropping systems in Cauvery delta zone. The inclusion of legume in the cropping systems resulted in higher soil nitrogen (+95.2 kg ha¹) and higher phosphorus uptake (13.4 per cent increase). As that of legume, cotton in the systems too resulted in higher soil available nitrogen ( +117.1 kg ha) which might be because of lesser uptake by cotton crop or higher addition of residues by cotton or both. The systems rice-rice-cotton andrice-cotton-cotton second flush possessing cotton as components crop found to leave more phosphorus into the soil because of mining/pumping of phosphorus from deeper soil zone with its deep root system. The systems involving pulses left higher potassium in the soil because of comparatively lesser uptake of potassium by these component crops.
ZINC AND MOLYBDENUM ON YIELD AND NUTRITION OF SOYBEAN
Authors:   Forest College and Research Institute,Tamilnadu Agricultural University,Mettupalayam 641 301, R DEVARAJAN , SP PALANIAPPAN ,   Forest College and Research Institute,Tamilnadu Agricultural University,Mettupalayam 641 301
Published: July 2023

Soybean Co.I. raised on Perianaickanpalayam (Typic ustivertept) and Irugur (Typic ustorthent) soil series at Tamil Nadu Agricultural University Farm, Coimbatore during rabi 1990-91 and kharif 1991-92 respectively responded significantly to Zn fertilizetion at 5.0 kg ha". Combined application of Zn, Mo and FYM at 2.5 kg, 0.5 kg and 10t ha' respectively produced the highest seed yield in both the years besides increasing their content and uptake by soybean seed. The highest Fe uptake by seed during rabi 1990-91 was evidenced with the application of 5.0 kg Zn ha".
INFILTRATION RATE, HYDRAULIC CONDUCTIVITY AND MOISTURE RETENTION CHARACTERISTICS OF SOME SOILS OF LOWER BHAVANI PROJECT COMMAND AREA, TAMIL NADU
Authors:   Dept.of Soil Science and Agrl,Chemistry , Agricultual College and Research Institute,Tamil Nadu Agricultural University Coimbatore  641 003, P PARAMASIVAM
Published: July 2023

Five typical soil profiles under Lower Bhavani Project Command area, representing various physiographic situations were the materials for this study. Soil texture, pH. Electrical conductivity and organic carbon content etc. were influenced by physiographic units. The infiltration rate and hydraulic conductivity were high in Lithic Haplustalf and low in Typic Haplustalf and Typic Chromustert (Black clay loam soil). The study of moist.me retension at variation tension indicated that upper terraced to middle terraced soils (Lithic Haplustalf, Typic Ustochrept, Typic Ustifluvent, Typic Haplustalf) are having low available water content compared to lower physiography Typic Chromustert.
FERTILISER APPLICATION TO GROUNDNUT BASED ON SOIL TEST CROP RESPONSE EQUATIONS
Authors:   Regional Research Station,Tamil Nadu Agricultural University,Vridhachalam  606 001 Tamil Nadu, S LOGANATHAN , J HELKIAH ,   Regional Research Station,Tamil Nadu Agricultural University,Vridhachalam  606 001 Tamil Nadu, S THANGA VELU ,   Regional Research Station,Tamil Nadu Agricultural University,Vridhachalam  606 001 Tamil Nadu
Published: July 2023

Soil test crop response studies were conducted in red lateritic soil of the Regional Research Station, Vridhachalam. Fertility gradients were created and different levels of NPK were applied. VRI I groundnut was raised as test crop. Based on yield of pod and haulm, available nutrient contents in soil at harvest stage and uptake of principal plant nutrient elements crop response equations were developed. Test verification of these equations for their applicability revealed that these fertiliser prescription equations hold good at lower levels of targeted yield upto 20 q/ha beyond which there is deminished response to the applied nutrients.
INFLUENCE OF DIFFERENT HOSTS ON THE ADULTS OF Trichogramma chilonis
Authors:   Department of Agricultural Entomology, Agricultural College and Research Institute, Tamil Nadu Agrl University,Coimbatore 641 003, SELVARAJ AKILA , P.C SUNDARA BABU ,   Department of Agricultural Entomology, Agricultural College and Research Institute, Tamil Nadu Agrl University,Coimbatore 641 003
Published: July 2023

The influence of different hosts on the biology of adults of Trichogramma chilonis (Ishii) was tested in the laboratory. T.chilonis showed highest preference for the eggs of Pthorimoea operculella as shown by highest parasitisation (76.2%), adult emergence (96.33%) females (55.31%) and longevity (6.4 days).
DEVELOPMENT AND TESTING OF DC MOTOR OPERATED KNAPSACK SPRAYERS
Authors:   College of Agricultural Engeering,Tamil Nadu Agricultural University Coimbatore 641003, A TAJUDDIN
Published: July 2023

Three types of knapsack direct-current motor operated sprayers working on the principles if hydraulic, pneumatic and centrifugal atomization respectively were developed and a study was carried out to compare the performance of the three sprayers in terms of spray distribution pattern and stomization characteristics. Among the three sprayers evaluated, centrifugal sprayer performed better with more uniform spray distribution and minimum energy expenditure over the other two sprayers.
EFFECT OF SOIL MOISTURE CONSERVATION TECHNIQUES AND LEVELS OF IRRIGATION ON SOIL MOISTURE RETENTION AND YIELD OF ORIENTAL PICKLING MELON
Authors:   College of Horticulture Kerala Agricultural University Vellanikara,Trichur 680 654, R VEERAPUTHIRAN , P.A JOSEPH ,   College of Horticulture Kerala Agricultural University Vellanikara,Trichur 680 654, P VIKRAMAN NAIR ,   College of Horticulture Kerala Agricultural University Vellanikara,Trichur 680 654College of Horticulture Kerala Agricultural University Vellanikara,Trichur 680 654, U JAIKUMARAN ,   College of Horticulture Kerala Agricultural University Vellanikara,Trichur 680 654, V.K.G UNNITHAN ,   College of Horticulture Kerala Agricultural University Vellanikara,Trichur 680 654
Published: July 2023

A field experiment was conducted in the summer rice fallows at the Agricultural Research Station, Mannuthy, Kerala, during 1996 to study the effect of moisture conservation techniques and levels of irrigation on the soil moisture retention and yield of oriental pickling melon. The study revealed that incorporation of coir pith, saw dust and paddy waste increased the soil moisture content over control 10.9, 1.6 and 7.1 per cent and field WUE by 9.9, 5.3 and 19.9 per cent respectively. Consumptive use was also increased by the moisture conservation techniques. Levels of irrigation showed a negative relation with WUE and positive relation with consumptive use. The peak consumptive use and crop coefficient coincided with the fullest development of canopy and flowering stage of the crop. The crop depleted about 50 per cent of soil water from the top 15 cm layer. The crop needed frequent irrigations as dictated by IW/CPE ratio 1.2 for maximum yield. Incorporation of moisture conservation materials substantially, increased the yield of cucumber. The increase in the yield by the addition of paddy waste, coir pith and sawdust over control was 27, 17 and 10 per cent respectively. Incorporation of moisture conservation materials can save five number of irrigations required by the crop.
EFFECT OF PACLOBUTRAZOL IN CONJUNCTION WITH HERBICIDE ANILOFOS ON AGED SEEDLINGS OF RICE
Authors:   Department of Agronomy, Agricultural College and Research Institute,Coimbatore 641003, T BINDU , S SANKARAN ,   Department of Agronomy, Agricultural College and Research Institute,Coimbatore 641003
Published: July 2023

Field experiments were conducted during rabi 1993-94 and Kharif 1994 to find out the effect of growth retardant paclobutrazol in conjunction with herbicide anilofos on aged seelings of rice. The highest grain yield was obtained with the application of paclobutrazol 200 g/ha at 8 days after sowing in the nursery and anilofos 0.4 kg/ha at 5 days after transplanting followed by paclobutrazol 200 g/ha at 8 days after transplanting in the main field. Paclobutrazol applied at 8 days after transplanting was preferred to 15 days before heading.
SEASONAL INCIDENCE AND MANAGEMENT OF APHID, Aphis punicae on POMEGRANATE
Authors:   Horticultural Research Station, Tamilnadu Agricultural University  Yercaud 636 602,Tamil Nadu, P KARUPPUCHAMY , G BALASUBRAMANIAN ,   Horticultural Research Station, Tamilnadu Agricultural University  Yercaud 636 602,Tamil Nadu, P.C SUNDARA BABU ,   Horticultural Research Station, Tamilnadu Agricultural University  Yercaud 636 602,Tamil Nadu
Published: July 2023

The maximum incidence of aphid, Aphis punicae was observed on pomegranate during the third week of February and March respectively in hill area at Yercaud and plains at Namakkal in Tamil Nadu. Both grubs and adults of the predatory coccinellid beetle. Scymnus coccivora were highly effective in reducing the population of aphids. A grub could feed on an average of 423 nymphs or 216 adults of aphids during the entire grub period. Inundative release of the green lace wing. Chrysoperla carnea @ 50 first instar nymphs per flowering branch four times at 10 days interval. coinciding the first release on the occurrence of aphids, resulted in 53.67 per cent reduction in aphid population. Among the chemicals, spraying of neem oil 3%, fish oil rosin soap 2.5%, phosalone and endosulfan at 0.07%, dimethoate and phosphamidon at 0.03% and methyl demeton 0.025% were highly effective in controlling the aphid population.
TARGETED YIELD CONCEPT IN A RICE-RICE-RESIDUAL PULSE CROPPING SEQUENCE UNDER IPNS IN TYPIC USTROPEPTS OF LOWER BHAVANI PROJECT AREA OF TAMILNADU
Authors:   Dept.of Soil Science and Agrl,Chemistry , Agricultual College and Research Institute,Tamil Nadu Agricultural University Coimbatore  641 003, R SANTHI , G SELVAKUMARI ,   Dept.of Soil Science and Agrl,Chemistry , Agricultual College and Research Institute,Tamil Nadu Agricultural University Coimbatore  641 003, PERUMAL RANI ,   Dept.of Soil Science and Agrl,Chemistry , Agricultual College and Research Institute,Tamil Nadu Agricultural University Coimbatore  641 003
Published: July 2023

With a view to assess the extent of fertiliser requirement under Integrated Plant Nutrition System (IPNS) for rice-rice-residual pulse cropping sequence, field experiments were conducted in Typic Ustropept soils of Lower Bhavani Project area in Tamil Nadu. Making use of the data generated from the field experiments conducted on Inceptisol, targeted yield equations were developed for rice in kharif and rabi seasons. From these equations, the quantity of chemical fertilisers that could be adjusted to the levels and sources of organic manures was evaluated to be 38 kg N, 13 kg P:Os and 33 kg K20ha for fertilisers with GM: 10-12 kp P:Osha for temilisers with PB :40 kg N, 26 kg P:Os and 33 kg K0ha for fertilisers with GM plus PB.
ASSESSMENT OF LOSSES IN BITTER GOURD DUE TO BITTER GOURD MOSAIC VIRUS
Authors:   Dept of Plant Breed and Genetics, Agricultural College and Res..Insti..,Coimbatore 641003, . SABITHA DORAISAMY , S.M PURUSHOTHAMAN ,   Dept of Plant Breed and Genetics, Agricultural College and Res..Insti..,Coimbatore 641003, B RAJAGOPALAN ,   Dept of Plant Breed and Genetics, Agricultural College and Res..Insti..,Coimbatore 641003, P LAKSHMANAN ,   Dept of Plant Breed and Genetics, Agricultural College and Res..Insti..,Coimbatore 641003
Published: July 2023

The infection of bitter gourd plant at the early stage by bitter gourd mosaic virus resulted in significant reduction of number of leaves, leaf area, intermodal length, thickness of vines, length of vines, number of branches, number of flowers, number of fruits and other fruit characters viz, length. of fruits, girth of fruits, weight of fruits and total yield of fruits
COIRPITH COMPOST A SUITABLE MEDIUM FOR MASS MULTIPLICATION OF Glomus Fasciculatum
Authors:   Department of Agricultural Microbiology,Tamil Nadu College and Research Institute, Tamil Nadu Agricultural University Coimbatore  641 003, S SUJATHA LILLY , P SANTHANAKRISHNAN ,   Department of Agricultural Microbiology,Tamil Nadu College and Research Institute, Tamil Nadu Agricultural University Coimbatore  641 003
Published: July 2023

An experiment was conducted to find out the best substrate for quick VAM fungi inoculum production. Different substrates viz, compost, composted pressmud, composted coirpith. vermiculite, perlite and vermiculite-perlite (1:1) were serceened in this study. The result revealed that composted coirpith was found to be superior in terms of infection percentage, extra- matrical hyphae and spore count. The finding indicated that composted coirpith could be employed as a substrate material for VAM fungi inoculum production.
YIELD OF RICE CULTIVARS UNDER DIFFERENT METHODS OF ESTABLISHMENT AND SCHEDULES OF IRRIGATION
Authors:   Agricultural College and Reserch Institute, Tamil Nadu Agricultural University, Coimbatore 641003, A CHRISTOPHER LOURDURAJ , A RAJAGOPAL ,   Agricultural College and Reserch Institute, Tamil Nadu Agricultural University, Coimbatore 641003
Published: July 2023

Investigations carried out at the Agricultural Research Station. Aliyamagar, Tamil Nadu. India during 1993-94 and 1994-95 revealed that irrigation one day after disappearance of ponded, water is the optimum irrigation regime for rice. Water requirement of rice varied from 932 nun to 1138 mm based on the irrigation regime and variety. The management practices of maintaining a population of 33 hills m2 adopting equidistant method of planting four seedlings hill proved to be feasible and best for yield maximisation under conditions of labour shortage. Varieties CO 45 and ADT 38 performed better than IR 20 with regard to grain yield and economics.
VARIETAL DISCRIMINATION OF KHARIF RICE VARIETIES USING REMOTE SENSING TECHNIQUES
Authors:   Dept.of Soil Science and Agrl,Chemistry , Agricultual College and Research Institute,Tamil Nadu Agricultural University Coimbatore  641 003, R KRISHNAN , S NATARAJAN ,   Dept.of Soil Science and Agrl,Chemistry , Agricultual College and Research Institute,Tamil Nadu Agricultural University Coimbatore  641 003, R.S JAYAMANI ,   Dept.of Soil Science and Agrl,Chemistry , Agricultual College and Research Institute,Tamil Nadu Agricultural University Coimbatore  641 003
Published: July 2023

Field experiments were conducted during 1992 and 1993 to study the possibility of discriminating kharif rice varieties using ground based remote sensing technique. Eight short duration varieties, viz, ASD 18, ADT 36, IR 50, IR 60, IR 64, JJ 92, TKM 9 and CO 37 which are predominantly grown in the command areas of Tamil Nadu were considered for the study. Spectral reflectance and crop biometrics were recorded at fortnightly intervals from 30 DAT upto harvest. The results revealed that four rice varieties viz, ADT 36, IR 50, IR 60 and JJ 92 alone could be discriminated from each other, whereas the other four rice varieties could not be discriminated because the spectral reflectance of these varieties were closer to one another. The crop biometrics like LAI, chlorophyll content, leaf nitrogen content and biomass production were responsible for the varietal discrimination. The discrimination was well pronounced in red and infrared bands and also in vegetation indices like IR/R and IR-R.
GENETIC ANALYSIS IN A DIALLEL CROSS OF INBRED LINES OF CASSAVA
Authors:   Central Tuber Crops Research Institute, Sreekariyam, Thiruvanathapuram,Kerala 695 017, C.S EASWARI AMMA , M.N SHEELA ,   Central Tuber Crops Research Institute, Sreekariyam, Thiruvanathapuram,Kerala 695 017
Published: July 2023

A study to determine gene action, heritability and number of effective genes controlling 13 traits utilizing Jinks - Hayman diallel analysis of the populations raised by a fix6 diallel cross of fourth generation inbred lines of cassava showed that overdominance governed most of the traits including yield and yield components. The number of gene groups controlling various traits was estimated and root yield was found to be controlled by 3 gene groups. Very low narrow sense heritability obtained for yield and its components also revealed the preponderance of non-additive gene action. The (Vr. Wr graph confirmed the role of overdominance for yield and its major components. The standardised deviation graph was used to identify superior parents. The study indicated the possibility of genetic improvement in cassas a through heterosis breeding.
INFLUENCE OF BIOCHEMICAL CONSTITUENTS ON THE SEX EXPRESSION OF PAPAYA
Authors:   Department of Crop PHysiology,Tamil Nadu Agricultural University, Agricultural College & Research Institute Madurai 625 104, N DHARA , L VEERANNAH ,   Department of Crop PHysiology,Tamil Nadu Agricultural University, Agricultural College & Research Institute Madurai 625 104
Published: July 2023

Studies were made on the biochemical substances of papaya, in two varieties (CO 5 and SRS) at three stages of crop growth in eight different seed groups. It was found that the leaf protein content was higher in the black and bold seeds; and also in the males followed by hermaphrodites and low in females. Phenol content was lower in females than males and hermaphrodites. The reverse was true with RNA and DNA contents. IAA oxidase activity was higher in the leaves of male papaya followed by the hermaphrodites and the lower in females. The females had more cytokinin and lower GA than the males and hermaphrodites.
EFFECT OF LONGTERM FERTILIZATION ON PHYSICAL PROPERTIES OF SOILS
Authors:   Dept.of Soil Science and Agrl,Chemistry , Agricultual College and Research Institute,Tamil Nadu Agricultural University Coimbatore  641 003, R.K VENNILA , P MUTHUVEL ,   Dept.of Soil Science and Agrl,Chemistry , Agricultual College and Research Institute,Tamil Nadu Agricultural University Coimbatore  641 003
Published: July 2023

Analysis of soil from the permanent manurial plots of Tamil Nadu Agricultural Unviersity farm at Coimbatore revealed that the clay content had a positive influence on water holding capacity and total pore space of soil and a negative influence with respect to hydraulic conductivity: Continuous application of cattle manure for 84 years recorded higher values for all the physical properties evaluated.
CORRELATION AND PATH ANALYSIS IN BACKCROSSES IN SESAME
Authors:   National Pules Research Center, Vamban Colony- 622 303,, N MANIVANNAN
Published: July 2023

Simple correlation analysis was done in two backcrosses B1 (TSS 4/Si 1125 // TSS 4) and 82 (TSS 4/Si 1225 // Si 1125). The analysis revealed branches, capsules on main stem and capsules on branches had significant association with seed yield. The path analysis revealed that capsules on braches had high direct effect on seed yield. The association analysis of B1 and B2 showed slight difference in the association of characters. However, the selection on capsules on branches will give simultaneous selection on seed yield in both the backcrosses."
EVALUATION OF HETEROSIS IN THE NEWLY EVOLVED BIVOLTINE HYBRIDS OF SILKWORM, Bombyx Mori
Authors:   Regional Sericultural Research Station Coonoor 643 101, C.K KAMBLE
Published: July 2023

The studies on the heterosis for the newly evolved bivoltine hybrids CSR2 x CSR4 and CSR2 x CSRS and their reciprocals have shown significant superiority over their parents. Helerosis was recorded highest in case of CSR2 x CSRS for fecundity (29.63%) as compared to other hybrids and also the heterobeltiosis (26.32%). Out of the hybrids studied as per evaluation index for all the traits, CSR2 & CSR5 registered maximum score ie., 58.59 than its reciprocal (44.14) and other hybrids CSR2 x CSR4 (53.61) and CSR4 x CSR2 (44.37), respectively. The hybrids CSR2 x CSR5 and CSR2 x CSR4 can be commercially exploited for obtaining maximum yield and better benefits at farmers level.
DEVELOPMENT AND TESTING OF A MOTOR OPERATED WEEDER
Authors:   College of Agricultural Engeering,Tamil Nadu Agricultural University Coimbatore 641003, R MURUGESAN , A TAJUDDIN ,   College of Agricultural Engeering,Tamil Nadu Agricultural University Coimbatore 641003, A SAMPATHRAJAN ,   College of Agricultural Engeering,Tamil Nadu Agricultural University Coimbatore 641003
Published: July 2023

A motor operated weeder was developed and tested in the field for weeding operation using sweep blade. The non-polluting eco-friendly traction device has less moving parts, negligible noise and vibration. A minimum power consumption of 550 W and an effective field capacity of 0.09 ha/h was obtained with the machine at a forward speed of 1.86 km/h with 450 mm width sweep blade at 20 mm depth of operation. The test results indicate the suitability of the machine for weeding and intercultural operations in row crops.
PERFORMANCE EVALUATION OF ROLLER GRADER FOR LIME
Authors:   College of Agricultural Engeering,Tamil Nadu Agricultural University Coimbatore 641003, T PANDIARAJAN , S PUGALENDHI ,   College of Agricultural Engeering,Tamil Nadu Agricultural University Coimbatore 641003, C.T DEVADAS ,   College of Agricultural Engeering,Tamil Nadu Agricultural University Coimbatore 641003
Published: July 2023

A divergent type roller grader was developed and tested for size grading of time. The unit is capable of grading 400 kg h of fruits at 8% slope. The effectiveness of the grader is found as 85%
EXTENT OF ADOPTION OF DEMONSTRATED GROUNDNUT CULTIVATION PRACTICES OF FRONTLINE DEMONSTRATION PROGRAMMES
Authors:   Dept. of Agril Extension, Tamil Nadu Agrl University, Coimbatore-641 003., P BABY KUMARI , K NANJAIYAN ,   Dept. of Agril Extension, Tamil Nadu Agrl University, Coimbatore-641 003.
Published: July 2023

To assess the influence of frontline demonstration scheme, on adoption of farm practices by the farmers 40 participants and 40 non-participants of Groundnut frontline demonstration were selected randomly in Madurai and Coimbatore districts. The needed data were collected and analysed. The results show that a considerable per cent (75 to 85%) of both the participants and non-participants have adopted the application of gypsum and pest and disease management practices after the introduction of frontline demonstration on groundnut cultivation. Frontline demonstration have increased the extent of adoption of modern groundnut cultivation practices.
NITROGEN SKIPPING THROUGH DUAL CROPPING OF Azolla WITH RICE
Authors:   Tamil Nadu Rice Research Institute, Aduthurai - 612101, Tamil Nadu, R THAMIZH VENDAN , G GOPALASWAMY ,   Tamil Nadu Rice Research Institute, Aduthurai - 612101, Tamil Nadu, S ANTHONI RAJ ,   Tamil Nadu Rice Research Institute, Aduthurai - 612101, Tamil Nadu, A ABDUL KAREEM ,   Tamil Nadu Rice Research Institute, Aduthurai - 612101, Tamil Nadu, P RANGANATHAN ,   Tamil Nadu Rice Research Institute, Aduthurai - 612101, Tamil Nadu
Published: July 2023

The possibility of skipping a top dressing of fertilizer N through the use of Azolla microphylla was studied. Inoculation of A. microphylla on 10 day after transplantation at I t ha" and incorporation at 30 DAT increased the soil organic carbon content and available N status. Skipping of the second top dressing of fertilizer N at 25 Kg ha' which coincides with Azolla trampling saves the fertilizer and labour for top dressing besides increasing the rice yield significantly at all the seasons tested.
SUCROSE ACCUMULATION PATTERN IN CERTAIN SUGARCANE VARIETIES UNDER DELAYED HARVEST
Authors:   Sugarcane Research Station,Tamilnadu Agricultural University,Sirugamani  639 115, H VIJAYARAGHAVAN
Published: July 2023

An investigation was undertaken to study the pattern of sucrose accumulation in five sugarcane varieties especially under delayed harvest. It was evident that maximum sugar accumulation occurred during 12th month irrespective of varieties. In general, the quality declined with advance in age. There was a mean reduction of 3.55% in quality by three months delay in harvest. Among the five varieties studied, sugar sustainability could be seen.in Si 86098 which recorded the highest CCS of 10.57% even at the age of 15th month. The present investigation led to the identification of cane clones for sugar sustainability even under delayed harvest. Such clones can be maintained and utilised for its sugar retention as donor.
EFFECT OF PLANT EXTRACTS FOR THE MANAGEMENT OF TOMATO LEAFCURL VIRUS (TLCV) IN TOMATO (Lycopersicon esculentum, Mill)
Authors:   Tamil Nadu Rice Research Institute, Aduthurai - 612101, Tamil Nadu, N RAGUPATHI , P NARAYANASAMY ,   Tamil Nadu Rice Research Institute, Aduthurai - 612101, Tamil Nadu
Published: July 2023

The experiment conducted in glass house for the management of tomato leaf curl virus in tomato revealed that among the 38 non-host plant species tested at 10% concentration as pre-inoculation spray, leaf extracts from Mirabilis jalapa and Catluaranthus roseus recorded 96% reduction in TLCV infection over contrl followed by Vitex negundo, Eucalyptus globulus, cynodon dactylon, Pongamia glabra, Acacia arabica leaf and pod Pithecellobium dulce bark, Datura metal, Thuja occidentalis, Ocimum sanctum, Coleus parviflorus, Mentha piperita and Dioscorea alata with reduction of disease varying from 84-92% over control.
VECTOR-VIRUS RELATIONSHIP OF BITTER GOURD MOSAIC VIRUS
Authors:   Departmeent of Plant Pathalogy College of Agricultural, Kerala Agricultural University, Vellayani 695 552, P LAKSHMANAN , S.M PURUSHOTHAMAN ,   Departmeent of Plant Pathalogy College of Agricultural, Kerala Agricultural University, Vellayani 695 552, B RAJA GOPALAN ,   Departmeent of Plant Pathalogy College of Agricultural, Kerala Agricultural University, Vellayani 695 552, DORAISWAMY SABITHA ,   Departmeent of Plant Pathalogy College of Agricultural, Kerala Agricultural University, Vellayani 695 552
Published: July 2023

The minimum acquisition feeding and inoculation feeding period of vector A. marvae were found to be 30s and 1 min respectively. But the percentage of transmission was maximum when an acquisition feeding period of 30 min inoculation feeding period of 2 h were given. Influence of starvation before acquisition and inoculation feeding period proved that pre-acquisition starvation for 2 h produced maximum infection but post-acquisition starvation decreased the percent infection. The vector could retain the virus for 1 h only. A single aphid could transmit the virus to healthy test plants, but maximum percentage of transmission was obtained with 10 aphids.
CHARACTER ASSOCIATION IN MUNG BEAN (Vigna radiata L. Wilzek)
Authors:   Dept.of Agrl,Botany,TNAU,Coimbatore, A RAMASAMY , K.S JEHANGIR ,   Dept.of Agrl,Botany,TNAU,Coimbatore
Published: July 2023

The study was undertaken to examine the nature and magnitude of association of seed yickd with other attributes viz., number of branches, number of clusters, number of pods per plant. pod length, number of seeds per pod and 100 seed weight. The seed yield per plant exhibited a high order of positive and significant correlation with number of pods, number of cluster per plant and number of branches per plant and 100 seed weight. Path analysis showed that, the improvement of seed yield could be achieved only through increasing pods per plant.
COMPATIBILITY OF FOLIAR SPRAY OF INSECTICIDES AND FERTILIZERS AND THEIR INFLUENCE ON THE YIELD OF RAINFED COTTON
Authors:   Agricultural Research Station,Tamilnadu Agricultural University,Kovilpatti 628 510 Tamilnadu., K SUNDARAVADIVEL , T CHITESWARI ,   Agricultural Research Station,Tamilnadu Agricultural University,Kovilpatti 628 510 Tamilnadu., S SUBRAMANIAN ,   Agricultural Research Station,Tamilnadu Agricultural University,Kovilpatti 628 510 Tamilnadu., D KRISHNADOSS ,   Agricultural Research Station,Tamilnadu Agricultural University,Kovilpatti 628 510 Tamilnadu., V RAJARAM ,   Agricultural Research Station,Tamilnadu Agricultural University,Kovilpatti 628 510 Tamilnadu., S RAMAMURTHY ,   Agricultural Research Station,Tamilnadu Agricultural University,Kovilpatti 628 510 Tamilnadu.
Published: July 2023

Field experiments were conducted during the seasons of 1991-1992 to 1992-1994 to study the combined effect of foliar spray of 2% DAP, 0.5% zinc sulphate and endosulfan on the yield and yield attributes of rainfed cotton. Significant increase in seed cotton yield (305 kg ha'') was registered with the combined foliar application of insecticide (Endosulfan) and fertilizers (@% DAP and 0.5% zinc sulphate) on 45 DAS, following the recommended basal soil application of 40kg N ha and 20 kg P ha. The yield economics of the cotton also confirms the same treatment.
ASSOCIATION OF YIELD AND SOME PHYSIOLOGICAL TRAITS IN SESAME (Sesamum indicum L.)
Authors:   Department of Agricultural Botany,Agricultural College and Research Institute,Madurai 625104 TamilNadu., S BACKIYARANI , A AMIRTHADEVARATHINAM ,   Department of Agricultural Botany,Agricultural College and Research Institute,Madurai 625104 TamilNadu., S SHANTHI ,   Department of Agricultural Botany,Agricultural College and Research Institute,Madurai 625104 TamilNadu.
Published: July 2023

Correlation of yield and some physiological traits in sesame was estimated in six parents and their thirty hybrids which were obtained through a full diallel crossing programme. In general, the genotypic correlations were higher than phenotypic ones. Single plant yield had high positive association with harvest index, number of capsules and days to flowering both at phenotypic and genotypic level. The traits like days to first flowering, plant height, number of capsules and harvest index were mutually correlated with each other.
GENETIC COMPONENTS OF VARIATION IN UPLAND COTTON (G. hirsutum L)
Authors:   Regional Agricultural Research Station, Lam, Guntur - 522 034 Andhra Pradesh., J.S.V SAMBA MURTHY
Published: July 2023

A ten parent diallel cross analysis involving bollworm tolerant donor lines of upland cotton was studied for component of variance analysis for seven traits. Both additive and non-additive gene action were important for all the traits except seed index. However the role of dominance was major for all the traits studied. Dominance was ambidirectional for all the traits studied. Epistasis influenced the performance of number of bolls and seed cotton yield. Narrow sense heritability was high for days to 50 per cent flowering, boll number and seed cotton yield/plant while moderate for boll weight, seed index, lint index and ginning percentage. The number of genes controlling inheritance of the traits were established. Any form of recurrent selection may be followed for exploiting all the three types of gene actions.
PHYSIOLOGY OF PARENTS AND HYBRID BLACKGRAM FOLLOWING GAMMA IRRADIATION
Authors:   Post Graduate Department of Botany, Jamal Mohamed College Tirichirapalli 620 020, S AHMED JOHN
Published: July 2023

Gamma rays induced high rate in blackgram photosynthesis and total chlorophyll content in parents and Fi hybrid. Chlorophyll a and b was maximum in hybrid followed by Vamban I and Co 5. The ratio of chlorophyll a/b, showed a positive trend during mutagenesis, however declined at higher doses. In both parents and hybrid, the rate of respiration gradually increased, while flagging subsequently.
EFFECT OF SURGE IRRIGATION ON YIELD ATTRIBUTES, YIELD AND ECONOMICS OF SUNFLOWER (CO-2)
Authors:   Water Technology Centre, Coimbatore  641 003, N.K SATHYAMOORTHY , A RAJAGOPAL ,   Water Technology Centre, Coimbatore  641 003
Published: July 2023

Experiments were conducted at Tamil Nadu Agricultural University, Coimbatore to study the effect of surge irrigation on yield attributes, yield and economics of sunflower (Co-2) in summer and monsoon seasons of 1996. The crop was grown in double row planting. No significant difference was observed between surge and continuous irrigation. Considering amendments, coconut fibre waste application (with additional dose of NPK) significantly increased yit ad attributes and yield as compared to FYM application. Among the sectors, sector I recorded higher values which was comparable with Sector II and IV. Sector III significantly different from other sectors in first crop. In second crop Sector-1 was comparable with sector II and IV and again Sector IV was comparable with sector III. The higher net returns with high benefit cost ratio was observed in surge irrigation as compared to continuous irrigation. Also coconut fibre waste applied plots recorded increased yield.
EFFECT OF ORGANIC, INORGANIC SOURCES OF NITROGEN AND MOLYBDENUM ON THE QUALITY OF BAJRA-NAPIER HYBRID GRASS (CO 2)
Authors:   Department of Agronomy, Agricultural College and Research Institute,Coimbatore 641003, K.P SASIREKA , I SEKAR ,   Department of Agronomy, Agricultural College and Research Institute,Coimbatore 641003, A RANGASAMY ,   Department of Agronomy, Agricultural College and Research Institute,Coimbatore 641003
Published: July 2023

Field experiment was conducted at the Tamilnadu Agricultural University, Coimbatore to study the effect of organic (FYM) and inorganic sources (Urea, CAN) of nitrogen with and without molybdenum on the quality characters of CO2 Bajra Napier hybrid grass under irrigated condition. The results indicated that application of 75 kg N ha in the from of urea with 2.5 t of FYM ha recorded higher crude fibre, crude fat and total ash content than the other treatments. The interaction effect did not influence the crude fibre, crude fat and the total ash content.
NUTRIENT AND DROUGHT MANAGEMENT PRACTICES FOR RAINFED SORGHUM UNDER VERTISOL
Authors:   Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore 641003, N DEVARANI , A RANGASAMY ,   Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore 641003
Published: July 2023

Field experiments were conducted during north east monsoon seasons of 1994-95 and 1995-96 under vertisol of Tamil Nadu Agricultural University, Coimbatore to evolve suitable nutrient and drought management practices with combined use of inorganic fertilizers and organic manures along with various seed hardening materials in rainfed sorghum (Co 26). The results of the present study revealed that the enriched pig manure @ 875 kg with 40 Kg N ha along with 2 per cent Calotropis leaf extract seed hardening for sorghum recorded higher growth attributes which inturn resulted in higher grain yield as compared to other treatments.
EFFICIENCY OF DUAL CROPPING OF GREEN MANURES WITH MAIZE ON WEED MANAGEMENT
Authors:   Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore 641003, N RAJAGOPAL , K VELAYUDHAM ,   Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore 641003, P RAJENDRAN ,   Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore 641003, S RADHAMANI ,   Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore 641003
Published: July 2023

Two field experiments were conducted at Tamil Nadu Agricultural University, Coimbatore during rabi. 1994 and Kharif, 1995 to investigate the weed suppressing effect of green manures grown with maize as dual crop. The results revealed that raising cowpea as a dual crop with maize at a spacing of 60 x 20 cm not only suppresses the weed growth but also supplies nutrient to the crop, resulting in highest grain yield, (62 q/ha) net return (Rs. 12,006/ha) and BC ratio (2.06) compared to 43.6 q/ha, Rs. 6376/- and 1.55 respectively under sole cropping of maize.
ALLOMETRIC RELATIONSHIP IN Prosopis Juliflora (SWARTZ) DC. SEEDLINGS.
Authors:   Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore 641003, V CHELLAMUTHU , TN BALASUBRAMANIAN ,   Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore 641003, S.P PALANIAPPAN ,   Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore 641003
Published: July 2023

Studies on alloctric relationship in Prosopis juliflora (Swartz) DC. Seedlings revealed that though there was a positive correlation between shoot length and root length, it was not significant as evident from the simple regression model. However, there was a positive significant relationship between shoot weight and root weight of Prosopis seedlings indicating that the shoot weight was dependent on its root weight. The above ground dry matter (shoot weight) could be considered as a scientific parameter for the selection of better planting stocks of Prosopis juliflora.
EFFECT OF SUGAR FACTORY EFFLUENT ON GROWTH, YIELD AND QUALITY OF BHENDI - VAR PKM-1
Authors:   Dept.of Soil Science and Agrl,Chemistry ,Agrl. College and Res. Institute Madurai 625 104 Tamilnadu, A RATHINASAMY , C.R LAKSHMI NARASHIMHAN ,   Dept.of Soil Science and Agrl,Chemistry ,Agrl. College and Res. Institute Madurai 625 104 TamilnaduDept.of Soil Science and Agrl,Chemistry ,Agrl. College and Res. Institute Madurai 625 104 Tamilnadu
Published: July 2023

A field experiment was conducted to study the effect of sugar factory effluents on growth, yield and quality of bhendi-var PKM 1 in the premises of a sugar factory in Aundipatti, Madurai District. The crop quality was not affected. Increased yields were obtained with 50% and 75% dilutions when compared to zero per cent dilution. There was no adverse effects on the soil physical properties. The effluent can be used for irrigating bhendi with proper dilution.
CYTOZYME FOR INCREASED YIELD OF GROUNDNUT
Authors:   Dept.of Soil Science and Agrl,Chemistry ,Agrl. College and Res. Institute Coimbatore 641003, K.K MATHAN , V.S KRISHNAMURTHI ,   Dept.of Soil Science and Agrl,Chemistry ,Agrl. College and Res. Institute Coimbatore 641003
Published: July 2023

Foliar application of cytozyme to groundnut crop at peg formation stage at 0.05 percent concentration gave an increased pod yield of 18.5 per cent over control. This spray application also resulted in 23.0 percent increase in LAI, 27.9 percent increase in chlorophyll content and significant increase is macro and micronutrient uptake. The oil content of kereal also increased by 7.1 per cent over control.
RATE OF MOISTURE USE AND PATTERN OF EXTRACTION IN BITTERGOURD DURING DIFFERENT GROWTH STAGES
Authors:   Agronomic Research Station,Chalakudy 608307 Kerala, K.C MANORAMA THAMPATTI , G SANTHAKUMARI ,   Agronomic Research Station,Chalakudy 608307 Kerala
Published: July 2023

Estimation of rate of soil moisture use and pattern of extraction by bittergourd was attempted with four levels of N and irrigation. The irrigation at 15 mm CPE was found to be the optimum level of irrigation for bittergourd since its fruit yield was statistically on par with the fruit yield of farmer's practice of irrigation which recorded the highest yield. The crop extracted the highest quantity of moisture from top 0-30 cm soil layer, during both vegetative and reproductive stages. Peak period of soil moisture use for bittergourd was during 25 to 40 days after sowing (DAS) which coincides with the actively growing vegetative period and the start of profuse flowering. The seasonal average for daily water intake of bittergourd, for irrigation at 15 mm CPE and farmer's practice were 4.07 and 4.43 mm, respectively.
DETERMINATION OF INSECTICIDE RESIDUES IN POMEGRANATE FRUITS
Authors:   Department of Agricultural Entomology,Tamil Nadu Agrl University,Coimbatore 641 003, P KARUPPUCHAMY , G BALASUBRAMANIAN ,   Department of Agricultural Entomology,Tamil Nadu Agrl University,Coimbatore 641 003, P.C SUNDARA BABU ,   Department of Agricultural Entomology,Tamil Nadu Agrl University,Coimbatore 641 003
Published: July 2023

The residues of endosulfan and malathion were estimated in/on fruits of pomegranate 1,3, 7 and 15 days after insecticide spray at Horticultural Research Station, Yercaud. The initial deposit of endosulfan and malathion in/on fruits were 4.118, 6.149, 4.302 and 6.103 ppm for sprays of endosulfan at 0.07 and 0.14 per cent, malathion 0.1 and 0.2 per cent respectively. The safe waiting periods for the harvest of fruits after the spray of endosulfan and malathion at recommended doses were 2.58 and 0.94 days respectively. More than 99 per cent of residues dissipated within 15 days after the spray of endosulfan and within 7 days after the spray of malathion.
EVALUATION OF CARBOSULFAN AGAINST CARMINE SPIDER MITE Tetranychus cinnabarinus (Boisd.) ON BHENDI
Authors:   Department of Entomology,Tamil Nadu Agrl University,Coimbatore 641 003, C CHINNIAH , A RAGUPATHY ,   Department of Entomology,Tamil Nadu Agrl University,Coimbatore 641 003, S SUBAHARAN ,   Department of Entomology,Tamil Nadu Agrl University,Coimbatore 641 003
Published: July 2023

A field study conducted on bhendi to evaluate the efficacy of carbosulfan (Marshal) 25 EC against the carmine spidermite Tetranychus cinnabarinus indicated that carbosulfan 0.075% is equally effective as that of proven acaricides viz., Ethion 50 EC and Fenpropathrin 10 EC in reducing mite population when applied twice on 30th and 45th days after sowing.
PREY POTENTIAL AND PREFERENCE OF THREE RICE DWELLING SPIDERS
Authors:   Soil and Water Management Research Institute,Tamil Nadu Agricultural University, Kattuthottam 613 501 Thanjavur, K SAMIAYYAN , B CHANDRASEKHARAN ,   Soil and Water Management Research Institute,Tamil Nadu Agricultural University, Kattuthottam 613 501 Thanjavur
Published: July 2023

Laboratory experiments conducted at Soil and Water Management Research Institute, (TNAU), Thanjavur to assess the prey potential and preference of three common rice dwelling spiders on rice pests showed that Pardosa sp was the most efficient predator and it had the highest predatory potential with BPH (14.31) followed by WBPH (10.96). Tetragnatha and Oxyopes sp. consumed more of GLH 5.69 and 7.29 and their potential against WBPH and WBPH and BPH was almost equal. Pardosa preferred plant hoppers (BPH and WBPH) to leaf hopper (GLH). Terragnatha and Oxyopes preferred more of GLH than WBPH and BPH. The three spiders behaved differently on the preference of moths of leaf folder, stem borer and caseworm.
PREDICTING RICE LEAFFOLDER DAMAGE AND YIELD LOSS IN IR 50 RICE BY MATHEMATICAL MODELLING
Authors:   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu, V PANDI , P.C SUNDARA BABU ,   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu, C KAILASAM ,   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu
Published: July 2023

The predicted damage and yield loss caused by rice leaffolders, Cnaphalocrocis medinalis (Guence) and Marasmia patnalis (Bradley) in microplot experiment during kharif 1996 showed that the yield loss was higher at the initial infestation by leaffolder larvae at 40 DAS than the infestation at 30 DAS. There was no proportionate increase in yield loss with increasing larval populations. The rate of yield loss due to an increment of one percent damage was more pronounced at 10 percent base level damage i.e., 10 to 11 percent than at higher base level damage of 20, 30 to 90 percent.
SOIL QUALITY VS FARMLAND PRICES IN THE NILGIRIS
Authors:   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu, C SEKAR , C RAMASAMY ,   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu, C KAILASAM ,   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu
Published: July 2023

The present investigation was carried out to analyse the influence of qualitative and quantitative attributes on farmland pricing behaviour in Katteri and Jagathala watersheds in the Nilgiris district, Tamil Nadu. A total number of 120 respondents was contacted for the present study. The results obtained from the hedonic regression clearly demonstrated the influence of soil depth, soil wetness, percentage of crop lands, soil quality etc. on farmland prices. The choice variables viz. community housing, farm size, population change, population density and the interaction terms involving population density and soil quality did not show any significant impact on crop land price. The study further showed that the above variables explained 82 percent change in farmland price. The findings obtained would be useful for the land owners in making investment decisions on soil conservation based on the significance of the influencing variables on farmland price. The outcome of the research findings can be used in deciding the level of subsidies to be extended by the Government for conservation projects.
INCOME AND EMPLOYMENT OF AGRICULTURAL LABOURERS IN TUTICORIN DISTRICT
Authors:   Department of Agricultural Economics, TNAU,Coimbatore 641 003, N.R PADMANABAN
Published: July 2023

A study was conducted in Tuticorin district to analyse the income and employment pattern of agricultural labourers. The study indicated that the average annual employment per family was 494.25 mandays for males and 335.45 for females. Agriculture contributed a major share of 53.78 per cent of employment for males and 58.21 percent for females. The annual per capita employment for males in the study area was 268.83 mandays and for females it was 247.97 mandays. The average annual income per family was Rs. 22965.41, of which wage income accounted for 68.73 percent and non-farm income 22.78 percent. The mean annual per capita income was Rs. 7319.56.
INPUT USE EFFICIENCY IN PADDY WITH SPECIAL REFERENCE TO WATER - A TRANSLOG PRODUCTION FUNCTION APPROACH
Authors:   Department of Agricultural Economics, CARDS TNAU,Coimbatore 641 003, N.R PADMANABAN
Published: July 2023

A study conducted in Krishnagiri Reservoir Project (KRP) in Tamil Nadu indicated that the water use efficiency in Navarai paddy was the highest in tail region with 32.85 kg/ha cm of water, followed by middle and head regions. Translog production functions were employed for each region to analyse the input use efficiency. The results clearly showed that labour and irrigation water were overused in the ayacut area whereas the inorganic fertilizers were underutilised and there is scope for increasing the productivity of navarai paddy through rational use of these scarce resources.
THE EFFECT OF THREE PESTICIDES AND PESTICIDE INTERVAL ON Cinnamomum verum galls in Southern Sri Lanka.
Authors:   Department of Agricultural Biology, Faculty of Agriculture,University of Ruhuna Mapalana Kamburupitiya Sri Lanka, T.K.H SAHABANDU , RAJAPAKSE ROHAN ,   Department of Agricultural Biology, Faculty of Agriculture,University of Ruhuna Mapalana Kamburupitiya Sri Lanka, RATNASEKERA DISNA ,   Department of Agricultural Biology, Faculty of Agriculture,University of Ruhuna Mapalana Kamburupitiya Sri Lanka
Published: July 2023

Experiments performed to find a suitable pesticide and a pesticide interval to control a gall causing insect Triozu cinnamomi indicated that there was significant effect of all three insecticides monocrotophos, lannate and methamidophos on tested distribution of galls at 3 crown levels tested. There were no significant differences between the crown levels in respect of gall distribution. Monocrotophos (30ml/25L) was found to be the most effective pesticide and 4 days interval was found to be the best spraying interval to control gall causing insect T. cinnamomi
VEGETATIVE PROPAGATION OF DALBERGIA SISSOO BY STEM CUTTINGS
Authors:   Forest College and Research Institute,Tamilnadu Agricultural University,Mettupalayam 641 301, K BAVANISANKAR , M PARAMATHMA ,   Forest College and Research Institute,Tamilnadu Agricultural University,Mettupalayam 641 301
Published: July 2023

Four growth regulators viz.. IAA, IBA, NAA & GA each at three concentrations of 50, 100 and 200 ppm were used for rooting of semi-hard as well as hard-wood stem cutting in D.Sissoo. A conjoint evaluation, of all parameters brought into limelight the superiority of 200 ppm IBA. A comparison of the nature of the cuttings revealed the better performance of semi-hard wood than the hard wood cuttings. Thus for vegetative multiplication of D.Sissoo use of semi-hard wood stem cuttings and their immersin in 200 ppm IBA for four hours are found to be encouraging.