cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.19928849
title: Job satisfaction among rural extension agents: a qualitative research in Caldas, Colombia

description: As a contribution to the positioning of the rural extension as multidimensional object of study, we analyzed the assessments made by rural extension agents about situations inherent to their everyday experience of work, followed by the identification of factors of job satisfaction and dissatisfaction. Consistent with the qualitative nature of the study, the information was generated from semi-structured interviews with 23 rural extension agents affiliated to the Agency of Agricultural Technical Assistance (UMATA) in five municipalities of Caldas State, Colombia. The analysis identified eight factors: a) love for the profession, b) possibilities of social projection, c) scope and display of achievements, d) public recognition, e) promotion opportunities, f) possibilities of continuous learning, g) autonomy, h) labor stability. We concluded that ignoring the emotional condition of the extension agents towards the job produces the risk of creating or preserving scenes that limit the commitment with the social work practice realized and the preservation of the professional vocation.
DOI: 10.6084/m9.figshare.19928852.v1
title: Effect of phosphate fertilization in production of soybean seeds

description: Phosphorus can contribute to increase seed quality and grain yield. The aim of this study was to evaluate the effect of phosphorus fertilization on quality, chemical composition and yield of soybean seeds and yield of crops established from these seeds. Assay 1 evaluated the following treatments: T1 - control, sowing without P2O5; T2: 50% less than the recommended P2O5 rate based on the soil analysis; T3: 100% of the recommended P2O5 rate; T4: 50% more than the recommended P2O5 rate; and T5: 100% more than the recommended P2O5 rate. After harvest, the number of seeds and pods per plant, yield, germination, viability and vigor by tetrazolium test, chemical composition and thousand-seed weight were determined. Assay 2 was conducted with the seeds harvested in Assay 1 to evaluate the number of pods per plant, number of seeds per plant and yield. The experiment was arranged in randomized blocks with five replicates. The phosphorus fertilization provided greater vigor in soybean seeds, besides contributing to increased phosphorus, iron and zinc in seeds produced. Seeds with higher phosphorus concentration contribute to the increase in soybean yield.
DOI: 10.6084/m9.figshare.19928852
title: Effect of phosphate fertilization in production of soybean seeds

description: Phosphorus can contribute to increase seed quality and grain yield. The aim of this study was to evaluate the effect of phosphorus fertilization on quality, chemical composition and yield of soybean seeds and yield of crops established from these seeds. Assay 1 evaluated the following treatments: T1 - control, sowing without P2O5; T2: 50% less than the recommended P2O5 rate based on the soil analysis; T3: 100% of the recommended P2O5 rate; T4: 50% more than the recommended P2O5 rate; and T5: 100% more than the recommended P2O5 rate. After harvest, the number of seeds and pods per plant, yield, germination, viability and vigor by tetrazolium test, chemical composition and thousand-seed weight were determined. Assay 2 was conducted with the seeds harvested in Assay 1 to evaluate the number of pods per plant, number of seeds per plant and yield. The experiment was arranged in randomized blocks with five replicates. The phosphorus fertilization provided greater vigor in soybean seeds, besides contributing to increased phosphorus, iron and zinc in seeds produced. Seeds with higher phosphorus concentration contribute to the increase in soybean yield.
DOI: 10.6084/m9.figshare.19928854
title: Rooting of blackberry cuttings in function of fertilization nitrogen in the mother plant

description: The aim of this study was to evaluate the effect of nitrogen fertilization in mother plants on rooting of blackberry cuttings. The experiment was conducted at Embrapa Temperate Climate, Pelotas, Brazil. The experimental design was completely randomized in a 2x5 factorial, being, two cultivars ('Tupy' and 'Xavante') and five levels of nitrogen (N) (0; 7,5; 15; 22,5 and 30 g plant-1). We evaluated: percentage (%) of rooted cuttings, with callus, living, sprouted, and the length of roots and sprouts (cm), number of roots / cutting and number of sprouts / cutting. Rooting and number of roots per cutting there was a linear increase with increase of N applied in the plant mother, the opposite effect that was observed in the variable callus. The length of the longest sprout, the number of roots and sprouts and sprouting (%) was higher in ''Xavante'' (2,68, 3,02, 1,22 and 52,08, respectively). In live cuttings stood out 'Tupy' cultivar (98,55%). In this context we conclude that the use of nitrogen in mother plant matrices can be beneficial to the rooting of blackberry, as well as the initial development of roots and sprouts of new plants, but with negative effects on parameters of length greater roots and percentage of callus.
DOI: 10.6084/m9.figshare.19928854.v1
title: Rooting of blackberry cuttings in function of fertilization nitrogen in the mother plant

description: The aim of this study was to evaluate the effect of nitrogen fertilization in mother plants on rooting of blackberry cuttings. The experiment was conducted at Embrapa Temperate Climate, Pelotas, Brazil. The experimental design was completely randomized in a 2x5 factorial, being, two cultivars ('Tupy' and 'Xavante') and five levels of nitrogen (N) (0; 7,5; 15; 22,5 and 30 g plant-1). We evaluated: percentage (%) of rooted cuttings, with callus, living, sprouted, and the length of roots and sprouts (cm), number of roots / cutting and number of sprouts / cutting. Rooting and number of roots per cutting there was a linear increase with increase of N applied in the plant mother, the opposite effect that was observed in the variable callus. The length of the longest sprout, the number of roots and sprouts and sprouting (%) was higher in ''Xavante'' (2,68, 3,02, 1,22 and 52,08, respectively). In live cuttings stood out 'Tupy' cultivar (98,55%). In this context we conclude that the use of nitrogen in mother plant matrices can be beneficial to the rooting of blackberry, as well as the initial development of roots and sprouts of new plants, but with negative effects on parameters of length greater roots and percentage of callus.
DOI: 10.6084/m9.figshare.19928855
title: Organic carbon stocks and fractions and soil fertility under forest, agriculture and livestock

description: Understanding the phenomena of carbon exchange between soils, waters and atmosphere is critical to the management and conservation of agrarian and natural ecosystems. The objective of this study was to determine the organic carbon stocks and their fractions, and the soil fertility under different forest management practices, agricultural and pastoral, on the campus of Florestal, Federal University of Viçosa, aiming to propose indicators for the assessment of soil management and conservation. Organic carbon stocks and fractions were determined and chemical analysis was performed for soil samples collected at depths of 0 to 20 and 20 to 40 cm under native forest remnants (Forest), farmlands under center pivot irrigation (Pivot) and areas of cultivation of Corymbia citriodora (Corymbia citriodora (Hook.) K.D. Hill & L.A.S. Johnson) (Eucalyptus), Joannesia princeps Vell. (Cutieira) and Brachiaria decumbens Stapf (Pasture). The results indicated that the organic carbon stokes and stability increased with the soil fertility. The forest systems, mainly the native forest remnants together with management systems integrating forests with livestock, compared with continuous cropping or monoculture pasture had larger, more stables and less soluble carbon stocks, with more aromatic and hydrophobic forms (greater HA/FA ratio), indicating lower leaching potential of carbon to the adjacent aquatic system
DOI: 10.6084/m9.figshare.19928855.v1
title: Organic carbon stocks and fractions and soil fertility under forest, agriculture and livestock

description: Understanding the phenomena of carbon exchange between soils, waters and atmosphere is critical to the management and conservation of agrarian and natural ecosystems. The objective of this study was to determine the organic carbon stocks and their fractions, and the soil fertility under different forest management practices, agricultural and pastoral, on the campus of Florestal, Federal University of Viçosa, aiming to propose indicators for the assessment of soil management and conservation. Organic carbon stocks and fractions were determined and chemical analysis was performed for soil samples collected at depths of 0 to 20 and 20 to 40 cm under native forest remnants (Forest), farmlands under center pivot irrigation (Pivot) and areas of cultivation of Corymbia citriodora (Corymbia citriodora (Hook.) K.D. Hill & L.A.S. Johnson) (Eucalyptus), Joannesia princeps Vell. (Cutieira) and Brachiaria decumbens Stapf (Pasture). The results indicated that the organic carbon stokes and stability increased with the soil fertility. The forest systems, mainly the native forest remnants together with management systems integrating forests with livestock, compared with continuous cropping or monoculture pasture had larger, more stables and less soluble carbon stocks, with more aromatic and hydrophobic forms (greater HA/FA ratio), indicating lower leaching potential of carbon to the adjacent aquatic system
DOI: 10.6084/m9.figshare.19928858.v1
title: Vegetative development and production of Jatropha in response to phosphorus fertilization

description: The industrial processing of mango generates by-products such as kernel and peel that are usually discarded without proper utilization. The objective of this study was to investigate the physicochemical and functional properties of native and acidified starch separated from mango kernels of variety Tommy Atkins, searching for a new source of starch, ways to improve it and contribute to the utilization of residues from the food industry. Kernels were removed manually and starch was extracted. The native starch was acidified with hydrochloric acid and its chemical composition was -determined. Functional and paste properties of native and acidified starch was also determined. The chemical composition of the native starch consisted of 71.56% starch, 7.30% lipids and 5.6% protein. Native and acidified starches showed low resistance to high temperature, with maximum swelling at 75oC of 9.395 and 6.861 g/g, respectively. The solubility increased with temperature achieving the maximum of 48.03% for acidified starch. The native starch had greater capacity to absorb water and oil and greater paste clarity. It also showed the highest peak viscosity, hold on, breakdown, final viscosity, setback and paste temperature than the acidified starch. The native starch can be indicated to make dehydrated soups and meat products, while the acidified starch can be used in frozen and chilled food and candy industry.
DOI: 10.6084/m9.figshare.19928858
title: Vegetative development and production of Jatropha in response to phosphorus fertilization

description: The industrial processing of mango generates by-products such as kernel and peel that are usually discarded without proper utilization. The objective of this study was to investigate the physicochemical and functional properties of native and acidified starch separated from mango kernels of variety Tommy Atkins, searching for a new source of starch, ways to improve it and contribute to the utilization of residues from the food industry. Kernels were removed manually and starch was extracted. The native starch was acidified with hydrochloric acid and its chemical composition was -determined. Functional and paste properties of native and acidified starch was also determined. The chemical composition of the native starch consisted of 71.56% starch, 7.30% lipids and 5.6% protein. Native and acidified starches showed low resistance to high temperature, with maximum swelling at 75oC of 9.395 and 6.861 g/g, respectively. The solubility increased with temperature achieving the maximum of 48.03% for acidified starch. The native starch had greater capacity to absorb water and oil and greater paste clarity. It also showed the highest peak viscosity, hold on, breakdown, final viscosity, setback and paste temperature than the acidified starch. The native starch can be indicated to make dehydrated soups and meat products, while the acidified starch can be used in frozen and chilled food and candy industry.
DOI: 10.6084/m9.figshare.19928860
title: Monitoring nutritional status of flooded rice cultivars by chlorophyll meter in nitrogen fertilization management

description: Chlorophyll meter can help in the management of topdressing nitrogen fertilization, however, there isn't a critical reading value with a satisfactory relationship with grain yield. The objective of this study was to monitor the nitrogen (N) level in flooded rice plants, cultivars IRGA 422CL and IRGA 424, using the chlorophyll meter and associating the readings with green/dry matter production and grain yield. Two experiments were carried out in the crop years 2007/08 and 2008/09 with N rates for the 1st and 2nd topdressing fertilizations, followed by SPAD (Soil Plant Analysis Development) readings and determination of green/dry mater, N content in plant tissue, accumulated N and grain yield. It was found effect of the 1st and 2nd N applications on chlorophyll meter readings along the cycle, however, the SPAD readings became similar with time for all treatments. Green/dry matter production and accumulated N responded linearly to the N rates. There was no effect of interaction for N rates and grain yield, but the response of grain yield as a function of N rates was described by a quadratic equation in both experiments. SPAD readings evaluated the nutritional status of flooded rice plants but did not show accurate information about N needs with reflexes in the yield. Therefore, chlorophyll meter readings could be associated to other parameters, such as green/dry mater to help interpretation and adjustment of N topdressing fertilization.
DOI: 10.6084/m9.figshare.19928860.v1
title: Monitoring nutritional status of flooded rice cultivars by chlorophyll meter in nitrogen fertilization management

description: Chlorophyll meter can help in the management of topdressing nitrogen fertilization, however, there isn't a critical reading value with a satisfactory relationship with grain yield. The objective of this study was to monitor the nitrogen (N) level in flooded rice plants, cultivars IRGA 422CL and IRGA 424, using the chlorophyll meter and associating the readings with green/dry matter production and grain yield. Two experiments were carried out in the crop years 2007/08 and 2008/09 with N rates for the 1st and 2nd topdressing fertilizations, followed by SPAD (Soil Plant Analysis Development) readings and determination of green/dry mater, N content in plant tissue, accumulated N and grain yield. It was found effect of the 1st and 2nd N applications on chlorophyll meter readings along the cycle, however, the SPAD readings became similar with time for all treatments. Green/dry matter production and accumulated N responded linearly to the N rates. There was no effect of interaction for N rates and grain yield, but the response of grain yield as a function of N rates was described by a quadratic equation in both experiments. SPAD readings evaluated the nutritional status of flooded rice plants but did not show accurate information about N needs with reflexes in the yield. Therefore, chlorophyll meter readings could be associated to other parameters, such as green/dry mater to help interpretation and adjustment of N topdressing fertilization.
DOI: 10.6084/m9.figshare.19928861.v1
title: Physico-chemical characterization of espresso coffee beverage prepared from blends of arabica and conilon coffees

description: In recent years, there has been a growing interest for exquisite beverages such as espresso coffee. Espresso coffee requires a high content of the aqueous extract to ensure a good body of the beverage, which can be obtained using coffee conilon. Espírito Santo State is the largest producer of conilon coffee in Brazil. Although there are several studies on the physico-chemical composition of Brazilian coffee, there is a lack of information about the use of conilon from Espírito Santo in the formulation of blends with Arabica coffee, as well as the physico-chemical characteristics of espresso coffee beverage obtained with these blends. The objective of this study was to carry out the physico-chemical characterization of espresso coffee beverage made from blends of arabica and conilon coffees (in arabica and conilon proportions of 100:0; 80:20; 60:40; 40:20 and 0:100, respectively) with different types of processing (dry process and semi dry process) produced in Espírito Santo. The variables moisture, pH, titratable acidity and aqueous extract of the samples were analyzed. It was found that the use of conilon in blends with Arabica, in the two forms of processing, results in beverages with higher levels of pH, lower acidity and higher percentage of aqueous extract. A higher percentage of aqueous extract is interesting for the preparation of espresso coffee. The results demonstrate the feasibility of using conilon coffee in blends with Arabica coffee in brewing espresso coffee, when a higher aqueous extract beverage is desired.
DOI: 10.6084/m9.figshare.19928861
title: Physico-chemical characterization of espresso coffee beverage prepared from blends of arabica and conilon coffees

description: In recent years, there has been a growing interest for exquisite beverages such as espresso coffee. Espresso coffee requires a high content of the aqueous extract to ensure a good body of the beverage, which can be obtained using coffee conilon. Espírito Santo State is the largest producer of conilon coffee in Brazil. Although there are several studies on the physico-chemical composition of Brazilian coffee, there is a lack of information about the use of conilon from Espírito Santo in the formulation of blends with Arabica coffee, as well as the physico-chemical characteristics of espresso coffee beverage obtained with these blends. The objective of this study was to carry out the physico-chemical characterization of espresso coffee beverage made from blends of arabica and conilon coffees (in arabica and conilon proportions of 100:0; 80:20; 60:40; 40:20 and 0:100, respectively) with different types of processing (dry process and semi dry process) produced in Espírito Santo. The variables moisture, pH, titratable acidity and aqueous extract of the samples were analyzed. It was found that the use of conilon in blends with Arabica, in the two forms of processing, results in beverages with higher levels of pH, lower acidity and higher percentage of aqueous extract. A higher percentage of aqueous extract is interesting for the preparation of espresso coffee. The results demonstrate the feasibility of using conilon coffee in blends with Arabica coffee in brewing espresso coffee, when a higher aqueous extract beverage is desired.
DOI: 10.6084/m9.figshare.19928863
title: Induction, morphologic and ultra-structural analyses of native passion fruit calluses

description: Analysis of calluses with embryogenic characteristics is important for subsequent in vitro regeneration of species with desirable agronomic traits such as the Passiflora gibertii native passion fruit. In this context, the present study aimed to analyze the induction of calluses from leaf explants of Passiflora gibertii N. E. Brown, as well as their morphologic and ultra-structural characterization. Cotyledonary leaves were inoculated in culture medium containing 2,4-D and picloram in association with kinetin. After 30 days of cultivation in the dark, the obtained calluses were prepared for the visualization in electron microscope (transmission and scanning) and light microscope. The results allowed to infer that the addition of picloram and kinetin to the culture medium promotes higher callus formation in cotyledonary leaf explants of P. gibertii than 2,4-D and kinetin. The growth regulator 2,4-D provides the formation of calluses with small isodiametric cells and small intercellular spaces, an organized cellular system and the predominance of round shaped mitochondria. Predominance of large and elongated cells with intercellular spaces, a non-organized cellular system and predominance of elongated mitochondria was observed when picloram was used.
DOI: 10.6084/m9.figshare.19928863.v1
title: Induction, morphologic and ultra-structural analyses of native passion fruit calluses

description: Analysis of calluses with embryogenic characteristics is important for subsequent in vitro regeneration of species with desirable agronomic traits such as the Passiflora gibertii native passion fruit. In this context, the present study aimed to analyze the induction of calluses from leaf explants of Passiflora gibertii N. E. Brown, as well as their morphologic and ultra-structural characterization. Cotyledonary leaves were inoculated in culture medium containing 2,4-D and picloram in association with kinetin. After 30 days of cultivation in the dark, the obtained calluses were prepared for the visualization in electron microscope (transmission and scanning) and light microscope. The results allowed to infer that the addition of picloram and kinetin to the culture medium promotes higher callus formation in cotyledonary leaf explants of P. gibertii than 2,4-D and kinetin. The growth regulator 2,4-D provides the formation of calluses with small isodiametric cells and small intercellular spaces, an organized cellular system and the predominance of round shaped mitochondria. Predominance of large and elongated cells with intercellular spaces, a non-organized cellular system and predominance of elongated mitochondria was observed when picloram was used.
DOI: 10.6084/m9.figshare.19928866
title: Nitrogen and potassium fertilization on the yield and intensity of the maize white spot

description: A plant's nutritional balance can influence its resistance to diseases. In order to evaluate the effect of increasing doses of N and K on the yield and severity of the mayze white spot, two experiments were installed in the field, one in the city of Ijaci, Minas Gerais, and the other in the city of Sete Lagoas, Minas Gerais. The experimental delimitation was in randomized blocks with 5 x 5 factorial analysis of variance, and four repetitions. The treatments consisted of five doses of N (20; 40; 80; 150; 190 Kg ha-1of N in the experiments 1 and 2) and five doses of K (15; 30; 60; 120; 180 Kg ha-1of K in experiment 1 and 8.75; 17.5; 35; 50; 100 Kg ha-1of K in experiment 2). The susceptible cultivar 30P70 was planted in both experiments. The plot consisted of four rows 5 meters long, with a useful area consisting of two central rows 3 meters each. Evaluations began 43 days after emergence (DAE) in the first experiment and 56 DAE in the second one. There was no significant interaction between doses of N and K and the disease progress P+. The effect was only observed for N. The K did not influence the yield and the severity of the disease in these experiments. Bigger areas below the severity progress curve of the white spot and better yield were observed with increasing doses of N. Thus, with increasing doses of N, the white spot increased and also did the yield.