bluuebunny/crossref_metadata_2025_split huggingface dataset:
Variability of soil mineralogical composition in Sentra Bareh Solok paddy field as affected by eruption material from Mt. Talang
Authors: Suryani E , Subandiono R E , Yatno E , Hikmat M , Husnain  , Anda M 
Published: February 2021

Abstract
Mt. Talang is one of the active volcanoes in West Sumatra with the last eruption occurred in 2017. The Sentra Bareh Solok paddy field distributed from volcanic middle slope to Singkarak Lacustrine Plain. The composition of sand mineral fraction of nine representative of soil profiles has been analysed using polarization microscope with line counting method. Results show that mineralogical composition are the same, but the amount are different. At the volcanic middle slope, opaque is dominant. It is probably due to thermal formation associated with the melting of existing iron oxides attributed by lava flow. Labradorite and hypersthene are dominant in Alluvial Plain and it could indicate rather slow weathering processes. While, the soils at Lacustrine Plain were dominated by volcanic glass and labradorite and it could be due to silica saturation; more cations and higher pH of soil solution hindering dissolution of minerals. The K-bearing minerals were absent in all soils, indicating K would be the problem as revealed by low K content and its trend decreased from middle slope to the lacustrine. The implication is soils in the Lacustrine Plain and Alluvial Plain would need more K fertilizers than soils in the middle slope.
Identified diseases would threaten on the expansion of Amorphophallus muellery Blume cultivation in Indonesia
Authors: Soedarjo M , Djufry F 
Published: February 2021

Abstract
As one of the important agribusiness crops, Amorphophallus muelleri Blume’s cultivation areas, locally known as “porang”, have significantly increased in the past recent years. The increase in cultivation area has been triggered by the significant rise of corm price and by the government program for enlargement of the porang cultivation. Consequently, farmers would eventually grow the porang on open agricultural land. As a result of cultivation expansion, an increase in corm production is required to meet export demand. Like other tuber crops, which have been cultivated on large and open areas in Indonesia, the porang plant would similarly experience severe damage and even a failure of harvest due to the diseases. The present field observation found infections caused by fungi (Phytophthora colocasia and Sclerotium rolfsii) and a plant virus significantly reduced the corm yield. The paper presented the first report of the diseases on the porang plant. Thus, the expansion of the porang cultivation area in Indonesia would be challenged by the infestation of these diseases.
Application of remediation treatment to reduce lead in the soil of shallot cropping
Authors: Purbalisa W , Zulaehah I , Paputri D M W 
Published: February 2021

Abstract
One of the pollutants on agricultural land is lead (Pb). Remediation is an effort to reduce contamination of heavy metals in agricultural soils. This study aimed to determine lead content in the soil through remediation with plus treatment. The study conducted at screen house on a pot scale using a completely randomized design with three replications and nine treatments, i.e. control/without organic fertilizer (P0), compost (P1), biochar+compost (P2), nanobiochar+compost (P3), nanobiochar+compost+consortia bacteria (P4), compost+consortia bacteria (P5), biochar+compost+consortia bacteria (P6), biochar+compost+botanical pesticide (P7) and biochar+compost+biological agents (P8). Biochar+compost (1:4) applied as basal fertilizer with dose of 2.5 t ha−1. Parameters observed were lead content in the soil at 7 DAA, 37 DAA and harvest, lead content in shallot plants (leaves and tubers) after harvest. Lead analysis used wet ashing method measured by AAS. The results showed the levels of lead metal in soil decreased from time to time except in compost treatment, while the levels of lead metal in shallots were still below of critical limit ≤ 0.5 mg kg−1. P3 treatment has potential to increase productivity while P4 and P0 could reduce lead soil higher than other treatment.
Variability of harvest time of vegetable at different four altitudes based on heat unit analysis
Authors: Suciantini  , Pramudia A 
Published: February 2021

Abstract
The concept of heat unit or degree days for a seasonal crop is calculated from the planting until harvest. Heat unit analysis can help in determining the optimum harvest time. The purpose of this paper was to determine the harvest time for tomato, chili, cucumber, and shallot based on the accumulation of heat unit in different altitudes, such as 8 m (low), 207 m (low), 517 meters (medium) and 920 meters above sea level (high). The heat unit (HU) = (Tavg
-Tbase
) *age of each phase. The reference cumulative value of the heat unit at harvest as follows; tomato is 1,661°C days, chili is 1,690°C days, cucumber is 979.8°C days and shallot is 945.8°C days. Based on the analysis, it is known that in the lowlands the harvest is faster than in the highlands because heat accumulation is achieved more quickly. The harvest time in lowland and highland was vary, as follows; around 41-66 days on tomatoes, 41-66 days on chilies, 30-37 days on cucumbers, and 29-36 days on shallots. By knowing the span of harvest time, it is hoped that the planting schedule for these vegetables will be adjusted to the needs and location.
Identification of cobalt in paddy fields in Karawang and Bekasi Districts
Authors: Paputri D M W , Handayani C O , Sukarjo  , Rianto S , Purnariyanto F 
Published: February 2021

Abstract
Plants need cobalt (Co) for nitrogen fixation and encourage seedling growth. If the amount is excessive, cobalt causes a reduction in crop yield and poisoning. This study aims was to monitor the toxicity levels of cobalt in paddy fields. The study was conducted in the lowland rice fields of Karawang and Bekasi regencies by taking 394 samples of topsoil. The soil samples were collected by survey method. The analysis showed that all samples contained total cobalt, ranging from 0.477 to 31.829 ppm. The data is classified into 3 classes, namely: normal, normal-toxic and toxic under the quality standards of heavy metals in the soil [7]. The classification results showed that 391 samples are categorized as the normal class, 3 samples as the normal-toxic class, and there was no sample categorized as toxic class. The results of this study can be use as a reference for stakeholders to conduct land management to avoid cobalt poisoning.
Composition of media that promotes seedling growth and root nodules of dog fruit (Pithecellobium lobatum Benth)
Authors: Emilda D , Andini M , Martias  , Hariyanto B , Sunyoto  
Published: February 2021

Abstract
A study aimed to find out the best medium to promote plant growth and the presence of root nodules of dog fruit seedlings was conducted at Indonesian Tropical Fruit Research Institute (ITFRI) from September 2017 to April 2018. This research was arranged in a randomized block design with 10 treatments and 3 replications. The treatments were 10 compositions of media that consisted of a control medium (soil:cow manure = 1:1 v/v) and 9 other combinations of two or three materials, namely: soil, cow manure, compost, and rice husk charcoal with a ratio of 1:1 (v/v) without and with the addition of mycorrhizae. The results showed that the best media to promote dog fruit seedling growth was soil:rice husk charcoal 1:1 (v/v) and the highest number of root nodules was also found in this medium composition. There was no significant growth difference in dog fruit seedlings at 6 months after planting due to the addition of mycorrhizae. The result of this study can be considered in the selection of medium for better seedling growth of dog fruit.
Identification of organochlorine insecticide contamination on shallots land in Nganjuk Regency, East Java Province, Indonesia
Authors: Indratin  , Wahyuni S , Poniman  , Sutriadi M T 
Published: February 2021

Abstract
The high and excessive use of pesticides is reported to have contamination shallot agriculture in Nganjuk Regency, East Java Province, Indonesia. Information on the presence of organochlorine residues needs to be carried out in the context of controlling environmental contamination as a form of implementing a national food security and security program. The purpose of this study was to identify organochlorine residues in shallot land in Nganjuk Regency. Soil samples from the field were taken in March 2020. Soil samples were taken at random diagonally on a stretch of shallot agriculture. Each overlay represents a sampling point. Organochlorine residue analysis was carried out at the Integrated Laboratory, Indonesian Agricultural Environment Research Institute (IAERI) using the QuECheRS method. The results showed that the residual of the organochlorine active ingredient of Endosulfan reaches 0.1066 to 0.1646 mg kg−1, Dieldrin reaches 0.181 mg kg−1 and Endrin reaches 0.2249 mg kg−1. These residual numbers have exceeded the MRLs requirements approximately 0.0085 mg kg−1 (Endosulfan), 0.00290 mg kg−1 (Dieldrin) and 0.0075 mg kg−1 (Endrin). These results showed that pollute agricultural land need to get priority on land remediation for sustainable agriculture.
Study of the utilization of ex-tin mining land for agriculture: analysis of land potential and constraints faced
Authors: Agustian A , Ariningsih E , Indraningsih K S , Saliem H P , Suryani E , Susilowati S H , Gunawan E 
Published: February 2021

Abstract
The reclaimed ex-mining land has the potential for agricultural development. This study aims to analyze the potential of existing tin mining land for agricultural purposes and identify the current ex-mining land status and constraints/problems in its utilization. The study was conducted in Bangka Belitung Province in 2016, with a sample of farmers who took part in ex-tin mining activities and official respondents from various institutions/agencies related to the study. Data were analyzed quantitatively and qualitatively. The study results show that in the research site, the tin mining business permit (IUP) area (in 2012) was 473.99 thousand ha and around 7,000 ha of ex-mining land has been reclaimed and allowed for planting food crop commodities. However, the community faces several problems in using the ex-mining land, namely land legal status, soil fertility, farmer resource availability, farmers’ skill in farming on ex-mining land and limited farming capital. The clarity of the legal status of the use of ex-mining land is essential to support community interest and increase the use of ex-tin mining land as well as program support from the government in the form of assistance and infrastructure for farming development.
The application of solar water pump for drip irrigation to increase shallot yield on dry land
Authors: Rejekiningrum P , Apriyana Y , Harmanto  
Published: February 2021

Abstract
Solar Water Pump Irrigation System (SIPTS) is a renewable energy to solve water problem in agriculture. SIPTS could reduce greenhouse gas emissions and draw water to agricultural lands through supplementary irrigation. The objectives of research are to design a SIPTS for drip irrigation and to calculate the irrigation efficiency of SIPTS and GHG emission reduction. The results of the study indicate that the use of SIPTS could save fuel consumption from 70 to 14 L ha−1 season−1, resulting in a savings of 400%. Furthermore, the use of SIPTS could reduce GHG emissions originating from the use of hydrocarbon materials from 0.176 to 0.035 t of CO2 which is more environmentally friendly. In addition, the results of water content analysis show that the use of SIPTS with streamline drip irrigation has relatively higher water content than that of farmers’ irrigation practices, this indicates that irrigation system is more effective in distributing water horizontally and vertically. Likewise, plant growth and shallot yield represented indicate higher growth and yield compare to farmers’ practices.
Effects of rice cultivar on the net greenhouse gas emission under continuous flooding and alternate wetting and drying irrigations in paddy field
Authors: Pramono A , Adriany T A , Susilawati H L , Sutriadi M T 
Published: February 2021

Abstract
Rice production has been challenged by increasing food demand and water scarcity. Alternate wetting and drying (AWD) irrigation is a water-saving irrigation technique for paddy fields. The aim of this research was to determine the effects of rice cultivars on the net greenhouse gas emission under continuous flooding (CF) and AWD irrigations in paddy field. This experiment used randomized complete block design with combination of the water management systems and rice cultivars. There were two water management systems, namely (1) CF and (2) AWD irrigations and three rice cultivars, namely (1) Ciherang, (2) Inpari 32, and (3) Mekongga. The results showed that the AWD irrigation decreased global warming potential by 51%, 40% and 19% when combined Ciherang, Inpari 32 and Mekongga, respectively, compared to CF. The combination of AWD irrigation and Inpari 32 rice cultivar resulted the highest net GHG balance among all treatments approximately 7.9 t ha−1 and also showed the highest profit around IDR 18.3 million ha−1. This study clearly suggested the possibility of reducing GHG emission from the paddy field through appropriate selection of water management and rice cultivars to achieve a technically and economically feasible as a mitigation option.
Rainwater harvesting technology to increase cropping index under perennial crops
Authors: Heryani N , Kartiwa B , Hamdani A , Muhardiono I , Rahayu B , Purwaningasih  
Published: February 2021

Abstract
Spatial and temporal water availability uncertainties are the major constraints to dryland crops productivity. Comprehensive hydrologic survey to determine water harvesting location as supplementary irrigation source is the key to increase dryland cropping index. This research was conducted in Lampung during April to December 2019. The aims of this research were to develop water management designs and irrigation techniques for upland rice and maize cultivation under perennial crops. The applied irrigation techniques consisted of sprinkler, furrow, and hose spray, while 3 varieties of the used upland rice were Rindang 1, Rindang 2, and Inpago 10. Results of this research revealed differences in crop productivity between paddy under “sengon” and rubber. This finding suggests supplement irrigation requirement from water harvesting infrastructures to increase land productivity during dry season. Moreover, the percentage of tolerable shading was up to 50% or 3 year age of the perennial crops.
Greenhouse gas emissions reduction and rice yield potential under bio-fertilizer application
Authors: Yulianingsih E , Pramono A , Setyanto P , Sugiarto  
Published: February 2021

Abstract
Rice cultivation is one of the largest contributors of CH4 emission to the atmosphere. It contributes approximately 5 to 19% of the total global CH4 emissions. The aim of this research was to investigate the effect of using of bio-fertilizers on greenhouse gas (GHG) emissions and rice yield. The experiment was conducted from September 2016 to January 2017 in experimental station of Indonesian Agricultural Environmental Research Institute, Pati Central Java. This experiment used completely randomized design with three treatments and five replications. The treatments were (1) no amendments (control), (2) rice straw 3 t ha−1 and (3) rice straw 3 t ha−1 + bio-fertilizer 10 L ha−1. The CH4, CO2, and N2O gas fluxes were measured weekly during the rice-growing season by using closed chamber method. The results of this study showed that application of straw + bio-fertilizers treatment reduced GHG emissions of CH4, N2O, and CO2 by 9.2, 14.78, and 27.68%, respectively compared to the application of straw treatment. The application of straw + bio-fertilizers treatment decreased global warming potential (GWP) by 10.75% compared to the application of straw. The GHG index (GHGI) of straw + bio-fertilizer treatment decreased 8.27% compare to control. The results suggested that application of bio-fertilizer could support environmentally agriculture in supporting food self-sufficiency.
Developing the swamp planting calendar based on the hydrological model application
Authors: Adi S H , Kartiwa B , Apriyana Y , Sosiawan H , Rejekiningrum P , Gumilar G 
Published: February 2021

Abstract
Determining the beginning of rice planting period is an important cultivation strategy in Indonesia, influenced by climate anomalies. On swamps, the beginning of planting period depends on local rainfall patterns, upstream rainfall, discharge, and water level dynamics. This article presents hydrological model application in developing planting calendar for non-tidal swamp agricultural land. The research location was in Tanjung Alai Village, Padang, Ogan Komering Ilir, South Sumatra. This research analyzed multi-variable hydrological data during 1999-2000 period. River discharge was simulated using GR2M model, while land surface elevation dynamic was analyzed using water balance approach. Model parameters included rainfall, evapotranspiration, percolation, river water level, outflow, and inundation level. Results of this study showed the GR2M model calibration between the measured and the Ogan River discharge data had 65% similarity level. The water balance analysis result showed the flooded lands to occur during the decade periods of Jan I to May II, when Ogan River water elevation was between 6.21 and 10.43 m asl. Water balance simulation identified the optimum planting periods were between the decade of May III to July III, when Ogan River water elevation was between 6.73 and 8.83 m, and land water level ranged from 14.96 to 29.56 cm.
Utilization of organic fertilizer in response to mitigate CO2 emission
Authors: Widiastuti D P , Marzuki S U , Hatta M 
Published: February 2021

Abstract
Food security and sovereignty are strategic policy agenda of national security. Accelerating the growth of sustainable food production and improving the welfare of farmers through optimization of land resources are the priority. One way to increase food production and enhance soil quality is through the utilization of organic fertilizers such as livestock waste. In addition, it is expected to reduce CO2 emissions rather than leaving manure untreated. The purpose of this study was to determine the effect of solid manure and biourine application on increasing maize production and mitigate CO2 emission. This study was conducted in Inceptisols Rasau Jaya II, West Kalimantan. A randomized complete block design trial was established from plots fertilized with solid organic fertilizer (PO), biourine (BIO), solid organic fertilizer+biourine (PO+BIO), and control, with five replications. Parameters observed in this study were CO2 flux and agronomic performance of maize. CO2 emission was measured using the static chamber method, placing chambers on the surface of the soil and taking measurements using an infrared gas analyzer for 125 days. CO2 fluxes ranged from 59.93 to 106.07 Mg ha-1 yr-1 and there was no significant difference among the organic fertilizer treatments; nevertheless, the lowest CO2 flux was illustrated in PO+BIO. Maize productivity was influenced by the organic fertilizer and PO+BIO had the greatest maize yield.
Remediation of arsenic-contaminated soil by chelating agents in shallot plantation land in Bima, West Nusa Tenggara
Authors: Zu’amah H , Hidayah A , Ardiwinata A N , Paputri D M W , Purbalisa W 
Published: February 2021

Abstract
Arsenic (As) contaminated agricultural land in Bima is due to the use of synthetic fertilizers and excessive pesticides in the shallot cultivation system. One of the efforts to remediate the contaminated soil by using the chelating agent. The research aims to study the ability of various chelating agents to remediate As contaminated soil and also examined the effect of chelating agents on arsenic concentration in shallot bulbs and production. The study was conducted at the shallot production center of Kalampa Village, Woha Subdistrict, Bima Regency, West Nusa Tenggara, which indicated As contamination. The experiment used a randomized block design with three replication and five chelating agents i.e. biochar-compost, chitosan, EDTA, ammonium thiosulfate, zeolite, and control. All treatment of chelating agents can reduce As in the soil up to 70% and significantly different with control. Arsenic content in shallot bulbs with chelating agents treatment is within the safe limit (<1 mg kg−1). Biochar-compost significantly increased the shallot yield. Meanwhile, EDTA treatment did not support shallot production. Biochar-compost and zeolite are recommended for application due to their ability to remediate arsenic in the soil, the lowest concentration of arsenic in shallot bulbs, and the ability to support optimal shallot production.
Soil amelioration using steel slag in drained peatland under oil palm plantation increases CO2 emission
Authors: Marwanto Setiari 
Published: February 2021

Abstract
Increasing the productivity of tropical peatland can be achieved by soil ameliorations using steel slag and lateritic soil. However, the effect of such ameliorants on the peat decomposition is not well understood. This study was aimed to evaluate the influence of soil ameliorants of steel slag and lateritic soil to peat decomposition as reflected by CO2 emission. A year study was conducted in smallholder oil palm plantation in Jambi Province, Indonesia to monitor CO2 emission from treatments plots of control (T1), steel slag 600 kg ha−1 (T2), lateritic soil 600 kg ha−1 (T3) and a combination of T2 and T3 (T4), which each treatment had 5 replications. CO2 emission was measured every three months by a closed chamber method. Results showed that CO2 emission were followed the order of T4>T2>T1≥T3. CO2 emission from T4 (49 ± 20 t ha−1 year−1) was 20% higher than T1 (40 ± 23 t ha−1 year−1), while T2 (44 ± 17 t ha−1 year−1) was 9% higher than T1. CO2 emission from T3 (40 ± 14 t ha−1 year−1) was similar to T1. This study showed that steel slag accelerates peat organic matter decomposition which is indicated by higher CO2 emission of steel slag treatments compare to other treatments.
Impact of methane-utilizing bacteria on rice yield, inorganic fertilizers efficiency and methane emissions
Authors: Pratiwi E , Akhdiya A , Purwani J , Husnain  , Syakir M 
Published: February 2021

Abstract
Methane (CH4) is one of the greenhouse gases that contribute to climate change. Lowland rice cultivation is one of the main sources of methane emissions, accounting for around 5 to 19% of total global CH4. One of the efforts to reduce CH4 gas emissions that is environmentally friendly is through methane-utilizing bacteria. This study aimed to determine the effect of methane-utilizing bacteria on rice yield and methane emissions. The bacterial strains used were Mycobacterium senegalense LM1, Providencia stuartii LM18, Rhizobium rhizoryzae BMU, and Bacillus methylotrophicus N2P4. The research was conducted in the experimental field of The Indonesian Center for Rice Research, Bogor, Indonesia. The experiment was carried out by using a factorial randomized block design with two factors and three replications. The first factor was the dose of NPK inorganic fertilizer (50%, 75%, 100%). The second factor was bacterial consortium formulas (without bacteria, bacterial consortium 1, bacterial consortium 2). The application of a bacterial consortium containing all strains increased the efficiency of inorganic fertilizers by 25%, increased rice production by 33.55%, and reduced CH4 emissions by 37.26%. It seems that the consortium of methane-utilizing bacteria has the prospect of biofertilizer and mitigation agents to mitigate the impact of global warming.