Resultados de búsqueda - "field experiment"

Direct estimation of maize leaf area index as influenced by organic and inorganic fertilizer rates in Guinea Savanna por Berdjour, A., Dugje, I., Rahman, N.A., Odoom, D.A., Kamara, A., Ajala, S.

“…Using a split-plot design with three replications, a field experiment was conducted to determine the effects of three PM rate (0, 2 and 4 t/ha) as main plot and three NPK rate (0:0:0, 60:30:30 and 120:60:60 kg N P2O5 K2O/ha) as sub plot, on LAI and maize grain yield. …”
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Using AquaCrop as a Decision-Support Tool for Small-Scale Irrigation Systems Was Dictated by the Institutional and Market Incentives in Ethiopia por Biazin, B., Wondatir, S., Tilahun, G., Asaro, N., Amede, T.

“…We used potato (Solanum tuberosum) to demonstrate AQUACrop as a tool for improving water productivity during Belg (short) and Meher (long) rainfall seasons. A field experiment was undertaken using supplementary irrigation at different levels of potato crop water satisfaction (50% ETc, 75% ETc, 100% ETc and rainfed conditions) during the Belg (February–May 2020) and Meher (July–October 2020) seasons. …”
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African nightshade and African spinach decrease root-knot nematode and potato cyst nematode soil infestation in Kenya por Chitambo, O., Haukeland, Solveig, Fiaboe, K.K., Grundler, F.M.

“…Therefore, we studied the dynamics of RKN and PCN on A. dubius, A. cruentus, S. scabrum, and S. villosum over 2 years in a field experiment. The effects of AIV crop species on RKN and PCN soil infestation were evaluated using susceptible S. lycopersicum or S. tuberosum. …”
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Enforcement and inequality in collective PES to reduce tropical deforestation: Effectiveness, efficiency and equity implications por Naime, J., Angelsen, A., Molina Garzón, A., Carrilho, C.D., Selviana, V., Demarchi, G., Duchelle, Amy E., Martius, C.

“…We conducted a framed field experiment in Brazil, Indonesia and Peru to evaluate how three different strategies to contain the local free-rider problem perform in terms of the 3Es: (i) Public monitoring of individual deforestation, (ii) internal, peer-to-peer sanctions (Community enforcement) and (iii) external sanctions (Government enforcement). …”
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Identification of genomic loci regulating grain iron content in aus rice under two irrigation management systems por Talukdar, Partha, Travis, Anthony J., Hossain, Mahmud, Islam, Mohammed Rafiqul, Norton, Gareth J., Price, Adam H.

“…In this study, 225–269 accessions of the Bengal and Assam Aus Panel (BAAP) were investigated for their accumulation of grain Fe in two consecutive years in a field experiment under alternative wetting and drying (AWD) and continuous flooded (CF) irrigation. …”
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Moroccan entomopathogenic nematodes as potential biocontrol agents against Dactylopius opuntiae (Hemiptera: Dactylopiidae) por El Aalaoui, Mohamed, Mokrini, Fouad, Dababat, Abdelfattah A., Lahlali, Rachid, Sbaghi, Mohamed

“…For the cochineal nymphs and adult females, no significant difference was observed among S. feltiae at 25, 50, and 75 IJs cm−2, and the positive control, D-limonene applied at 0.5 g/L which was used due to its high effectiveness against nymphs and females of D. opuntiae. In the field experiment, D-limonene at 0.5 g/L and S. feltiae applied at 75 IJs cm−2 were effective in reducing nymph and adult female populations by 85.3–93.9% at 12 days of post exposure period. …”
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Empowering women through targeting information or role models: Evidence from an experiment in agricultural extension in Uganda por Lecoutere, Els, Spielman, David J., Van Campenhout, Bjorn

“…We do this through a field experiment in eastern Uganda in which videos that provide information on recommended maize-farming practices are shown to monogamous maize-farming households. …”
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Phagotrophic protist-mediated control of polymyxa graminis in the wheat rhizosphere por Wu, Chuanfa, Ge, Chaonan, Wang, Fangyan, Zhang, Haoqing, Zhu, Zhenke, Lesueur, Didier Marcel Gerard, Yang, Jian, Chen, Jianping, Ge, Tida

“…Methods We designed a field experiment on wheat cultivars for virus-resistance identification and conducted metagenomic analysis to determine the potential mechanisms used by rhizosphere microbial communities that affect the density of the mosaic virus vector- Polymyxa graminis, and to identify potential microbes that inhibit virus transmission. …”
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Information and communication technologies to provide agricultural advice to smallholder farmers: Experimental evidence from Uganda por Van Campenhout, Bjorn, Spielman, David J., Lecoutere, Els

“…We evaluate the effectiveness of an ICT‐mediated approach to deliver agricultural information in a field experiment conducted among small‐scale maize farmers in eastern Uganda. …”
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Information and communication technologies (ICTs) to provide agricultural advice to smallholder farmers: Experimental evidence from Uganda por Van Campenhout, Bjorn, Spielman, David J., Lecoutere, Els

“…We evaluate the effectiveness of an ICTmediated approach to deliver agricultural information in a field experiment conducted among small-scale maize farmers in eastern Uganda. …”
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Payments discourage coordination in ecosystem services provision: Evidence from behavioral experiments in Southeast Asia por Bell, Andrew R., Zhang, Wei

“…We undertook a framed field experiment to examine the role of subsidies for non-crop habitat in improving insect-based ecosystem services in two separate samples in Southeast Asia—Cambodia and Vietnam. …”
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Deep sowing of dry direct-seeded rice: cultivar differences in seedling establishment and grain yield por Kanno, Noriko, Garcia, Ricardo, Suralta, Roel R., Corales, Aurora M., Bueno, Crisanta S., Banayo, Niño P.M.C., Sta. Cruz, Pompe C., Kumar, Virender, Kato, Yoichiro

“…Seedling’s ability to emerge after deep sowing greatly differed among cultivars: the percentage emergence ranging from 0% to 18% from a depth of 8 to 10 cm, and from 11% to 44% from a depth of 6 to 7 cm. An ancillary field experiment was conducted under drought during the dry season in the Philippines: deep sowing increased the percentage emergence compared with shallow sowing (41% vs. 5%), when the soil surface was severely dry. …”
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Identification of promising genotypes through systematic evaluation for arsenic tolerance and exclusion in rice (Oryza sativa L.) por Murugaiyan, Varunseelan, Ali, Jauhar, Frei, Michael, Zeibig, Frederike, Pandey, Ambika, Wairich, Andriele, Wu, Lin-Bo, Murugaiyan, Jayaseelan, Li, Zhikang

“…Seedling-stage screening was conducted in hydroponics under varying As stress to identify tolerant and excluder genotypes, and a field experiment was carried out to identify genotypes accumulating less As in grain. …”
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Carbon and nitrogen mineralization in dark grey calcareous floodplain soil is influenced by tillage practices and residue retention por Salahin, Nazmus, Alam, Md. Khairul, Ahmed, Sharif, Jahiruddin, Mohammad, Gaber, Ahmed, Alsanie, Walaa F., Hossain, Akbar, Bell, Richard W.

“…Very little is known about the changes that occur in soil organic carbon (SOC) and total nitrogen (TN) under an intensive rice-based cropping system following the change to minimal tillage and increased crop residue retention in the Gangetic Plains of South Asia. The field experiment was conducted for 3 years at Rajbari, Bangladesh to examine the impact of tillage practices and crop residue retention on carbon (C) and nitrogen (N) cycling. …”
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Assessing soil properties and nutrient availability under conservation agriculture practices in a reclaimed sodic soil in cereal-based systems of North-West India por Jat, H.S., Datta, Ashim, Sharma, P.C., Kumar, Virender, Yadav, A.K., Choudhary, Madhu, Choudhary, Vishu, Gathala, M.K., Sharma, D.K., Jat, M.L., Yaduvanshi, N. P. S., Singh, Gurbachan, McDonald, A.

“…Replacement of conventional management practices with conservation agriculture (CA) is required to improve soil quality. A field experiment was conducted to assess the effect of CA on soil physical (bulk density, penetration resistance, infiltration) and chemical (N, P, K, S, micronutrients) properties after 4 years in North-West India. …”
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Tillage and planting methods effects on yield, water use efficiency and profitability of soybean-wheat system on a loamy sand soil por Ram, Hari, Singh, Yadvinder, Saini, K.S., Kler, D.S., Timsina, J.

Materias: “…field experimentation…”
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Saving of water and labor in a rice-wheat system with no-tillage and direct seeding technologies por Bhushan, Lav, Ladha, Jagdish K., Gupta, Raj K., Singh, S., Tirol-Padre, A., Saharawat, Y.S., Gathala, M., Pathak, H.

“…We attempted to evaluate alternatives that would require smaller amounts of these two inputs. A field experiment was conducted in the IGP for 2 yr to evaluate various tillage and crop establishment systems for their efficiency in labor, water, and energy use and economic profitability. …”
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Nitrogen dynamics of various green manure species and the relationship to lowland rice production por Clément, Alain, Ladha, Jagdish K., Chalifour, François-P.

“…Published information on the influence of the chemical composition of GM on N dynamics in lowland rice (Oryza sativa L.) is scarce. A field experiment was conducted in the 1992 wet season (WS), the 1993 dry season (DS) and the 1993 wet season to compare GM species and urea as sources of N for rice, to monitor N release and uptake during the season, and to verify the effect of the chemical composition of GM on rice yield (including the residual effect on dry season rice). …”
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Nitrogen Losses and Lowland Rice Yield As Affected By Residue Nitrogen Release por Becker, M., Ladha, J.K., Ottow, J. C. G.

“…This hypothesis was tested under flooded lowland conditions in a three‐season field experiment. Leguminous green manures and rice straw with various lignin to N ratios (L/N) and urea were compared using N release, rice N uptake, N use efficiency, grain yield, and total 15N balance as criteria. …”
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Fertilizer-Nitrogen Use Efficiency Of Irrigated Wheat .2. Partitioning Efficiency Of Preplant Versus Late-Season Application por Wuest, S.B., Cassman, K.G.

“…This study evaluated the effects of N‐fertilizer treatments on N partitioning, and compared the partitioning of labeled N applied at planting with labeled N applied at anthesis. A 2‐yr field experiment was conducted with applications of 120, 180, or 240 kg N ha−1 at planting and 0, 30, or 60 kg N ha−1 at anthesis. …”
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