Resultados de búsqueda - "field experiment"

Bridging the gap: how can information access and exchange between conservation biologists and field practitioners be improved for better conservation outcomes? por Sunderland, Terry C.H., Sunderland-Groves, J., Shanley, P., Campbell, Bruce M.

“…In turn, field practitioners rarely document their field experiences and experiments in a manner that can meaningfully inform conservation scientists. …”
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A field evaluation using the (15)N isotope dilution method of lines of Phaseolus vulgaris L. bred for increased nitrogen fixation por Kipe-Nolt, Judith A., Giller, Kenneth E.

“…N2 fixation in lines of Phaseolus vulgaris was measured by 15N-isotope dilution to determine whether a programme of crossing and recurrent selection had resulted in enhanced nitrogen fixation. In field experiments on an isohyperthermic Aquic Hapludoll soil the amount of N2 fixed by the different lines ranged from 18 to 36 kg ha?…”
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A new LandscapeDNDC biogeochemical module to predict CH4 and N2O emissions from lowland rice and upland cropping systems por Kraus, David, Weller, Sebastian, Klatt, Steffen, Haas, Edwin, Wassmann, Reiner, Kiese, Ralf, Butterbach-Bahl, Klaus

“…The new module is applied in combination with further modules simulating microclimate and crop growth and evaluated against observations from field experiments. Results The model simulations agree well with observed dynamics of CH 4 emissions in paddy rice depending on changes in climatic conditions and agricultural management. …”
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Precision of farmerbased fertility ratings and soil organic carbon for crop production on a Ferralsol por Musinguzi, P., Ebanyat, Peter, Tenywa, J.S., Basamba, T.A.A., Tenywa, M.M., Mubiru, D.

“…A study was conducted on Ferralsols in Uganda to evaluate farmer-based soil fertility assessment techniques, hereafter referred to as farmers' field experiences (FFE), for ease of use and precision, against more formal scientific quantitative ratings using soil organic carbon (SQR-SOC). …”
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Effects of plant density on the performance of cowpea in Nigerian Savannas por Kamara, A., Tofa, A.I., Kyei-Boahen, S., Solomon, R., Ajeigbe, Hakeem A., Kamai, N.

“…This corresponds to plant population of 133333 plants ha−1, which may not be sufficient for optimal cowpea yield. Field experiments were conducted to determine plant density effects on cowpea performance in the Northern Guinea and the Sudan savannas of Nigeria and also to determine if genotypes varied in their response to plant density. …”
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Effects of planting date, cultivar and insecticide spray application for the management of insect pests of cowpea in northern Ghana por Abudulai, M., Kusi, F., Seini, S.S., Seidu, A., Nboyine, J.A., Larbi, Asamoah

“…Insect pests are a major constraint to cowpea production in northern Ghana where it is widely cultivated. Field experiments were conducted to evaluate the effects of planting date, cultivar and insecticide applications for the management of major insect pests attacking cowpea. …”
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Selective control of weeds in an arable crop by mulches from some multipurpose trees in southwestern Nigeria por Kamara, A.Y., Akobundu, I.O., Jutzi, S.C.

“…However, previous studies mostly evaluated the contribution of mulch to soil improvement and rarely examined the effect of mulch on weeds. Field experiments were conducted during the 1995 and 1996 growing seasons to investigate the effects of mulch from three woody fallow species on weed composition, biomass and maize grain yield. …”
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Genetic sources and loci for wheat head blast resistance identified by genome-wide association analysis por Lei Wu, Xinyao He, Kabir, Muhammad Rezaul, Roy, Krishna K., Anwar, Md. Babul, Marza, Felix, Yi He, Peng Jiang, Xu Zhang, Singh, Pawan Kumar

“…A panel of 266 bread wheat accessions from China, CIMMYT-Mexico and other countries was screened for head blast resistance under 12 field experiments in Bolivia and Bangladesh. Subsequently, a genome-wide association study was performed to understand the genetic basis of wheat blast resistance. …”
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Testing the applicability of soil erodibility nomogram for some tropical soils por Vanelslande, A., Rousseau, P., Lal, R., Gabriels, D., Ghuman, B.S.

“…Soil erodibility measurements using field runoff plots were made for three contrasting soils in Nigeria. Field experiments were conducted over a period of 3 years from 1980 to 1983. …”
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Suppression of Lolium multiflorum Lam. with Vicia villosa Roth combined with residual herbicides por Renzi Pugni, Juan Pablo, Pérez Aagaard, Cristián, Chantre Balacca, Guillermo Ruben, Gigon, Ramon, Reinoso, Omar Juan, Quintana, Matias, Ducos, I., Cantamutto, Miguel Angel

“…Increasing herbicide resistance cases have exacerbated the problem, requiring alternative control options based on an Integrated Weed Management approach (IWM). Field experiments were conducted in the south area of Buenos Aires province during 2017-2019 in order to evaluate both the suppressive effect of Vicia villosa (hairy vetch) over annual ryegrass when combined with residual herbicides, and the tolerance of the former to such herbicides. …”
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Seedling emergence and herbage yield of summer‐active tall fescue sown at different times and sowing depths por Beribe, Maria Jose, Barletta, Pablo Fernando, Scheneiter, Jorge Omar

“…Since tall fescue is sensitive to the sowing depth, and temperature determines the emergence period, this study aimed to evaluate the effect of sowing depth at different times on seedling emergence and herbage yield. Methods: Two field experiments were carried out in Pergamino, Buenos Aires province, Argentina, to evaluate a summer-active tall fescue at two sowing times and five sowing depths. …”
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Wheat spike fertility : inheritance and relationship with spike yield components in early generations por Martino, Diana Laura, Abbate, Pablo Eduardo, Cendoya, Maria Gabriela, Gutheim, Florencia, Mirabella, Nadia Estefania, Pontaroli, Ana Clara

“…The aim of this study was to determine the heritability of SF and the effect of early selection for high SF on its relationship with other spike yield components. Two field experiments were conducted in the south-eastern Pampas (Argentina) with 400 F2 and F2:3 families obtained from two crosses between varieties with contrasting SF (PIG/SSN and B10/KCJ). …”
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Glyphosate resistance in perennial ryegrass (Lolium perenne L.) is associated with a fitness penalty por Yanniccari, Marcos Ezequiel, Vila-Aiub, Martín Miguel, Istilart, Carolina Maria, Acciaresi, Horacio Abel, Castro, Ana Maria

“…The fitness of glyphosate-resistant and -susceptible perennial ryegrass plants selected from within a single population were studied in two field experiments conducted during 2011 and 2012 under different soil water availability. …”
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An autoparasitoid wasp, inferior at resource exploitation, outcompetes primary parasitoids by using competitor females to produce males por Marrao, Rosalina, Frago, Enric, Pereira, José A., Tena, Alejandro

“…Autoparasitoids are intraguild consumers that attack and kill heterospecific and conspecific parasitoids as well as immature stages of hemipteran hosts, such as aphids, whiteflies and soft scales. Field experiments assessing the importance of interspecific competition between autoparasitoids and primary parasitoids, as well as its impact on herbivore suppression, are scarcely found in the ecological literature. 2. …”
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Nodulation and estimation of symbiotic nitrogen fixation by herbaceous and shrub legumes in Guinea Savanna in Nigeria por Sanginga, N., Wirkom, L.E., Okogun, A., Akobundu, I.O., Carsky, R.J., Tian, G.

“…Twelve herbaceous and shrub legume species were grown in pot and field experiments in five sites representing three agroecological zones in moist savanna in Nigeria. …”
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A Climate Smartness Index (CSI) Based on Greenhouse Gas Intensity and Water Productivity: Application to Irrigated Rice por Arenas Calle, Laura N., Whitfield, Stephen, Challinor, Andrew J.

“…The CSI presented here has been developed for application in a systematic review of rice irrigation strategies and it combines normalized water productivity (WP) and greenhouse gas intensity (GHGI) The CSI was developed for application to data from published field experiments that assessed the impact of water management practices in irrigated rice, focusing on practices heralded as climate-smart strategies, such as Alternate Wetting and Drying (AWD). …”
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Scaling community seedbanks and farmer seed enterprises in East and Southern Africa: Workshop Highlights, 2-4 October 2019, Entebbe, Uganda por Adokorach, Joyce, Vernooy, Ronnie, Kakeeto, Ronald

“…Presentations on pratical field experiences from Uganda were made (including demonstrations of seed collections) by the Soroti Community Seed Bank, and the Joy and Family demonstration farm in Ngoma, Kiziba, Kagano-Sheema. …”
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Assessing the potential of extra-early maturing landraces for improving tolerance to drought, heat, and both combined stresses in maize por Nelimor, C., Badu-Apraku, Baffour, Tetteh, A.Y., Garcia-Oliveira, A.L., N’guetta, A.S.P.

“…The objective of this study was to identify extra-early maize landraces that express tolerance to drought and/or heat stress and maintain high grain yield (GY) with other desirable agronomic/morpho-physiological traits. Field experiments were carried out over two years on 66 extra-early maturing maize landraces and six drought and/or heat-tolerant populations under drought stress (DS), heat stress (HS), combined both stresses (DSHS), and non-stress (NS) conditions as a control. …”
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Sensitivity and tolerance of different annual crops to different levels of banana shade and dry season weather por Blomme, Guy, Ntamwira, Jules Bagula, Kearsley, Elizabeth, Bahati, Liliane, Amini, Daniel, Safari, Nancy, Ocimati, Walter

“…This study, through extensive field experiments performed in South Kivu, DR Congo investigated the resilience of a wide range of food and forage crops to varying banana shade levels. …”
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Phenotyping of productivity and resilience in sweetpotato under water stress through UAV-based multispectral and thermal imagery in Mozambique por Ramírez, D., Grüneberg, W.J., Andrade, M.I., Boeck, B. de, Loayza, H., Makunde, G.S., Ninanya, J., Rinza, J., Heck, S., Campos, Hugo

“…In this study, airborne imagery based on reflectance (NDVI, CIred-edge) and canopy temperature minus air temperature (dT) indices was used to characterize sweetpotato genotypes under drought treatments in Mozambique. Two field experiments established in rainy/hot (Trial A) and dry/cool (Trial B) seasons were assessed. …”
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