Resultados de búsqueda - "field experiment"

Evaluating the efficacy of biological control of three of three exotic homopteran pests in Tropical Africa por Neuenschwander, Peter

“…The impact was documented by (1) exclusion experiments; (2) long-term population dynamics studies; (3) laboratory and field experiments contributing to simulation models; and, most importantly, (4) quantitative results from large-scale surveys evaluated by multivariate analyses. …”
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Suitable management options to improve the productivity of rice cultivars under salinity stress por Mel, V.C., Bado, V.B., Ndiaye, S., Djaman, K., Nati, D.A.B., Manneh, B., Futakuchi, K.

“…Growing rice in saline soils by minimizing damage on growth and yield remains a challenge. We conducted field experiments in the Africa Rice research field located in the Senegal River delta (16° 11ʹ N, 16° 15ʹ W) to study the effects of three management options of fertilization e.g. …”
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Crop and soil organic matter simulation models – A brief review of their basic features and application in sub-Saharan Africa por Nyawira, Sylvia Sarah

“…Extensively tested models provide effective tools that can be used in identifying sustainable land management practices across different agroecological conditions. Compared to field experiments, which are time and resource consuming, models are more effective for making predictions and understanding crop and SOC dynamics on large scales and different time scales. …”
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Mechanisms for iron toxicity tolerance in lowland rice por Audebert, A., Sahrawat, K.L.

“…It causes poor growth and tillering and severe yield reductions, associated with leaf discoloration. Field experiments were conducted during 1994–1996 at an iron‐toxic lowland site at Korhogo (Ivory Coast) to study the interactions between iron toxicity and the addition of various plant nutrients. …”
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Improving and diversifying planted forages through selection, breeding and inclusion in local production systems - Examples of South-South learning por Peters, Michael, Mwendia, Solomon W., Castiblanco, Valheria, Hoek, Rein van der, Burkart, Stefan, Douxchamps, Sabine, Ohmstedt, Uwe, Notenbaert, An Maria Omer

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Caracterización fenotípica y molecular de especies silvestres de solanum con resistencia cuantitativa al tizón tardio por Gonzales, E.

“…In order to identify sources of quantitative resistance among wild Solanum species, 9 species (S. bukasovii, S. bulbocastanum, S. chomatophilum, S. capsicibaccatum, S. megistacrolobum, S. microdontum, S. raphanifolium, S. tarijense and S. verrucosum) were characterized for resistance to late blight in detached leaf assays, greenhouse and field experiments. Six of the selected species showed most of the genotypes free of R-genes, suggesting quantitative resistance to late blight. …”
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[Commentary on] Haas, Jere D. and Thomas Browlie IV. 2001. Evidence that iron deficiency anemia causes reduced work capacity por Horton, Susan, Levin, Carol E.

“…From both the laboratory and field experiments, the evidence is strong and suggests that the potential magnitude of the effect of iron-deficiency anemia on work productivity is substantial. …”
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Weather extremes shock maize production: Current approaches and future research directions in Africa por Shaolong Du, Wei Xiong

“…While studies have employed various methods, including field experiments, statistical models, and process-based modeling, African research is often limited by data gaps and technological constraints. …”
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Integrated management of weeds in direct-seeded rice in Cambodia por Martin, Robert, Som, Bunna, Janiya, Joel, Rien, Ratha, Yous, Sophea, Chhun, Sokunroth, Korn, Chariya

“…The objective of this work was to determine the value of improved establishment methods and herbicide applications as alternatives to high seeding rates to improve weed suppression in rice. Field experiments were carried out in 2010 and 2011 to determine optimal seeding rates and seeding methods with and without weed competition in wet-seeded rice. …”
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Dry matter yield and nodulation of common bean as influenced by phosphorus, lime and compost application at Southern Ethiopia por Shanka, Dereje, Dechassa, Nigussie, Gebeyehu, Setegn, Elias, Eyasu

“…Soil acidity is among the major limiting factors for common bean nodulation and productivity. Therefore, field experiments were conducted to investigate the effects of the application of phosphorus (P), lime, and compost on nodulation and dry-matter accumulation of common bean under field conditions at Areka during the long rainy season (belg) and short rainy season (meher). …”
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Rice yields decline with higher night temperature from global warming por Peng, Shaobing, Huang, Jianliang, Sheehy, John E., Laza, Rebecca C., Visperas, Romeo M., Zhong, Xuhua, Centeno, Grace S., Khush, Gurdev S., Cassman, Kenneth G.

“…We analyzed weather data at the International Rice Research Institute Farm from 1979 to 2003 to examine temperature trends and the relationship between rice yield and temperature by using data from irrigated field experiments conducted at the International Rice Research Institute Farm from 1992 to 2003. …”
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Relationship Between Leaf Photosynthesis and Nitrogen Content of Field-Grown Rice in Tropics por Peng, Shaobing, Cassman, Kenneth G., Kropff, Martin J.

“…Dry matter production data at physiological maturity from four other field experiments were used for model evaluation. There was a close correlation between Amax and Na under field conditions (r2 = 0.88). …”
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Genotype Specific Agronomic Solutions in Wheat production in Irrigated Drylands of Egypt: Genotype x Environment x Management Experiments por Attaher, Samar, Devkota Wasti, Mina Kumari, Devkota, Krishna, Omar, Mohie, Nangia, Vinay

“…These studies investigated genotype × environment × management (G × E × M) interactions to optimize wheat production. Field experiments were conducted over the 2022/23 and 2023/24 winter seasons to evaluate the effects of wheat varieties, seeding methods, and irrigation systems on crop yield, water productivity (WP), and energy efficiency in the old lands of Egypt’s Nile Valley. …”
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Effects of tillage methods and mulching on erosion and physical properties of a sandy clay loam in an equatorial warm humid region por Khatibu, A.I., Lal, R., Jana, R.K.

“…Field experiments were conducted at Kizimbani Experiment Station in Zanzibar to study the effects of different mulch materials on soil temperature and moisture regimes, soil physical properties, and runoff and soil erosion. …”
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Greenhouse Gas Emissions in Bangladeshi Rice Cultivation: Impact of Water Management Practices por Habib, Muhammad Ashraful, Islam, S.M. Mofijul, Nayak, Swati, Chandel, Amaresh, Bhosale, Sankalp, Salvo, Stella, Singh, Vikas Kumar

“…This study conducted multi-location field experiments in Rajshahi and Rangpur during the late Boro and Aus seasons of 2023-2024. …”
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Initial establishment of a farmer-based expriment network in the Indo-Gangetic Plans (IGP) Region: Pilot project for on-farm participatory climate change adaptation and visualizati... por Mathur, P.N.

Materias: “…field experimentation…”
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Effect of season, soil type and fertilizer on the biomass production and chemical composition of five tropical shrub legumes with forage potential por Tiemann, Tassilo T., Franco, LH, Peters, Michael, Frossard, Emmanuel, Kreuzer, M., Lascano Aguilar, Carlos Eduardo, Hess, H.D.

“…The biomass production and the nutritive value of three tropical shrub legumes with condensed tannins (CT) (Calliandra calothyrsus, Flemingia macrophylla, Leucaena leucocephala) and two without CT (Cratylia argentea, Desmodium velutinum) as nitrogen‐rich feed supplements for ruminants were assessed in two field experiments in Colombia. In one experiment, conducted on two different typical tropical soils (mollisol vs. oxisol; pH, 7·8 vs. 5·0; P content, 43 vs. 2 mg kg DM−1), the effects of low and high levels of fertilizer application with P, K, Ca, Mg and S were tested in both the dry and rainy seasons. …”
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Residual effects of fertilizer application on growth and yield of two cassava varieties in Ibadan, southwestern Nigeria por Edet, M., Tijani-Eniola, H., Okechukwu, R.U.

“…Field experiments were conducted to investigate the effects of application and residues of organomineral and NPK fertilizers on two cassava varieties in a tropical alfisol in Ibadan, southwestern Nigeria in 2007, 2008 and 2009. …”
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Plant guttation provides nutrient-rich food for insects por Urbaneja-Bernat, Pablo, Tena, Alejandro, González-Cabrera, Joel, Rodríguez-Saona, César

“…Our results also show that guttation droplets, unlike nectar, are present on leaves during the entire growing season and are visited by numerous insects of different orders. In exclusion-field experiments, the presence of guttation modified the insect community by increasing the number of predators and parasitic wasps that visited the plants. …”
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Grazing increases albedo of savanna grasslands por Vedin, Linda

“…A characteristic of savanna ecosystems is the tree-grass coexistence. Field experiments have indicated that in the absence of herbivory and fire, woody plant encroachment in savannas can be high, but grazing lawns seem to be resistant to shrub invasion. …”
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