Resultados de búsqueda - "field experiment"

Mapping the benefit-cost ratios of interventions against bovine trypanosomosis in Eastern Africa por Shaw, A.P.M., Wint, G.R.W., Cecchi, G., Torr, S.J., Mattioli, R.C., Robinson, Timothy P.

“…However, the costs calculated for elimination assume problem-free, large scale operations, and they rest on the outputs of entomological models that are difficult to validate in the field. Experience indicates that the conditions underlying successful and sustained elimination campaigns are seldom met. …”
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Effects of NPK single fertilizers on relative growth performances of two cycles of maize (Zea mays L.) grown in a degraded soil of Southwest Nigeria por Chukwuka, K., Ajala, S., Nwosu, P.C., Omotayo, O.E.

“…The design was adopted for both Green House and Field experiments. The results from the study showed that C3 performed better than C0 in Field and Green House experiments with respect to their relative performances of the growth parameters; plant height (cm), stem diameter (mm), number of leaves, leaf length (cm) and leaf width (cm) measured within the Pre-flowering period of 8 weeks. …”
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Lasting influence of biochemically contrasting organic inputs on abundance and community structure of total and proteolytic bacteria in tropical soils por Rasche, F., Musyoki, M.K., Röhl, C., Muema, E.K., Vanlauwe, Bernard, Cadisch, Georg

“…The SOM field experiments in Kenya, which have been initiated in 2002 on two contrasting soils (clayey Humic Nitisol (sand: 17%; silt: 18%; clay: 65%) at Embu, sandy Ferric Alisol (sand: 66%; silt: 11%; clay: 22%) at Machanga), were used for exploring the effect of nine year annual application of biochemically contrasting organic inputs (i.e., Zea mays (ZM; C/N ratio: 59; (lignin + polyphenols)-to-N ratio: 9.8); Tithonia diversifolia (TD; 13; 3.5); Calliandra calothyrsus (CC; 13; 6.7)) on the soil bacterial decomposer community. …”
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Participatory Evaluation of Resilient Potato Varieties in Climate-Smart Villages of Lushoto in Tanzania por Harahagazwe, D., Quiróz, R., Kuoko, Stephen, Recha, John W.M., Radeny, Maren A.O., Sayula, George, Schulte-Geldermann, Elmar, Brush, Gladness, Msoka, Elizabeth, Rimoy, Mary, Bonierbale, Merideth W., Atakos, Vivian, Kinyangi, James

“…The training was supported by field experiments using the CIP Mother and Baby Trials model. …”
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Impact of fecal sludge and municipal solid waste co-compost on crop growth of Raphanus Sativus L. and Capsicum Anuum L. under stress conditions por Grau, Felix, Drechsel, Nikita, Haering, V., Trautz, D., Weerakkody, W.J.S.K., Drechsel, Pay, Marschner, B., Dissanayake, D.M.P.S., Sinnathamby, V.

“…The aim of these experiments has been to evaluate the possibility of substituting mineral fertilization. Two field experiments were conducted on sandy loam to assess the effects of MSW compost and FS-MSW co-compost, its pelletized forms, and mineral-enriched FS-MSW on crop growth. …”
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Linking crop structure, throughfall, soil surface conditions, runoff and soil detachment: 10 land uses analyzed in northern Laos por Lacombe, Guillaume, Valentin, Christian, Sounyafong, P., Rouw, Anneke de, Soulileuth, B., Silvera, N., Pierret, A., Sengtaheuanghoung, Oloth, Ribolzi, Olivier

“…Ten land uses were monitored in Northern Laos during the 2015 monsoon, using local farmers' fields. Experiments included plots of the conventional system (food crops and fallow), and land uses corresponding to new market opportunities (e.g. commercial tree plantations). …”
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Increasing sensitivity of methane emission measurements in rice through deployment of ‘closed chambers’ at nighttime por Wassmann, Reiner, Alberto, Ma.Carmelita, Tirol-Padre, Agnes, Hoang, Nghia Trong, Romasanta, Ryan, Centeno, Caesar Arloo, Sander, Bjoern Ole

“…This study comprises field experiments on methane emissions from rice fields conducted with an Eddy-Covariance (EC) system as well as test runs for a modified closed chamber approach based on measurements at nighttime. …”
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Nitrogen contributions from decomposing cover crop residues to maize in a tropical derived savanna por Sanginga, P., Vanlauwe, Bernard, Merckx, Roel, Ibewiro, B.

“…In cover cropping systems in the tropics with herbaceous legumes, plant residues are expected to supply nitrogen (N) to non-legume crops during decomposition. Field experiments were carried out to (i) determine the effects of residue quality on decomposition and N release patterns of selected plants in cover cropping systems, (ii) relate the pattern of residue N release to N uptake by maize in cover cropping systems. …”
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Nutritional and environmental effects on biological nitrogen fixation in soybean: a meta-analysis por Santachiara, Gabriel, Salvagiotti, Fernando, Rotundo, José Luis

“…N fertilization reduced BNF ∼70% relative to the unfertilized control in greenhouse experiments and ∼44% in field experiments. This effect was higher for vegetative than for reproductive stage applications. …”
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Early water stress on growth, development and yield of high retention cotton por Paytas, Marcelo Javier

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Incomplete infection of secondarily infected potato plants – an environment dependent underestimated mechanism in plant virology por Bertschinger, Lukas, Bühler, Lukas, Dupuis, Brice, Duffy, Brion, Gessier, Cesare, Forbes, Gregory A., Keller, Ernst R., Scheldegger, Urs C., Struik, Paul C.

“…To test this hypothesis experimental data from standardized field experiments were produced in three contrasting environments at 112, 3280, and 4000 m a.s.l. in Peru during two growing seasons. …”
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Spike architecture traits associated with type II resistance to fusarium head blight in bread wheat por Franco, Maria Fiorella, Lori, G., Cendoya, Maria Gabriela, Alonso, Maria Pía, Panelo, Juan Sebastián, Malbrán, I., Mirabella, Nadia Estefania, Pontaroli, Ana Clara

“…Here, the relationship between FHB Type II resistance and spike architecture traits was evaluated in a recombinant inbred line (RIL) population of bread wheat in field experiments during two crop seasons under a completely randomized block design with two replications. …”
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Balancing yield and environmental impact: The role of split nitrogen application and fertilizer type in corn production por Iglesias, M. Paula, Wyngaard, Nicolás, Lewczuk, Nuria, Sainz Rozas, Hernan Rene, Toribio, M., García, Fernando O., Reussi Calvo, Nahuel Ignacio

“…The objective of our study was to evaluate the effect of N sources and split N applications on gaseous emissions, environmental costs, and maize productivity under different water regimes. Field experiments were conducted in two growing seasons. …”
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Reproductive development of Lotus tenuis (fabaceae) crop defoliated at different times and intensities por Vignolio, Osvaldo, Cambareri, Gustavo Sebastián, Petigrosso, Lucas R, Murillo, Natalia Lorena, Maceira, Nestor Oscar

“…However, little is known about the effects of defoliation management on L. tenuis flower and pod production and subsequent seed yield. Two field experiments were conducted to study the response of L. tenuis to defoliation at different flowering stages and intensities. …”
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Potato early blight epidemics and comparison of methods to determine its initial symptoms in a potato field por Campo Arana, Rodrigo OrlandoZambolim, Laércio, Costa, Luiz Claudio

“…The influence of an early blight epidemic on potato tuber yield was evaluated in three field experiments during 2000 to 2002 crop seasons under Viçosa, Minas Gerais state growing conditions. …”
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Liming agricultural soils in Western Kenya: Can long-term economic and environmental benefits pay off short term investments? por Hijbeek, Renske, Loon, Marloes P. van, Ouaret, Walid, Boekelo, Batiaen, Ittersum, Martin van

“…Methods First, a meta-analysis using a regression analysis was conducted to quantify effects of lime application on soil pH and maize yields based on 26 field experiments. Related effects on farm profit and and returns on investment were estimated for a period of five years for soils with varying levels of initial soil pH and fertiliser application. …”
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Simulating the response of drought-tolerant maize varieties to nitrogen application in contrasting environments in the Nigeria Savannas using the APSIM Model por Beah, A., Kamara, A., Jibrin, J.M., Akinseye, Folorunso M., Tofa, A., Adam, A.M.

“…The model was calibrated for two maize varieties using data from field experiments conducted under optimum conditions in three locations during the 2017 and 2018 cropping seasons. …”
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What evidence exists relating the impact of different grassland management practices to soil carbon in livestock systems? A systematic map protocol por Rousset, Camille, Segura, Carmen, Gilgen, Anina, Alfaro, Marta, Mendes, Luís André, Dodd, Mike, Dashpurev, Batnyambuu, Bastidas, Mike, Rivera, Julian, Merbold, Lutz, Vázquez, Eduardo

“…We established a preliminary search string by combining search terms for the Population (Grasslands), Intervention (management) and Outcome (soil carbon) categories, as well as with one additional group (Study types—to focus on farm and field experiments). We will conduct a comprehensive literature search of relevant peer-reviewed and grey literature using Web of Science, Scopus, CABI platforms, Google Scholar, and specialised websites (e.g., Agrotrop). …”
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Modification of nutrient requirements for a four crop-based cropping system to increase system productivity, maintain soil fertility, and achieve sustainable intensification por Quddus, Md. Abdul, Anwar, Md. Babul, Alam, Md. Khairul, Ahmed, Razu, Sarker, Khokan Kumer, Islam, Md. Anarul, Islam, Md. Torikul, Kobeasy, Mohamed I., Gaber, Ahmed, Ahmed, Sharif

“…The nutrient management for the recently developed four crop-based cropping system in Bangladesh has not yet been studied. Hence, field experiments were conducted on the nutrient management of the four crop-based cropping system [Aus (pre-monsoon rice), Aman (monsoon rice), lentil, and mungbean] in calcareous soil in Bangladesh during the years of 2016/17 and 2017/18 to determine the appropriate fertilizer management package to improve crop productivity and sustain soil fertility. …”
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Effect of herbicides and Sesbaniaco-culture on weed management and grain yield of direct seeded rice variety Khumal-4 at Khumaltar condition, Nepal por Bhattarai, R.K., Gautam, D.D., Ranjit, J.D., Chauhan, B.S.

“…Field experiments were conducted at the experimental field of Agronomy Division, Khumaltar, Nepal during 2012 and 2013 to find the effect of different herbicides on weed management and grain yield of direct seeded rice. …”
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