Resultados de búsqueda - "field experiment"

Puddling Influence on Soil, Rice Development, and Yield por Sharma, P.K., De Datta, S.K.

“…The effects of puddling on soil physical properties, percolation losses of water and nutrients, and nutrient uptake and grain yield of IR36 rice (Oryza sativa L.) in an Andaqueptic Haplaquoll and a Lithic Hapludoll were evaluated in a field experiment. Puddling decreased the bulk densities of both soils in the top 0.1‐m layer by about 30%, but the differences in bulk density between puddled and nonpuddled soil narrowed with time. …”
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Fungicide evaluation against head smudge (Curvularia spp.) and its impact on yield and germination of tef (Eragrostis tef Zucc.) por Mekonnen, Mequanint Andualem, Nigusie, Walellign Zegeye, Emirie, Gebremariem Asaye, Hailemariam, Bogale Nigir, Abeje, Girmay Dires, Mekonnen, Melkamu Birhanie, Mihiretie, Aderajew

“…Tef seeds harvested from field experiments were subsequently used for laboratory studies using the blotter method and arranged in a completely randomized design. …”
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Core bacteria and fungi in response to residue retention and their contribution to soil multifunctionality in maize agroecosystem por Guo, Quankuan, Yu, Yang, Zhang, Shuhan, Guan, Yupeng, Jiang, Nana, Pang, Shuang, Fadda, Carlo, De-Santis, Paola, Bergamini, Nadia, Liu, Xuesheng, Zhang, Ximei, Yang, Wei

“…Consequently, we examined the effect of residue retention on soil core and non-core microbial communities in maize seedling, mature stage and freezing period based on a multi-site field experiment in Sanjiang Plain, Northeast China. Totally, 247 bacterial amplicon sequence variants (ASVs) and 109 fungal ASVs were identified as core microbiota. …”
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Spraying high concentrations of chelated zinc enhances zinc biofortification in wheat grain por Xu, Meng, Liu, Mengjiao, Si, Linlin, Ma, Qingxu, Sun, Tao, Wang, Jun, Chen, Kaijun, Wang, Xiangjie, Wu, Lianghuan

“…The aim of this study, based on a 2 year field experiment conducted on wheat cultivated in acidic and alkaline soil, was to identify a suitable Zn formulation with a high Zn concentration or efficient adjuvant to achieve optimal Zn biofortification levels without compromising agronomic performance. …”
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Fertilizer subsidies versus soil health payments: does policy incentives framing matter por Oyinbo, Oyakhilomen, Chamberlin, Jordan

“…We use datasets from a framed field experiment, enabling us to quantify and compare farmer valuations of soil health and other production attributes under two framings of policy incentives of equivalent monetary costs: 1) fertilizer subsidies, and 2) soil health payments. …”
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Greenhouse gas emissions under conservation agriculture compared to traditional cultivation of maize in the central highlands of Mexico por Dendooven, Luc, Gutiérrez Oliva V.F., Patiño-Zúñiga L, Ramírez Villanueva D.A., Verhulst, Nele, Luna Guido M, Marsch R, Montes Molina, J., Gutiérrez Miceli, F.A., Vázquez Murrieta, S., Govaerts, Bram

“…In 1991, the ‘International Maize and Wheat Improvement Center’ (CIMMYT) started a field experiment in the rain fed Mexican highlands to investigate conservation agriculture (CA) as a sustainable alternative for conventional maize production practices (CT). …”
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Evaluation of application timing in fertilizer micro-dosing technology on millet production in Niger, West Africa por Hayashi, K, Abdoulaye, Tahirou, Gerard, Bruno G., Bationo, B. André

“…A 2-year on-station experiment and a 1-year on-farm field experiment were conducted in the western region of Niger, West Africa. …”
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Nitrogen recoveries from organic amendments in crop and soil assessed by isotope techniques under tropical field conditions por Douxchamps, Sabine, Frossard, Emmanuel, Bernasconi, S, Hoek, Rein van der, Schmidt, A., Rao, Idupulapati M., Oberson, Astrid

“…Microplots were installed in a 6-year old field experiment with maize-canavalia rotation. Direct and indirect 15N-labelling techniques were used to determine N uptake by maize from canavalia residues and canavalia-fed cows manure compared to mineral fertilizer. …”
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Long-term effects of TSP and Minjingu phosphate rock applications on yield response of maize and soybean in a humid tropical maize–legume cropping system por Savini, Isaac, Kihara, Job Maguta, Koala, Saidou, Mukalama, John, Waswa, Boaz Shaban, Bationo, B. André

“…A study was conducted in western Kenya to explore alternative P inputs and ways of optimizing their effectiveness and profitability. A field experiment established in 2007 studied the effects of Minjingu phosphate rock (MPR) and triple superphosphate (TSP) on maize, common beans and soybean yield. …”
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Response of ammonia-oxidizing bacteria and archaea to biochemical quality of organic inputs combined with mineral nitrogen fertilizer in an arable soil por Muema, E.K., Cadisch, Georg, Rohl, C., Vanlauwe, Bernard, Rasche, F.

“…Here, we investigated in a Humic Nitisol of 10-year old field experiment in Kenya the effect of contrasting organic inputs (i.e., Tithonia diversifolia (TD; C/N ratio: 13, Lignin: 8.9%; Polyphenols: 1.7%), Calliandra calothyrsus (CC; 13; 13; 9.4) and Zea mays (ZM; 59; 5.4; 1.2); rate of 4 Mg C ha−1 year−1) combined with mineral N fertilizer (120 kg CaNH4NO3 ha−1 growing season−1) on amoA gene-based abundance (i.e., functional potential) and community composition of AOB and AOA. …”
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Infrared radiometry as a tool for early water deficit detection: insights into its use for establishing irrigation calendars for potatoes under humid conditions por Rinza, J., Ramírez, D., García, J., Mendiburu, F. de, Yactayo, W., Barreda, C., Velásquez, T., Mejia, A., Quiróz, R.

“…In an additional field experiment, CWSI was validated by testing two irrigation timing treatments with pre-established gs_max threshold (0.15 [T1] and 0.50 [T2] mol H2O m−2 s−1) against a control (frequently irrigated). …”
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Symptomatology and development of banana streak badnavirus, under natural conditions in Ibadan, Nigeria por Hughes, J., Gauhl, F., Pasberg-Gauhl, C., Dahal, G.

“…A field experiment with suckers taken from five improved plantain hybrids and one landrace with typical symptoms of banana streak badnavirus (BSV) infection was established at Ibadan (Nigeria) to investigate climatic factors affecting BSV symptom development and to identify parameters useful in genotype evaluation for BSV incidence. …”
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Effects of the Frequency of Iron Chelate Supply by Fertigation on Iron Chlorosis in Citrus por Banuls, Josefina, Quinones, Ana, Martin, Bernardo, Primo-Millo, Eduardo, Legaz, Francisco

“…A field experiment was carried out in a drip‐irrigated orchard of Clementine (Citrus clementina Ort. ex. …”
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Olfactory responses of the parasitic wasp, Trybliographa rapae (Hymenoptera: Figitidae) por Eriksson, Anna

“…Two compounds from infested plants repeatedly elicited responses from the antennae of female T. rapae in a gas chromatograph coupled with an electroantennograph (GC-EAD). In a semi-field experiment, there was a tendency that the parasitism rate increased due to nectar from buckwheat flowers. …”
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Late infection of Fusarium graminearum in winter wheat grown under different nitrogen regimes por Alkhaled, Baraa

“…To achieve this, winter wheat spikes around harvesting time were collected from a field experiment near Uppsala fertilized with different amounts of N treatments. …”

Factors affecting variation in forest community characteristics and leaf-litter decomposition in tropical montane forest of Chiapas, México A functional ecology approach por Bolom-Ton, Fausto

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Differences in arbuscular mycorrhizal colonization and P acquisition between genotypes of the tropical Brachiaria grasses: is there a relation with BNI activity? por Teutscherova, Nikola, Vázquez, Eduardo, Arévalo, Ashly, Pulleman, Mirjam Margreet, Rao, Idupulapati M., Arango, Jacobo

“…In a field experiment in Palmira, Colombia, we studied mycorrhizal root colonization, phosphomonoesterase activities and P and N foliar content before and after N fertilization among different Brachiaria genotypes with demonstrated biological nitrification inhibition (BNI) capacity. …”
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Maize-Brachiaria intercropping: A strategy to supply recycled N to maize and reduce soil N₂O emissions? por Pecci Canisares, Lucas, Momesso, Letusa, Costa Crusciol, Carlos Alexandre, Villegas, Daniel Mauricio, Arango, Jacobo, Ritz, Karl, Cantarella, Heitor, Rosolem, Ciro Antonio

“…It was hypothesized that brachiaria intercropping increases N recycling and maize grain yield and reduces nitrous oxide (N2O) emissions from soil under maize cropping. A field experiment was set up in December 2016 to test three cropping system (maize monocropped, maize intercropped with Brachiaria brizantha or with B. humidicola) and two N rates (0 or 150 kg ha-1). …”
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Multimodel evaluation of nitrous oxide emissions from anintensively managed grassland por Fuchs, K., Merbold, Lutz, Buchmann, Nina, Bretscher, D., Brilli, L., Fitton, N., Topp, C.F.E., Klumpp, K., Lieffering, M., Martin, R., Newton, P.C.D., Rees, R.M., Rolinski, S., Smith, P., Snow, V.

“…Experimental data of N2O emissions under two management practices (control with typical fertilization versus increased clover and no fertilization) were acquired in a Swiss field experiment. We conducted a multimodel evaluation with three commonly used biogeochemical models (DayCent in two variants, PaSim, APSIM in two variants) comparing four years of data. …”
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The influence of genetic architecture on responses to selection under drought in rice por Ćalić, Irina, Groen, Simon C., Choi, Jae Young, Joly-Lopez, Zoé, Hamann, Elena, Natividad, Mignon A., Dorph, Katherine, Cabral, Carlo Leo U., Torres, Rolando O., Vergara, Georgina V., Henry, Amelia, Purugganan, Michael D., Franks, Steven J.

“…Here, we conducted a field experiment to investigate potential constraints to selection for drought resistance in rice (Oryza sativa) using phenotypic selection analysis and quantitative genetics. …”
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