Resultados de búsqueda - Opeth~

Soil carbon in small-holder plantain farms, Uganda : a comparison between agroforestry and non-agroforestry por Björsell, Pia

“…At each farm, soil samplings were taken close to a tree and in the middle of the field, respectively, to the mass equivalent depths of 0-20 and 20-40 cm. In total, 40 samples were analysed at Makerere University in Kampala for SOC concentration, water holding capacity, electrical conductivity, pH and texture. …”

Optimalt skogsbruk baserat på analyser med PlanVis por Benjaminsson, Simon

“…An optimal economic forestry is something many probably striving for. It’s however difficult to achieve since the subjective judgments and emotions characterize the forestry planning. …”
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Continental-scale controls on soil organic carbon across sub-Saharan Africa por Fromm, S.F. von, Hoyt, A. M., Lange, M., Acquah, G. E., Aynekulu, E., Berhe, A. A., Haefele, S. M., McGrath, S. P., Shepherd, Keith D., Sila, A. M., Six, Johan, Towett, Erick K., Trumbore, S. E., Vågen, Tor-Gunnar, Weullow, E., Winowiecki, Leigh Ann, Doetterl, S.

“…A total of 1601 samples were analyzed, collected from two depths (0–20 and 20–50 cm) from 17 countries as part of the Africa Soil Information Service project (AfSIS). …”
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Evaluating greenhouse gas mitigation through alternate wetting and drying irrigation in Colombian rice production por Loaiza, Sandra, Verchot, Louis V., Valencia, Drochss, Guzmán, Patricia, Amézquita, Nelson, Garcés, Gabriel, Puentes, Oscar, Trujillo, Catalina, Chirinda, Ngonidzashe, Pittelkow, Cameron M.

“…Over four consecutive growing seasons, we monitored CH4 and N2O emissions, grain yield, and water consumption for two AWD treatments (AWD5 cm and AWD10 cm - where water drained to depths of 5 and 10 cm below the soil surface, respectively) and a control, in which the field was drained multiple times during fertilizer applications and then continuously flooded until harvest. …”
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Mulch application as the overarching factor explaining increase in soil organic carbon stocks under conservation agriculture in two 8-year-old experiments in Zimbabwe por Shumba, Armwell, Chikowo, Regis, Thierfelder, Christian, Corbeels, Marc, Six, Johan, Cardinael, Rémi

“…The soil organic carbon (SOC) concentration and soil bulk density were determined for samples taken from depths of 0–5, 5–10, 10–15, 15–20, 20–30, 30–40, 40–50, 50–75 and 75–100 cm. …”
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Impact of land-use changes on soil properties and carbon pools in India: A meta-analysis por Padbhushan, Rajeev, Kumar, Upendra, Sharma, Sheetal, Rana, D.S., Kumar, Rajkishore, Kohli, Anshuman, Kumari, Priyanka, Parmar, Brajendra, Kaviraj, Megha, Sinha, Abhas Kumar, Annapurna, K., Gupta, Vadakattu V. S. R.

“…In this study, over 1,786 paired datasets (for meta-analysis) on land uses (LUs) were collected from Indian literature (1990–2019) to determine the magnitude of the influence of LUC on soil carbon, microbial biomass, and other physical and chemical properties at three soil depths. Meta-analysis results showed that grasslands (36.1%) lost the most soil organic carbon (SOC) compared to native forest lands, followed by plantation lands (35.5%), cultivated lands (31.1%), barren lands (27.3%), and horticulture lands (11.5%). …”
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Soil organic carbon and nutrient content across agricultural systems in the forest-savannah transition zone of Cameroon por Mandah, V.P., Masso, C., Onana, A.A., Fiaboe, K., Arthur, E., Giweta, M., Ndango, R., Silatsa, F.B.T., Voulemo, D.D.I., Biloa, J.B., Ngeumezi, C., Tematio, P.

“…The soil was sampled at two depths, 0–10 cm (upper layer) and 10–30 cm (lower layer) in three replicates for each farming system and analyzed. …”
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Two-dimensional modeling of nitrate transport in canola field under Moistube irrigation using HYDRUS 2D/3D por Dirwai, Tinashe Lindel, Senzanje, A., Mabhaudhi, T.

“…Soil samples were collected both adjacent to and 15 cm away from MTI laterals at multiple depths before and at 2 h, 4 h, 24 h, 48 h, and 72 h post-fertigation. …”
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Drivers of soil organic carbon stocks at village scale in a sub-humid region of Zimbabwe por Nyawasha, R.W., Falconnier, G.N., Todoroff, P., Wadoux, A.M., Chikowo, R., Conquerean, A., Leroux, L., Jahel, C., Corbeels, M., Cardinael, R.

“…SOC stocks were measured across three soil types and eight land uses (croplands, gardens, fallows, grasslands, vleis, shrublands, forests and tree plantations) at soil depths of 0–20 and 20–40 cm. Estimates from AfSIS were also used for comparison. …”
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Soil organic carbon and nutrient contents are not influenced by exclosures established in communal grazing land in Nile Basin, northern Ethiopia por Mekuria, Wolde, Langan, Simon J., Noble, A.D., Johnston, Robyn M.

“…In the 0- to 20- and 20- to 50-cm depths, significant (p < 0.05) differences in soil pH, exchangeable cations, cation exchange capacity, soil moisture content, and bulk density were observed among exclosures and between exclosures and communal grazing land. …”
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Irrigation Recommendation for Water Saving and Salinity Control in Horticulture in the Semi-arid Lower Cheliff Plain (Algeria) por Abdelkrim, Noureddine, Hartani, Tarik, Visconti, Fernando, De-Paz, José M., Douaoui, Abdelkader

“…The soil properties were determined in the entire rooting depths down to 80 cm for artichoke and 60 cm for melon. …”
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Soil resistance and recovery during neotropical forest succession por van der Sander, Masha T, Powers, Jennifer S, Norden, Natalia, Salgado Negret, Beatriz, Bongers, Frans, Delgado, Diego, Dent, Daisy H, Dupuy, Juan Manuel, Finegan, Bryan, Jakovac, Catarina C, Meave, Jorge A, Muñoz, Rodrigo, Piotto, Daniel, Cáceres Siani, Yasmani, Sanchez Azofeifa, G. Arturo, Poorter, Lourens, y 15 autores más

“…For 300 plots in 21 sites across the Neotropics, we used a chronosequence approach in which we sampled soils from two depths in old-growth forests, agricultural fields (i.e. crop fields and pastures), and secondary forests that differ in age (1–95 years) since abandonment. …”
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Små skogliga vattendrag i Värmland por Bergkvist, Åsa

“…Modern forestry requires a high degree of machine traffic for clear felling and scarification operations. The machines most frequently used are big and the traffic often results in tracks on the forest ground. …”
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Om behovet av ett avrinningsområdesanpassat skogsbruk por Pettersson, Robin

“…Study if it´s any connection between the presence of dead wood, and wa-tercourse depths. In the sample locals quantified dead wood in the riparian zones, age structure and tree species composition in a 30 meters wide zone on the both sides on each water route. …”

Reseskisser por Lindqvist, Jens

“…The way we respond to a new surrounding tells us about who we are as well as it tells us something about the new surrounding. Two field trips combined with sketching were carried out during the fall 2008. …”
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Practising evolution: Theory for understanding and evaluating participatory research por Loevinsohn, Michael E.

“…Research and development that aim to stimulate farmers' experimentation demand something of a paradigm shift. Such "collegial" or "empowering" participation requires altered attitudes, new skills and changed incentive structures. …”
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Returns to public agricultural and rural investments in China por Fan, Shenggen, Cho, Emily EunYoung, Rue, Christopher

“…In addressing these emerging challenges, continued support for agricultural R&D and innovations can play a key role.The paper highlights research findings on key investment areas that will be increasingly important for China’s agri-food system, and provides guidance in the context of emerging trends impacting food security and nutrition.…”
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Morphological, pathological and phylogenetic analyses identify a diverse group of Colletotrichum spp. causing leaf, pod and flower diseases on the orphan legume African yam bean por Ogunsanya, O.M., Adebisi, M.A., Popoola, A.R., Afolabi, C.G., Oyatomi, O., Colgan, R., Armitage, A., Thompson, E., Abberton, M., Ortega-Beltran, A.

“…Availability of such strategies may stimulate greater AYB cultivation, which can contribute to diet diversification, something repeatedly advocated by a range of stakeholders to increase food security and prosperity of smallholder farmers.…”
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CIFOR - a newcomer to CGIAR por Persson, R.

“…There must also be a strong commitment to doing something to reduce poverty, as it is often difficult to improve the forests if the well being of humans who depend on them is not improved. …”
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Influence of arboreal components on the physical-chemical characteristics of the soil under four silvopastoral systems in northeastern Peru por Vásquez Pérez, Héctor Vladimir, Valqui Valqui, Leandro, Bobadilla Rivera, Leidy, Arbizu Berrocal, Carlos Irvin, Alegre Horihuela, Julio, Maicelo Quintana, Jorge Luis

“…The experimental units were sampled at two depths, 0–15 and 15–30 cm. The parameters evaluated were pH, electrical conductivity (dS/m), organic matter (%), phosphorus (ppm), potassium (ppm), cation exchange capacity (meq/100 g), porosity (%), mechanical resistance (kg/cm2), bulk density (gr/cm3), moisture (%) and total carbon (t/ha). …”
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