Resultados de búsqueda - "A"

Signatures of positive selection in African Butana and Kenana dairy zebu cattle por Bahbahani, Hussain, Salim, B., Almathen, F., Al Enezi, F., Mwacharo, Joram M., Hanotte, Olivier H.

“…Genetic structure analysis shows that both breeds have an admixed genome composed of an even proportion of indicine (0.75 ± 0.03 in Butana, 0.76 ± 0.006 in Kenana) and taurine (0.23 ± 0.009 in Butana, 0.24 ± 0.006 in Kenana) ancestries. We also observe a proportion of 0.02 to 0.12 of European taurine ancestry in ten individuals of Butana that were sampled from cattle herds in Tamboul area suggesting local crossbreeding with exotic breeds. …”
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Plant genetic resources for food and agriculture: opportunities and challenges emerging from the science and information technology revolution por Halewood, Michael, Chiurugwi, T., Sackville-Hamilton, N. Ruaraidh, Kurtz, B., Marden, E., Welch, Eric W., Michiels, F., Mozafari, J., Sabran, M., Patron, N., Kersey, Paul J., Bastow, R., Dorius, S., Dias, S., McCouch, S., Powell, W.

“…We discuss potential responses to political and institutional challenges, ranging from options for enhanced structure and governance of research discovery platforms to internationally brokered benefit-sharing agreements, and identify a set of broad principles that could guide the global community as it seeks or considers solutions.…”
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Definition of smallholder Sheko cattle keepers’ breeding objectives through phenotypic ranking and choice experiments in Ethiopia por Bayou, E., Haile, Aynalem, Gizaw, Solomon, Mekasha, Yoseph

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Cogongrass suppression by intercropping cover crops in corn/cassava systems por Chikoye, David, Ekeleme, F., Udensi, U.E.

“…Cogongrass is a difficult weed to control in small-scale farming systems and often causes significant crop yield reduction. …”
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The influence of crop management on banana weevil, Cosmopolites sordidus (Coleoptera: Curculionidae) populations and damage to highland cooking banana (cv. Atwalira) in Uganda por Rukazambuga, N., Gold, C., Gowen, S., Ragama, P.E.

“…A field study was undertaken in Uganda using highland cooking banana (cv. …”
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Evaluation of MALDI-TOF mass spectrometry for the competitiveness analysis of selected indigenous cowpea (Vigna unguiculata L. Walp.) Bradyrhizobium strains from Kenya por Ndungu, S.M., Messmer, M.M., Ziegle, D., Thuita, Moses N., Vanlauwe, Bernard, Frossard, Emmanuel, Thonar, C.

“…The four most efficient strains were further evaluated in a field trial in Mbeere during the 2014 short rains. …”
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C and N stocks are not impacted by land use change from Brazilian Savanna (Cerrado) to agriculture despite changes in soil fertility and microbial abundances por Lammel, D.R., Butterbach-Bahl, Klaus, Cerri, C.E.P., Louis, S., Schnitzler, J.P., Feigl, B.J., Cerri, C.C.

“…The objective of this study was to compare changes in soil fertility, stocks of soil C and N, microbial biomass, and abundance of bacteria, fungi and archaea in Cerrado soils following land use change to crops (soybean/corn/cotton) and pasture (the perennial forage grass Brachiaria brizantha A. Rich.). Agriculture increased soil fertility and conserved soil C and N since their absolute concentration values were highest in agriculture soils and the C and N stocks adjusted by soil density were similar to the native vegetation soils. …”
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Yield evaluation of nutrient-rich potato clones in high hill of Nepal por Luitel, B.P., Khatri, B.B., Lama, L., Dhakal, R., Khadka, K., Choudhary, D., Arya, S., Kadian, M.S., Bonierbale, Merideth W.

“…A study was conducted to evaluate the yield of nutrient-rich potato clones in high-hill districts: Dolakha and Jumla of Nepal during the years 2013 and 2014, respectively. …”
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Integrating local knowledge with tree diversity analyses to optimize on-farm tree species composition for ecosystem service delivery in coffee agroforestry systems of Uganda por Bukomeko, Hannington, Jassogne, Laurence T.P., Tumwebaze, Susan Balaba, Eilu, Gerald, Vaast, Philippe

“…The study was in three sites along a rainfall gradient in Central Uganda where we: assessed tree diversity in coffee agroforestry; ranked tree suitability for providing ES according to farmers’ knowledge; and then proposed an approach for optimizing on-farm tree composition for delivery of ES. …”
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Controlling groundwater through smart card machines: the case of water quotas and pricing mechanisms in Gansu Province, China por Aarnoudse, E., Bluemling, B.

“…The study compares the situation in two counties where local authorities opted for two different types of regulatory mechanisms enabled by the smart cards: Minqin County - where they chose quotas, and Guazhou County - where they opted for a tiered water pricing system.…”
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How countries link REDD+ interventions to drivers in their readiness plans: implications for monitoring systems por Salvini, Giulia, Herold, Martin, Sy, Veronique de, Kissinger, G., Brockhaus, Maria, Skutsch, M.

“…In this article we provide a comprehensive and comparative assessment of interventions proposed by 43 REDD+ countries in 98 readiness documents. …”
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Origin and Alteration of Organic Matter in Termite Mounds from Different Feeding Guilds of the Amazon Rainforests por Siebers, N., Martius, C., Eckhardt, K-U., García, M.V.B., Leinweber, P., Amelung, Wulf

“…This result was confirmed by elevated NCPS:CPS ratios, indicating a preferential cellulose decomposition in the nests. …”
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Growing City and Rapid Land Use Transition: Assessing Multiple Hazards and Risks in the Pokhara Valley, Nepal por Rimal, B., Baral, H., Stork, N.E., Paudyal, K., Rijal, S.

“…Pokhara is one of the most naturally beautiful cities in the world with a unique geological setting. This important tourist city is under intense pressure from rapid urbanization and population growth. …”
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Bushmeat consumption among rural and urban children from Province Orientale, Democratic Republic of Congo por Vliet, N. van, Nebesse, C., Nasi, Robert

“…We show that despite the tendency towards more urbanized population profiles and increased livelihood opportunities away from forest and farms, wildlife harvest remains a critical component of nutritional security and diversity in both rural and urban areas of the Democratic Republic of Congo.…”
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Integrated soil management for the dry savanna zone of West Africa: legume rotation and fertilizer N por Carsky, R.J., Oyewole, B., Tian, G.

“…All treatments were followed by a maize test crop in the second year with 0, 30, or 60 kg N ha−1 as urea. …”
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Soil organic matter dynamics after addition of nitrogen15 labeled leucaena and dactyladenia residues por Vanlauwe, Bernard, Sanginga, N., Merckx, Roel

“…Engl.] leaf residues was followed through the SOM of different particle-size fractions during 858 d. A bioassay study with maize (Zea mays L.) was carried out to assess the availability of residue-derived N (RDN) incorporated in the particle-size fractions. …”
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Effect of planting season on cassava anthracnose disease development por Fokunang, C.N., Akem, C.N., Ikotun, T., Dixon, Alfred G.O.

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Soil water regime under rotational fallow and alternating hedgerows on an Ultisol in southern Cameroon por Hauser, S., Norgrove, L., Duguma, B., Asaah, E.

“…The volumetric water content of the 0–150 cm soil profile was measured under planted hedgerows (alternating Leucaena leucocephala and Gliricidia sepium) and natural fallow, both either annually cropped to sole maize or in a two-year crop/two-year fallow rotation, in the humid forest zone (annual rainfall 1700 mm) of southern Cameroon during the 1995–1996 and 1996–1997 dry seasons. …”
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Gene diversity among botanical varieties in peanut (Arachis hypogaea L.) por Ferguson, Morag E., Bramel-Cox, P.J., Chandra, S.

“…Discriminant function analysis reveals a high degree of accordance between variety delimitation on the basis of morphological and molecular characters. …”
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Transboundary aquifers of Africa: Review of the current state of knowledge and progress towards sustainable development and management por Nijstena, G-J., Christelis, G., Villholth, Karen G., Braune, E., Gaye, B.C.

“…Comparing indicators, from questionnaire surveys, with those from a global water-use model showed variable levels of agreement, calling for further research. …”
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