Resultados de búsqueda - "pressure"

Genetic analysis of resistance to nematodes in inbred maize (Zea mays L.) and maize hybrids por Kagoda, F., Derera, J., Tongoona, P.B., Coyne, Danny L., Lorenzen, J.H.

“…The dominant genes and SCA effects would favour pedigree and various sib tests to improve grain yield under nematode pressure.…”
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The influence of the topographic position within highlands of Western Rwanda on the interactions between banana (Musa spp. AAAEA), parasitic nematodes and soil factors por Gaidashova, S.V., Asten, Piet J.A. van, Delvaux, B., Waele, D. de

“…However, in the presence of increased run-off on steeper middle slopes, root death was increased even under moderate pressure from P. goodeyi.…”
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Efficacy of indigenous arbuscular mycorrhizal fungi for promoting white yam (Dioscorea rotundata) growth in West Africa por Tchabi, A., Coyne, Danny L., Hountondji, F.C.C., Lawouin, L., Wiemken, A., Oehl, F.

“…Tuber yields of yam (Dioscorea spp.), a main staple food in West Africa, are steadily declining per unit area, an incidence for which decreasing soil fertility due to increasing land pressure is largely blamed. Recent studies demonstrated the association of a plethora of arbuscular mycorrhizal fungi (AMF) with yam, soil microorganisms crucial for natural soil fertility. …”
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Nitrogen export from a boreal stream network following forest harvesting: seasonal nitrate removal and conservative export of organic forms por Schelker, Jakob, Sponseller, Ryan, Ring, Eva, Högbom, Lars, Löfgren, Stefan, Laudon, Hjalmar

“…Further, these findings shed light on the potential impact of anticipated measures to increase forest yields of boreal forests, such as increased fertilization and shorter forest rotations, which may increase the pressure on boreal surface waters in the future.…”
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Competitiveness of cassava-based ethanol production in Southern Africa: a case of Angola, Malawi, Mozambique, South Africa and Zambia por Kambewa, E., Mudimu, G.D., Jumbo, S., Mahungu, N.M., Tafadzwa, E., Nyanzunda, T.E., Whingwiri, E.

“…Whereas the global economy has from time immemorial depended on fossil fuels, technological innovations are steadily paving ways to relieve pressure from the dwindling resources and combat the environmental consequences that come along with oil extraction and use. …”
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Storage of nutriments in black anthropogenic soils from the East-African Great Lakes Region por Delstanche, S., Asten, Piet J.A. van, Gaidashova, S.V., Delvaux, B.

“…In the East-African Great Lakes Region, low crop yields due to widespread soil infertility involve difficulties to cope with demographic pressure. Banana cropping systems are widespread and crucial for people livelihood. …”
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Diversity of plants in cocoa agroforests in the humid forest zone of Southern Cameroon por Sonwa, D.J., Nkongmeneck, B.A., Weise, Stephan F., Tchatat, M., Adesina, A.A., Janssens, M.J.J.

“…We conclude that unless there are specific efforts to promote local forest tree species in cocoa agroforests, these will progressively lose importance with increasing market access, population pressure and land use intensity.…”
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Relationships between soil fertility, banana weevil and nematodes in the East African highland cooking banana in Ntungamo, southwestern Uganda por Gold, C., Speijer, P., Ssali, H., Karamura, E.B., Okech, S.

“…It has been hypothesized that land use intensification within the region has led to decline in soil fertility, increased pest pressure, and decline in production. To document these relationships, a diagnostic survey was undertaken in Kikoni Parish, Ntungamo, southwestern Uganda, at a site where banana productivity is low (mean bunch weights of 14-23 kg per farm). …”
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QTL Analysis of Fusarium Root Rot Resistance in an Andean X Middle American Common Bean RIL Population por Wang, Weijia, Jacobs, Janette L., Chilvers, Martin I., Mukankusi, Clare Mugisha, Kelly, James D., Cichy, Karen Ann

“…The recombinant inbred line population of CAL96 × MLB‐49‐89A was phenotyped in a greenhouse for FRR resistance with the F. brasiliense isolate and screened in the field under natural FRR disease pressure. Quantitative trait locus (QTL) mapping was conducted on a map developed with 822 polymorphic single nucleotide polymorphism markers. …”
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Solutions for Thriving Ecosystems: 2017-2018 Research Highlights. por CGIAR Research Program on Water, Land and Ecosystems

“…Sadly, the degradation of ecosystems and natural resources is proceeding like never before. Pressure on land and water, pollution from pesticide overuse, and changing weather patterns are among the many factors that impact the livelihoods and food security of millions. …”
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How does conversion of natural tropical rainforest ecosystems affect soil bacterial and fungal communities in the Nile river watershed of Uganda? por Alele, P.O, Sheil, D., Surget-Groba, Y, Lingling, S, Cannon, Charles H.

“…Uganda's forests are globally important for their conservation values but are under pressure from increasing human population and consumption. …”
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Productivity and residual effects of legumes in rice-based cropping systems in a warm-temperate environment I. Legume biomass production and N fixation por Schulz, S., Keatinge, J.D.H., Wells, G.J.

“…The temperate species appeared to capitalise on generally favourable growing conditions such as long growing season, low pest and disease pressure, high radiant energy receipt and cool night temperatures. …”
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Economic losses experienced by smallscale farmers in Malawi due to cassava brown streak virus disease por Gondwe, F.M.T., Mahungu, N.M., Hillocks, R.J., Raya, M.D., Moyo, C.C., Soko, M.M., Chipungu, Felistus P., Benesi, I.R.M.

“…The paper makes the following recommendations: - the cassava research organisations should mount urgent awareness campaigns of the disease and its management for both extension agents and farmers - the cassava research organisations should establish effective collaboration with the extension system on matters of proper cassava husbandry to effectively and efficiently control the disease - they should additionally carry out local collection exercises for cultivars that show CBSD disease resistance in the high disease pressure areas - there is an urgent need for cassava research and extension organisations to multiply cultivars and promising clones that have shown multiple disease resistance and that are widely accepted by farmers for distribution in the heavily affected areas - in collaboration with entrepreneurs, these organisations need to develop and strengthen sustainable seed multiplication and distribution systems as a way of assuring the provision of clean planting material.…”
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Is partial root-zone drying more appropriate than drip irrigation to save water in China? A preliminary comparative analysis for potato cultivation por Qin, J., Ramírez, D., Xie, K., Li, W., Yactayo, W., Jin, L., Quiróz, R.

“…Such results might help reduce the pressure on the water reserves in semi-arid potato-producing areas in China. …”
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Rapid screening method of cassava cultivars for resistance to Collectotrichum gloeosporioides f.sp. manihotis por Fokunang, C.N., Dixon, Alfred G.O., Ikotun, T., Akem, C.N., Tembe-Fokunang, E.A.

“…The 10 cultivars were further tested in both greenhouse and field conditions, under disease pressure for two planting seasons, to corroborate resistance to the fungus as observed in vitro. …”
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Precipitation is the key determinant of topsoil δ15N values in southern Patagonia's semiarid rangelands por Peri, Pablo L., Duarte Guardia, Sandra, Amelung, Wulf, Ladd, Brenton

“…The effects of precipitation and stocking rate on soil δ15N values were additive, and the effect of precipitation far outweighed the effects of grazing pressure. The soil N stock was a weak predictive variable for modeling variation in δ15N of the soil. …”
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Emergence, growth, and quality of Calycophyllum spruceanum plants produced in different containers and substrates por Guerra Arévalo, Wilson Francisco, Cercado Delgado, José Roy, Espinoza García, Héctor Francisco, Ucañay Ayllon, Tatiana Mildred, García Soria, Diego Gonzalo, Abanto Rodríguez, Carlos, del Castillo Torres, Dennis, Freitas Alvarado, Luis Ernesto, Díaz Soria, Rossana, Guerra Arévalo, Héctor

“…The growing demand for Calycophyllum spruceanum is causing strong pressure on natural populations due to anthropogenic activities. …”
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Maize leaf rolling and its response to drying soil and evaporative demand por Echarte, Laura, Sinclair, Thomas, Jafarikouhini, Nahid

“…The objective of this study was to examine (i) a possible relationship between the degree of leaf rolling and soil water content and (ii) the possible influence of vapor pressure deficit (VPD) on the degree of leaf rolling. …”
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Night-time sap flow is parabolically linked to midday water potential for field-grown almond trees por Fuentes, Sigfredo, Mahadevan, M., Bonada, Marcos, Skewes, Mark A., Cox, J.W.

“…We also found strong correlations between S n and nocturnal vapour pressure deficit for T100 and T60, indicating that nocturnal transpiration was significant for both treatments. …”
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A systemic study of biofuels in complex agriculture markets por Hilbert, Jorge Antonio

“…The last few years this tendency has severely changed due to new rules and pressure over the public questioning the sustainability of biofuels and their capability to achieve environmental and social solutions. …”
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