Resultados de búsqueda - "Decadence"

Fertilizer response functions of rice in Sri Lanka: estimation and some applications por Kikuchi, M., Aluwihare, P.B.

“…More than forty percent of the increase in rice production in the last four decades is attributable to the varietal improvements. …”
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Energy-irrigation nexus in South Asia: improving groundwater conservation and power sector viability por Shah, Tushaar, Scott, Christopher A., Kishore, Avinash, Sharma, Abhishek

“…In the highly populated South Asian region, where pump irrigation has gained predominance over gravity-flow irrigation in recent decades, the fortunes of groundwater and energy economies are closely tied. …”
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Climate variability and change: perceptions, experiences and realities por Rao, K.P.C., Oyoo A

“…The main source of this risk is the variability in rainfall that occurs at many different timescales, ranging from seasons to years to decades and beyond. Farmers operating under these conditions make decisions based on their perceptions and experiences gained from several years of keen observation and practice in the field. …”
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Fertiliser best management practices for maize systems por Jat, Mangi Lal, Satyanarayana, T., Majumdar, K., Parihar, Chiter Mal, Jat, S.L., Tetarwal, J.P., Jat, Kumar Raj, Saharawat, Yashpal S.

“…Strong market demand and resilience of maize to abiotic and biotic stresses have increased the area and production of maize in the country over the past decade. Productivity of maize, however, has not increased proportionately and significant yield gaps are evident across maize growing areas in the country. …”
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The potential of agroforestry in the provision of sustainable woodfuel in sub-Saharan Africa por Iiyama, Miyuki, Neufeldt, Henry, Dobie, P., Njenga M, Ndegwa G, Jamnadass, Ramni H.

“…Woodfuel plays a critical role in energy provision in sub-Saharan Africa (SSA), and is predicted to remain dominant within the energy portfolio of the population in the coming decades. Although current inefficient technologies of production and consumption are associated with negative socio-economic and environmental outcomes, projected charcoal intensive pathways along with urbanization may further accelerate pressures on tree covers. …”
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The challenges on out-scaling participatory methods in agricultural research por Aw-Hassan, Aden A.

“…For the last decade or so, participatory research has become an attractive mechanism for conducting adaptive agricultural research. …”
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Restoring lands and livelihoods in Burkina Faso: the business of one association por Elias, Marlène, Vinceti, B.

“…A Burkinabè association tiipaalga (meaning ‘new tree’) has worked with the country’s farmers for over a decade to help them bring their degraded lands back to life. …”
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Simulating the evolution of soil solutions in irrigated rice soils in the Sahel por Hammecker, C., Asten, Piet J.A. van, Marlet, S., Maeght, J.L., Poss, R.

“…In Sahelian countries, agriculture often relies on irrigation especially for rice cropping which has been introduced these last decades. As most of the water resources used for irrigation (mainly rivers and lakes) have an alkaline composition, rice cropping is often held as responsible for soil alkalinization. …”
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Characteristic trajectories of ecosystem services in mountains por Locatelli, Bruno, Lavorel, S., Sloan, S., Tappeiner, U., Geneletti, D.

“…Intensification of land use and management over recent decades has resulted in trade‐offs between food or timber production and other ecosystem services (ES). …”
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Recent advances in cowpea breeding por Singh, B., Chambliss, O., Sharma, B.

“…Considerable progress has been made during the past decade in cowpea breeding, and a range of varieties has been developed, combining diverse plant type and maturity with resistance to several diseases, insect pests, and parasitic weeds. …”
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Economic gains from maize research in West and Central Africa: an overview por Manyong, Victor M., Makinde, K.O., Coulibaly, O.

“…Agricultural research by national systems and international institutes has contributed to the increase in maize production and productivity in West and Central Africa (WCA) over the last three decades. This subregion accounted for about 43% of maize production in sub-Saharan Africa (SSA) from 1998-2000, compared with 17% 30 years ago (1968-1970). …”
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Current strategies of polyploid plant genome sequence assembly por Kyriakidou, M., Tai, H.H., Anglin, Noelle L., Ellis, David, Stromvik, M.V.

“…As climate change continues to pose a potential threat to agricultural production, there will increasingly be a demand for plant cultivars that can resist biotic and abiotic stresses and also provide needed and improved nutrition. In the past decade, Next Generation Sequencing (NGS) has fundamentally changed the genomics landscape by providing tools for the exploration of polyploid genomes. …”
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Decisionmaking by smallholder farmers in an oil plambased economy in southern Benin, West Africa por Meikle, W.G., Gutiérrez, A.P., Herren, H.R.

“…Since trees produce fruit for several decades, this price seems very low. A life-table analysis of the trees was conducted after converting tree height to tree age and substituting revenue for offspring. …”
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Public sector soybean (Glycine max) breeding: advances in cultivar development in the African tropics por Chigeza, G., Boahen, S., Gedil, Melaku A, Agoyi, E., Mushoriwa, H., Denwar, N., Gondwe, T., Tesfaye, A., Kamara, A., Alamu, Emmanuel Oladeji, Chikoye, David

“…Formal public sector soybean breeding in Africa spans over four decades, and it was initiated by the International Institute of Tropical Agricultural (IITA). …”
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How much does climate change add to the challenge of feeding the planet this century? por Aggarwal, Pramod K., Vyas, Shalika, Thornton, Philip K., Campbell, Bruce M.

“…A meta-analysis of ~27,000 data points from studies published over the last four decades reveals that at country level, average impacts of climate change on crop yields up to the 2050s are generally small (but negative) for rice and wheat, and modest for maize, provided farmers adopt practices and technologies such as improved varieties, planting at optimal times, and improved water and fertilizer management. …”
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The hamburger connection hangover: cattle, pasture land degradation and alternative land use in Central America por Ibrahim, Muhammad Akbar, Beer, John

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Modelling Pentaclethra forest - an important Central American lowland rain forest type - for timber production por Sitoe, Almeida, Finegan, Bryan, Camacho, Marlen

“…Although soils are poor, deforestation in this forest type, for pastureland or permanent crops such as citrus, has been extensive during recent decades. The remaining forest stands, are small fragments in protected areas or on privately owned land, of which, the latter is one of the main sources of timber in the countries mentioned. …”
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A landscape laboratory in Germany : reaching out for new landscape concepts por Hamm, Astrid

“…The highly industrialised "Ruhr" region in north-western Germany has undergone considerate structural changes over the past four decades, as industrialisation has seized and left the region with major challenges for its regional development in terms of urban planning, as well as social, economic, and environmental aspects. …”

Assessing trust in the Swedish survey system for large carnivores among stakeholders por Öhrman, Philip

“…The human-carnivore conflict in Sweden has been a fact for centuries. Dating back several decades, there has been a reversal in the management of large carnivores towards conservation instead of eradication. …”

Production of biomass from short rotation coppice for energy use : comparision between Sweden and Spain por Arias Navarro, Cristina

“…Social and economic scenarios show a constant growth in the demand for woodfuels and it is expected to continue for some decades (Sixto, 2007). To reach these goals, woody energy crops are necessary for assuring the sustainability of the rising biomass sector. …”