نتایج جستجو برای: agricultural inputs

تعداد نتایج: 163714  

2017
Yongxun Zhang Heyao Li Lulu He Lun Yang

Heritage conservation is an important recurring research theme on agricultural heritage systems. Improving the income of farmers from agriculture is regarded as an effective conservation approach. This study examined how the improved rice-fish-duck coculture (IRFDC) promotes the protection of the Honghe Hani Rice Terraced System (HHRTS) by keeping farmers farming in their hometowns. A semi-stru...

1998
Andrew McKay Oliver Morrissey Charlotte Vaillant

Tanzania is among the many African countries that have engaged in agricultural liberalisation since the mid-1980s, in the hope that reforms which introduce price incentives and efficient marketing will encourage producers to respond. This paper assesses that claim by examining the supply response of agricultural output in Tanzania. Our estimates suggest that agricultural supply response is quit...

Journal: :تحقیقات مهندسی کشاورزی 0
فاطمه میرزایی ندوشن دانش آموخته کارشناسی ارشد دانشگاه تهران سعید مرید دانشیار دانشگاه تربیت مدرس صالح ارشد دانش آموخته دکتری دانشگاه تربیت مدرس

agricultural drought has resulted in great damage to iran in recent years and it is crucial to cope with this adversity through logical management. one attempt in this regard is to compare affected sites and prioritize them for action plans. this paper develops a methodology for agricultural drought risk analysis based on rain-fed wheat data from kermanshah province and employs it to compare af...

2002
A. de Jager

Nutrients are transported all over the world through fertilizer imports, exports of agricultural commodities, massive erosion in some places and gross volatilization and leaching in high-input/high-output agricultural systems. In other words, more or less balanced natural ecosystems have turned into highly unbalanced agricultural systems. Figure 20.1 shows the inputs and outputs that make up th...

2017
Tigist Mekonnen

This paper provides empirical evidence regarding the impact of agricultural technologies on smallholders’ output market participation. The analysis is based on Farmer Innovation Fund impact evaluation survey collected by the World Bank in 2010-2012 covering 2,675 households in Ethiopia. Endogenous treatment effect and sample selection models are employed to account for the self-selection bias i...

2015
Cynthia Donovan

Agricultural productivity levels in Mozambique lag behind most of its neighbors that have climatic and socioeconomic similarities. Data from the World Bank (2012) indicate that the average cereal yields in 2011/12 in Mozambique were estimated at 700 kg/ha, which is three and four times lower than the average cereal yields in Malawi (2.1 ton/ha) and Zambia (2.7 tons/ha), respectively. The limite...

2005
Anil K. Rajvanshi

Modern agriculture is an extremely energy intensive process. However high agricultural productivities and subsequently the growth of green revolution has been made possible only by large amount of energy inputs, especially those from fossil fuels. With recent price rise and scarcity of these fuels there has been a trend towards use of alternative energy sources like solar, wind, geothermal etc....

2005
Peter Hazell Xinshen Diao

We also learnt much about the conditions under which agriculture-led growth is most likely to succeed. There are five key conditions. First, agricultural growth needs to be technologically driven so that output prices can fall while farm incomes increase. It is not enough to simply use more farm inputs like fertilizer and irrigation water and investments in productivity-enhancing agricultural r...

2012
Sergey Paltsev

Emissions mitigation policies affect prices, including prices for fossil fuels and agricultural products. Consumer prices for coal and natural gas are expected to rise when climate policy is implemented, while oil prices may be reduced or remain the same in comparison to a no policy scenario. Impacts on agricultural prices are more controversial as reduced negative productivity impacts on yield...

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