نتایج جستجو برای: agricultural water productivity

تعداد نتایج: 706292  

Evangeline N. Ajani Mary O. Agada,

Agriculture is an important engine of growth and poverty reduction in much of Africa, Nigeria inclusive. But the sector is underperforming in part because women, who are often crucial resource in agriculture and rural economy, face constraints that reduce their productivity. An understanding of these constraints is a prerequisite to devising policies to improve agricultural production and produ...

Agricultural residues and various other materials are currently being used as additives to improve the physical and chemical properties of soil. Iran is located in an arid and semiarid region, so using strategies to reduce water use will reduce the problem water scarcity. The use of superabsorbent to increase water uptake and retention is one of the solutions that have been applied to improve w...

2015
J. Jägermeyr D. Gerten J. Heinke S. Schaphoff M. Kummu W. Lucht

Global agricultural production is heavily sustained by irrigation, but irrigation system efficiencies are often surprisingly low. However, our knowledge of irrigation efficiencies is mostly confined to rough indicative estimates for countries or regions that do not account for spatiotemporal heterogeneity due to climate and other biophysical dependencies. To allow for refined estimates of globa...

1998
Marina Mathew

The literature on the stylised facts of structural change in LDCs has been bedevilled by three problems: (i) drawing time-series inferences from cross-section results; (ii) endogeneity of the variables involved; and (iii) an inability to separate short-run from long-run effects. This paper uses time-series econometric techniques to address each of these problems investigating linkages between a...

Journal: :The Science of the total environment 2016
Samuel J Smidt Erin M K Haacker Anthony D Kendall Jillian M Deines Lisi Pei Kayla A Cotterman Haoyang Li Xiao Liu Bruno Basso David W Hyndman

In modern agriculture, the interplay between complex physical, agricultural, and socioeconomic water use drivers must be fully understood to successfully manage water supplies on extended timescales. This is particularly evident across large portions of the High Plains Aquifer where groundwater levels have declined at unsustainable rates despite improvements in both the efficiency of water use ...

2015
K. DomansKa T. KijeK

DomansKa, K., T. KijeK and a. nowaK, 2014. agricultural total factor productivity change and its determinants in european Union countries. Bulg. J. Agric. Sci., 20: 1273-1280 The present study concerns the measurement of changes in agricultural total factor productivity in 27 european Union (eU) countries. The analysis included the years 2007--2011. The study was conducted based on malmquist pr...

2016
J. J. Farrar M. E. Baur S. F. Elliott

Integrated pest management (IPM) is a method of reducing economic, human health, and environmental risks from pests and pest management strategies. There are questions about the long-term success of IPM programs in relation to continued use of pesticides in agriculture. Total pounds of pesticides applied is a mis-measure of the impact of IPM in agriculture. A more complete measurement of the lo...

Journal: :international journal of agricultural science, research and technology in extension and education systems 2014
mary o. agada evangeline n. ajani

agriculture is an important engine of growth and poverty reduction in much of africa, nigeria inclusive. but the sector is underperforming in part because women, who are often crucial resource in agriculture and rural economy, face constraints that reduce their productivity. an understanding of these constraints is a prerequisite to devising policies to improve agricultural production and produ...

Onwuchekwa Raphael Iheke, Ukandu Ihuoma

This study examined the effect of urbanization on agricultural production in Abia State. Specifically, it categorized the land tenancy status of the farmers, analyzed the effect of urbanization on agricultural productivity and identified the constraints to agricultural productivity. Multistage random sampling technique was used to select the respondents. Primary data collected using structured ...

2010
William Lin Yao-Chi Lu

This report reviews the concept and measurement of agricultural productivity with special references to USDA multifactor productivity statistics. An American Agricultural Economics Association task force has examined the sources and procedures used in constructing the existing statistics and recommends that USDA: (1) place greater emphasis on improving methodology; (2) move further toward a com...

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