نتایج جستجو برای: agricultural total factorproductivity

تعداد نتایج: 890560  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Xin-Zhong Liang You Wu Robert G Chambers Daniel L Schmoldt Wei Gao Chaoshun Liu Yan-An Liu Chao Sun Jennifer A Kennedy

The sensitivity of agricultural productivity to climate has not been sufficiently quantified. The total factor productivity (TFP) of the US agricultural economy has grown continuously for over half a century, with most of the growth typically attributed to technical change. Many studies have examined the effects of local climate on partial productivity measures such as crop yields and economic ...

Journal: :Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi) 1995

1998
Robert C. Allen

Estimates of the employment structure, agricultural output, and agricultural labour productivity are developed for the leading European countries from 1300 to 1800. The employment estimates are developed from estimates of the total, urban, and rural populations. The output estimates are derived by positing a demand curve for agricultural goods.

Journal: :Journal of environmental quality 2002
Shelley Gustafson Deane Wang

This study examined the effects of agricultural runoff on the vegetation structure of Franklin Bog, a priority conservation area located in a rapidly developing region of northwestern Vermont. Forested and agricultural runoff from the mixed land use watershed created differential vegetation patterns in the wetland, including weedy species introductions. Concentrations of nitrogen and phosphorus...

2005
Eduard Matveev

This presentation provides comparative analysis of agricultural holdings in Estonia based on the Farm Accountancy Data Network (FADN) data. The FADN data for reference years 2000, 2001, 2002 and 2003 have been analysed. The FADN data analyses showed, that there are very big differences in the structure of the agricultural holdings. Individual farms represent ca 92% of the total population of ag...

2009
Munenobu Ikegami Michael R. Carter Jean-Paul Chavas Salvador Navarro Laura Schecter James R. Walker

We ask whether prime-age adult mortality due to HIV/AIDS decreases the endowment of knowledge for agricultural production in Kagera, Tanzania, reducing total factor productivity. We also quantify how much this negative effect contributes to the decrease in long-term household agricultural income growth compared to the contribution of decreased accumulation of productive assets; household member...

رضایی, بیژن, نجف پور, هدا,

     The present study aims to identify the entrepreneurship development strategies in agricultural sector based on agricultural expert’s views of Science and Technology Park of Kermanshah. The research method study applied in terms of purpose and descriptive-survey in terms of data collection. The population consisted of entire managers of agricultural sectors wich co...

2016
Zhiwei Wang Shengtian Yang Changsen Zhao Juan Bai Hezhen Lou Ke Chen Linna Wu Guotao Dong Qiuwen Zhou Mustafa M. Aral

The transport characteristics of phosphorus in soil and the assessment of its environmental risk have become hot topics in the environmental and agricultural fields. The Sanjiang Plain is an important grain production base in China, and it is characterised by serious land use change caused by large-scale agricultural exploitation. Agricultural inputs and tillage management have destroyed the so...

2003
M. M. Gutierrez Luciano Gutierrez

This paper analyses, within the new growth theory framework and using panel cointegration techniques, the effect of agricultural international technological spillovers on total factor productivity growth for a sample of 47 countries during the period 1970-1992. The analysis shows that total factor productivity is strongly influenced by domestic as well as foreign public R&D spending in agricult...

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