Crop gross primary productivity (GPP) is an important characteristic for evaluating crop nitrogen content and yield, as well as the carbon exchange. Based on the close relationship observed between GPP and total chlorophyll content in crops, we applied a model that relies on a product of chlorophyll-related vegetation index and incoming photosynthetically active radiation for remote estimation ...

the benefits of information and communication technologies (icts) for agricultural extension purposes and activities are obvious. the main objective of this article is to identify encouraging and discouraging factors in application of icts in agricultural extension in isfahan province of iran. this study investigated areas of icts application by extension workers (ews), too. the research design...

This study attempts to empirically examine the impact of democracy on agricultural productivity by estimating a cross-country agricultural production function. In the regressions, we control the education, economic freedom, climate and geographic variables, in order to see if democracy can still explain a significant portion of the heterogeneity of agricultural productivities across countries. ...

Renewed interest in converting biomass to biofuels such as ethanol, other forms of bioenergy, and bioenergy byproducts or coproducts of commercial value opens opportunities for chemists, including agricultural chemists and related disciplines. Applications include feedstock characterization and quantification of structural changes resulting from genetic modification and of the intermediates for...

Worldwide some seventy percent of all workers are engaged in agriculture. While there are differences between developed and developing countries, there are similarities as to the hazards faced, and as the developing world uses more farm related chemicals and more equipment hazards seen in the developed countries will be seen more frequently in developing countries. Much of the risk of agricultu...

The purpose of this report is to review the literature on cancer among persons employed in agriculture, to characterize the value of this line of research, and to recommend future directions. Farmers, despite a generally favorable mortality, appear to experience elevated rates for several cancers, including leukemia, non-Hodgkin's lymphoma, multiple myeloma, soft-tissue sarcoma, and cancers of ...

nowadays, agricultural r&d provides new and developed technologies to create modern agricultural producing methods. during recent years, improving agricultural productivity is affected by not only domestic r&d investments but also foreign countries r&d investments. nowadays, according to new growth models, r&d is the base of productivity. recent economic theories consider agricu...

there are no known studies that have been conducted focusing on the congruency or discrepancy of pre service agricultural education programmes in relation to secondary school agriculture teaching in zimbabwe. the purpose of this study was therefore to make a qualitative investigation on the contribution of pre service agricultural education training programmes to the teaching of high school agr...

This paper investigates the growth experience of one country in detail in order to enhance our understanding of important factors that a¤ect economic growth. Using a two sector model we identify the low productivity growth in the agricultural sector as the main reason for the divergence of income per capita between Turkey and its peer countries. An extended model that incorporates distortions i...

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.