Pollination is a well-studied and at the same time a threatened ecosystem service. A significant part of global crop production depends on or profits from pollination by animals. Using detailed information on global crop yields of 60 pollination dependent or profiting crops, we provide a map of global pollination benefits on a 5' by 5' latitude-longitude grid. The current spatial pattern of pol...

In the less developed parts of southern Africa, where agriculture is crucial in daily survival, agricultural lime is often difficult to obtain. This is due to the scarcity of production sites, high transport costs and inadequate support for farmers from government extension services. In Zambia there are upwards of 700,000 small-scale farmers who struggle to farm on acid soils and as a result ha...

the purpose of this study was to determine students’ attitudes toward international agricultural issues. the population for the study consisted of agricultural extension students at tehran and shiraz universities, agriculture and natural resources colleges’ (n= 170). a stratified random sampling technique was employed to select samples, (n= 120). the study was conducted during the fall 2007 usi...

The country's economy is dependent on many variables that play a role in growth and development of the country. There are many variables in the economy that effect on country's economy. On the other hand rainfall is one of important factor of climate change that affected on economic strategic programs such as agriculture sector programs. Rainfall Changes effect on many economic variables that i...

This paper provides empirical evidence of an U-shaped relationship between the extent of the market (size of the relevant urban market) and the pattern of crop specialization in a village economy. We use the recent two-stage estimator developed by Lewbel (2007) and exploit heteroskedasticity for identification of the causal effects of market size. The results suggest that the portfolio of crops...

Most agribusiness firms are small. Regardless of the measurements or standards employed, this assertion remains valid. It is perhaps, the natural end product of our free enterprise economy, where entrepreneurial spirit remains more pervasive than the economies of size. Or perhaps this characterization of the agribusiness industry is linked inseparably to the very atomistic nature of our total a...