Foreign workers have been an important part of U.S. labor-intensive segments of agriculture throughout U.S. history. Typically, these are specialty crops such as tree crops, vegetables, and nursery and greenhouse crops. Each requires large amounts of labor relative to other resources used in production. Tree crop and vegetable production on only has very large labor requirements, but the requir...

The objective of this paper is to provide an analysis of particulate metal emissions in the USA. The analysis will identify natural and industrial sources, environmental standards, emission trends, and controls of particulate emissions. Since the majority of airborne metal emissions originate from metal industries and electric utility facilities, environmental and worker assessments of exposure...

Wetlands provide valuable ecosystem services to society. Yet, in many parts of the world, wetlands have been degraded or lost, and demand for development—particularly from agriculture—is putting pressure on many of those that remain. Policymakers and planners have to consider a bewildering set of biophysical, economic and social factors when deciding whether or not wetlands should be developed ...

In this work we tried to solve some non-linear problems of analytic photogrammetry. These problems are also widely flowed into the digital photogrammetry. The model formation considering the solution of the Relative Orientation, and the object reconstruction considering the solution of the Absolute Orientation have non-linear functional models. These models need an exhaustive research of the pr...

This paper highlights on the increasing fears that chemicals in agriculture have found their way into drinking water causing health complications. In fact many chemicals have not had these effects but waiting to do so by moving into groundwater sinking slowly and finally going into taps. Nitrate fertilizer is largely blamed for these fears. Use of fertilizers obviously would increase manifold t...

It is in this connection that it becomes very difficult at times for the agricultural scientist and practical agriculturist to meet on common ground, for very often a popular version of scientific reasoning may appear ambiguous, and in this case it would appear better to sacrifice the facile version (since the layman can always get an interpreter to explain if he is sufficiently interested) tha...

Agriculture remains a sensitive issue during multilateral trade negotiations within the World Trade Organization (WTO). Similar problems arise at the bilateral level, as in the case of trade talks between the United States and the Dominican Republic. The study explores the determinant of agricultural industry competitiveness in the 21st century, particularly in the case of U.S. and Dominican ag...