A new study that analyzed US Department of Agriculture Census of Agriculture data spanning two decades (1987-2007) shows that the statistical magnitude, existence, and direction of the relationship between landscape simplification -- a term used for the conversion of natural habitat to cropland -- and insecticide use varies enormously year to year.
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/y...
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/y...