Yazar
Stephen R Crutchfield
5 cilt bulundu.
Stephen R. Crutchfield · U.S. Dept. of Agriculture, Economic Research Service
18 sayfa · 1993
Agricultural chemicals / Agriculture and state / Economic aspects / Economic aspects of Water quality / Environmental aspects
Stephen R. Crutchfield · U.S. Dept. of Agriculture, Economic Research Service
27 sayfa · 1995
Agricultural pollution / Cost effectiveness / Economic aspects / Economic aspects of Agricultural pollution / Economic aspects of Water quality
Stephen R. Crutchfield · U.S. Dept. of Agriculture, Economic Research Service
33 sayfa · 1992
Cotton growing / Agricultural chemicals / Pollution prevention / Water quality
Stephen R Crutchfield · U.S. Dept. of Agriculture, Economic Research Service, Resources and Technology Division
17 sayfa · 1990
Agricultural chemicals / Cotton / Environmental aspects / Environmental aspects of Agricultural chemicals / Water quality
Stephen R. Crutchfield · U.S. Dept. of Agriculture, ERS
15 sayfa · 1997
Drinking water / Water quality / Nitrates / Purification