Yazar
Edward H Koerkle
3 cilt bulundu.
Cilt sonuçları
Surface-water quality changes after 5 years of nutrient management in the Little Conestoga Creek headwaters, Pennsylvania, 1989-91
Edward H Koerkle · U.S. Geological Survey
43 sayfa · 1997
Environmental aspects / Environmental aspects of Plant nutrients / Nutrient pollution of water / Plant nutrients / Water quality
Trends in surface-water quality during implementation of best-management practices in Mill Creek and Muddy Run basins, Lancaster County, Pennsylvania
Edward H Koerkle · U.S. Dept. of the Interior, U.S. Geological Survey
Sayfa sayısı yok · 2000
Water quality
Evaluation of agricultural best-management practices in the Conestoga River Headwaters, Pennsylvania
Edward H Koerkle · Earth Science Information Center, Open-File Reports Section [distributor]
Sayfa sayısı yok · 1996
Nutrient pollution of water / Agricultural pollution / Water quality