Yazar
dennis r keeney
5 cilt bulundu.
Cilt sonuçları
Sustainability of agricultural systems in transition
Dennis R. Keeney · Crop Science Society of America
272 sayfa · 2001
Agricultural systems / Congresses / Sustainable agriculture
The fate of nitrogen in aquatic ecosystems
Dennis R. Keeney · University of Wisconsin, Water Resources Center, Eutrophication Information Program
59 sayfa · 1972
Aquatic ecology / Nitrogen cycle
Protocol for evaluating the nitrogen status of lake sediments
Dennis R. Keeney · For sale by the Supt. of Docs., U.S. Govt. Print. Off.
25 sayfa · 1974
Nitrogen / Silt / Water / Nitrogen content
The Keeney Place
Dennis R. Keeney · Levins Publishing
110 sayfa · 2015
Sustainable agriculture / Agriculture / Leopold Center for Sustainable Agriculture / Biography
Bugs in the system
William Vorley, Dennis R. Keeney · Earthscan Publications
222 sayfa · 1998
Pesticides industry / Pesticides / Environmental aspects / Sustainable agriculture / Economic aspects