A Progress review of Iowa's agricultural-energy-environmental initiatives :
nitrogen management in Iowa : a joint report from the Integrated Farm Management Project, the Model Farms Demonstration Project and the Big Spring Basin Demonstration Project /
prepared by G.R. Hallberg ... [et al.].

APA Citation

Hallberg, G. R., Big Spring Basin Demonstration Project., Model Farms Demonstration Project., Integrated Farm Management Demonstration Project (Iowa)., Iowa. Dept. of Natural Resources. Geological Survey Bureau. (1991). A Progress review of Iowa's agricultural-energy-environmental initiatives: nitrogen management in Iowa : a joint report from the Integrated Farm Management Project, the Model Farms Demonstration Project and the Big Spring Basin Demonstration Project. Iowa City, Iowa: Iowa Dept. of Natural Resources, Energy and Geological Resources Division, Geological Survey Bureau.

MLA Citation

Iowa. Dept. of Natural Resources. Geological Survey Bureau, et al.. A Progress Review of Iowa's Agricultural-energy-environmental Initiatives: Nitrogen Management In Iowa : a Joint Report From the Integrated Farm Management Project, the Model Farms Demonstration Project And the Big Spring Basin Demonstration Project. Iowa City, Iowa: Iowa Dept. of Natural Resources, Energy and Geological Resources Division, Geological Survey Bureau, 1991.

Warning: These citations may not always be complete (especially for serials).