MATERIAL-ENERGY REQUIREMENTS IN ALTERNATIVE DAIRY FARMING SYSTEMS J. B. Holtman is associate professor of agricultural engineering, L. J. Connor is professor of agricultural economics, R. E. Lucas is professor of crops and soil science, and F. J. Wolak is undergraduate research assistant in agricultural engineering, Michigan State University, East Lansing, Mich. 48824. Michigan Agricultural Experiment Station Journal article No. 7694. This research was financed by the Michigan Agricultural Experiment Station and a grant from NSF/RANN entitled: Design and Management of Rural Ecosystems. Dr. G. C. Misener, Agriculture Canada, Fredericton, New Brunswick, developed and programmed an earlier version of the computer model used in this study

Autor:	R.E. Lucas, F. J. Wolak, J.B. Holtman, L.J. Connor
Rok vydání:	1977
Předmět:	Waste management business.industry Fossil fuel Agricultural engineering Energy consumption engineering.material Interchangeability Fuel gas engineering Production (economics) Fertilizer business Energy source Dairy farming
DOI:	10.1016/b978-0-12-454250-1.50036-8
Popis:	Resource requirements were estimated for four Michigan dairy farms with two rations and two waste handling systems. The main variation in energy consumption is associated with natural gas required to manufacture fertilizer and urea feed supplement. For a fixed output level, production costs were approximately constant for the four cases. The main resource interchangeability was between fossil fuel energy and land.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a60b21c724d47dee4b6977814d71a871 https://doi.org/10.1016/b978-0-12-454250-1.50036-8 Zobrazit plný text záznamu