TY - JA AU - Tanner,D.G. AU - Amanuel Gorfu AU - Asefa Taa TI - Fertilizer effects on sustainability in the wheat-based small-holder farming systems of southeastern Ethiopia PY - 1993/// KW - Ethiopia KW - Fertilizer application KW - Highlands KW - Ph KW - Soil deterioration KW - Nitrogen fertilizers KW - AGROVOC KW - Farming systems N1 - Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0378-4290 T2 - Field Crops Research ER -