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McCracken, J.L
Wolkowski, R.P
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Authors
Wollenhaupt, N.C
Wolkowski, R.P
Reetz Jr, H.F
Bernards, M.L
Thelen, K.D
Penner, D
Muthukumaran, R.B
McCracken, J.L
Topics
Type
Oral
Year
1993
2003
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1. Variable-Rate Fertilizer Application- Update and Economics

The potential for application of computer-controlled, satellite-guided, variable-rate application systems for fertilizer has opened an interesting new area of research and development. While variable-rate application is not new--and does not require the com- puter or satellite systems to be useful--the technology is definitely helping to convince dealers and farmers that this concept has broader potential. Economic pressures and environmental concerns are leading them to take a closer look at how...

2. Manganese Fertilizer Antagonism of Glyphosphate Efficacy

Michigan soybean producers have observed antagonism of glyphosate efficacy in tank mixtures with foliar manganese (Mn) fertilizers. The objectives of this study were to (1) evaluate four Mn fertilizer formulations for their effect on glyphosate activity. (2) evaluate the effect of Mn fertilizer application timing on glyphosate activity, (3) evaluate the efficacy of three adjuvants in overcoming the Mn fertilizer antagonism of glyphosate. (4) determine the spray solution ratio of h4n2' and glyphosate...