IMPROVED GROWTH AND YIELD OF CROPS FROM ORGANIC SUPPLEMENTS S. K. Ries is professor, H. Bittenbender, R. Hangarter, L. Kolker and G. Morris are graduate students, and V. Wert is laboratory technician, Dept. of Horticulture, Michigan State University, East Lansing, Mich. 48824. Michigan Agricultural Experiment Station Journal Article No. 7431.
1977 ◽
pp. 377-393
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2002 ◽
Vol 18
(3)
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pp. 193-201
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2003 ◽
Vol 19
(2)
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pp. 144-149
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1969 ◽
Vol 72
(2)
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pp. 273-276