Carl Rosen, Extension Soil Scientist - Department of Soil, Water and Climate, University of Minnesota Nov. 27, 1996
Sustane 4-6-4 organic fertilizer applied at 1.88 tons* per acre produced garlic yields comparable or better than U of M composted cow manure applied at 32 tons per acre. Sustane 4-6-4 also produced garlic yields comparable or better than the inorganic fertilizer treatment.