Fertilizer Management for Alfalfa - USDA
lbs/ton N 55.0 P (P 2 O 5) 10.0 K (K 2 O) 60.0 Ca 30.0 Mg 4.6 S 8.0 Zn 0.006 Cu 0.14 Mn 1.8 Fe 1.8 ... indicated, apply 1 pound of boron per acre. Boron fertilizer is often mixed and applied with other fertilizers because of the small amount needed. Do not apply boron near the seed.
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