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Phosphorus and Potassium
Yield responses to fertilizer phosphorus and potassium can be as dramatic with dry beans as with other crops commonly grown in North Dakota. Best yields are usually obtained on soils in which the residual level of these nutrients has been built up through god fertilization programs of previous crops. However, when soil test ratings are medium or lower, profitable yield increases can be expected from added P or K.
Broadcast applications have been shown to be effective when applied and plowed or disked in prior planting. However, the most efficient and profitable use of fertilizer P will be obtained if the fertilizer is placed in a band 1 to 2 inches to the side and 2 inches below the seed, especially on low and very low testing soils.
Dry beans are susceptible to damage if fertilizer is placed in contact with the seed. If planting equipment is not capable of placing the fertilizer to the side and below the seed, then broadcast all fertilizer and work it into the soil.
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