drought, phosphorus deficiencies, corn, crop failure
Phosphorus deficiencies in corn may be more severe after crop failure due to drought. Extensive research in South Dakota has shown corn planted on fields which have been fallowed the previous year have severe phosphorus deficiency early in the season with yield reductions up to 30 bushels per acre. Complete crop failure due to drought could be considered fallow because little or nothing grows on the field.
Gerwing, James R., "Phosphorus Deficiencies After Drought" (1988). SDSU Extension Extra Archives. 257.