Corn and Soybean Grain Phosphorus Content Relationship with Soil Phosphorus, Phosphorus Fertilizer, and Crop Yield

P. M. Anthony, G. L. Malzer, S. D. Sparrow, M. Zhang

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Most fertilizer phosphorus (P) rate recommendations for the north-central United States are based on combination of a critical soil-test P value and a mass-balance calculation of fertilizer P required to maintain critical soil-test P. Accurate estimates of grain P removal are an essential component of P mass-balance calculation. Current north-central extension service guidelines recommend that estimates of corn and soybean grain P removal should be calculated using constant grain P concentrations. We reviewed research from the north-central region to determine the extent to which variation in grain P concentration accounts for differences in crop P removal and to determine whether predictions of grain P concentration can be improved through consideration of soil-test P, crop yield, and fertilizer P application. We found that soil-test P, grain yield, and fertilizer P are predictor variables that may significantly improve estimates of grain P concentration for corn and soybeans.

Original languageEnglish (US)
Pages (from-to)1056-1071
Number of pages16
JournalCommunications in Soil Science and Plant Analysis
Volume44
Issue number6
DOIs
StatePublished - Mar 2013

Keywords

  • Crop removal
  • grain phosphorus concentration
  • phosphorus

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