Research Article Open Access


Walter B. Gordon1, Larry Murphy2 and Pawel Wiatrak3
  • 1 Department of Agronomy, Kansas State University, Manhattan, Kansas, United States
  • 2 Murphy Agro, Manhattan, Kansas, United States
  • 3 School of Agricultural, Forest and Environmental Sciences, Clemson University, Edisto REC, Blackville, United States


Phosphorus (P) generally occurs in soils as the anions H2PO4- or HPO4-2 depending on soil pH. These anions readily react with soil cations such as calcium, magnesium, iron and aluminum to produce various phosphate compounds of very limited water solubility. Crop recovery of applied phosphate fertilizer can be quite low during the season of application. In addition, the large amounts of crop residue present in no-tillage production systems can lower soil temperature thus reducing root growth and nutrient uptake of plants even on soils not low in available Phosphorus (P). Specialty Fertilizer Products, Leawood, KS has developed and patented a product registered as AVAIL® that is reported to attract and sequester antagonistic cations out of the soil solution leaving more of the applied P in available form for plant uptake. The objective of this experiment was to evaluate the effectiveness of AVAIL treated P-fertilizer on growth, P-uptake and yield of irrigated corn (Zea mays L.) grown in a no-tillage production system. A 3-year experiment was conducted from 2001-2003 at the North Central Kansas Experiment Field, located near Scandia, KS, on a Crete silt loam soil (fine, montmorillonitic, mesic Pachic Arquistoll). Treatments consisted of three rates of P with or without AVAIL. A no P check plot was also included. When averaged over the years and P rates, the use of AVAIL increased yield of corn by 1.1 Mg ha-1. AVAIL also increased corn dry weight at the six-leaf stage, whole plant P uptake at the six-leaf stage and P concentration at mid-silk. The use of AVAIL proved beneficial in overcoming many of the problems associated with P nutrition in corn. AVAIL consistently increased P uptake and yield in this experiment.

American Journal of Agricultural and Biological Sciences
Volume 9 No. 3, 2014, 294-298


Submitted On: 10 March 2014 Published On: 18 March 2014

How to Cite: Gordon, W. B., Murphy, L. & Wiatrak, P. (2014). IMPROVING PHOSPHORUS NUTRITION OF CORN. American Journal of Agricultural and Biological Sciences, 9(3), 294-298.

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  • Corn
  • Avail
  • Corn
  • Phosphorus