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Corn Phosphorus and Potassium Uptake in Response to Soil Compaction
Author(s) -
Dolan M. S.,
Dowdy R. H.,
Voorhees W. B.,
Johnson J. F.,
BidwellSchrader A. M.
Publication year - 1992
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1992.00021962008400040021x
Subject(s) - subsoil , compaction , agronomy , loam , soil compaction , environmental science , nutrient , axle load , phosphorus , soil water , soil science , chemistry , geology , biology , axle , geotechnical engineering , mechanical engineering , organic chemistry , engineering
Soil compaction by heavy axle load farm machinery can inhibit optimum plant growth. Uptake of essential nutrients, like P and K, is influenced by soil compaction. This study describes plant P and K accumulation from a compacted Webster (fine‐loamy, mixed, mesic Typic Haplaquolls) soil. Whole plant samples of corn ( Zea mays L.) were collected at the 75% vegetative‐tassel (VT) stage from 0, 9, and 18 Mg axle load subsoil compaction treatments, each with secondary interrow surface soil compaction of 0‐ or 4.5‐Mg axle loads. Subsoil compaction reduced P and K uptake as much as 22% during seasons when June and July rainfall was less than average. Subsoil compaction of 18 Mg did not consistently reduce P and K uptake more than did 9 Mg subsoil compaction. Surface soil compaction also reduced P uptake, but to a lesser extent than did subsoil compaction. Overall P and K uptake, across all treatments, was enhanced when June and July precipitation was average or wetter than the 30‐yr average.