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Potassium Accumulation and Movement In an Irrigated Soil Treated With Animal Manures
Author(s) -
Pratt P. F.,
Laag A. E.
Publication year - 1977
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1977.03615995004100060023x
Subject(s) - potassium , manure , zoology , chemistry , saturation (graph theory) , soil horizon , nitrogen , agronomy , soil water , soil science , environmental science , mathematics , biology , organic chemistry , combinatorics
Abstract Data from a 4‐year experiment with animal manures are reported. Soluble and exchangeable K and K/Cl ratios indicated that K moved into the 90‐ to 120‐cm depth, but little if any moved below the 120‐cm depth. Potassium/Cl ratios indicated that K moved down in a relatively abrupt front, that the 0‐ to 30‐cm and 30‐ to 60‐cm depths had nearly equilibrated with the K input, but that deeper layers had not. Soluble K accumulated in the soil in proportion to the amount of manure added and reached a maximum of 36.5% of the total soluble cations in the saturation extract of the surface layer of the plots that received the highest rate of manure. The maximum exchangeable K was found in the 30‐ to 60‐cm depth of the same plots. The K fixed in the soil appeared to be greater than the reduction in CEC.