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The Relationship of Water Soluble and Exchangeable Potassium to Yield and Potassium Uptake by Ladino Clover
Author(s) -
Hood J. T.,
Brady N. C.,
Lathwell D. J.
Publication year - 1956
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/sssaj1956.03615995002000020022x
Subject(s) - potassium , leaching (pedology) , chemistry , water soluble , agronomy , soil water , yield (engineering) , electrolyte , zoology , soil science , environmental science , materials science , organic chemistry , electrode , biology , metallurgy
An attempt was made to evaluate in a relative way the K in the soil solution as a measure of the immediately available potassium in the soil. When the K content of Ladino clover was below the critical level, the water soluble potassium, a measure of the K in the soil solution, was better correlated with yield than was exchangeable K. The water soluble potassium also gave a better correlation with the potassium absorbed by plants in a short period of time. A percolation procedure which consisted of leaching a soil with a large volume of a low electrolyte extractant was a better measure of the K supplying power of a soil than the initial exchangeable level of potassium.