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Interaction of Ammonium and Potassium in a Potassium‐Fixing Soil
Author(s) -
Bartlett R. J.,
Simpson T. J.
Publication year - 1967
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/sssaj1967.03615995003100020023x
Subject(s) - potassium , loam , chemistry , ammonium , agronomy , extraction (chemistry) , nitrification , soil water , nitrogen , chromatography , biology , soil science , environmental science , organic chemistry
Different levels of NH 4 and K were supplied to a K‐fixing soil (Buxton silt loam) containing the nitrification inhibitor 2‐chloro‐6‐(trichloromethyl) pyridine. Maize ( Zea mays L.) seedlings were grown in the soil under controlled conditions.When K was equilibrated with this soil first, adidtion of NH 4 had almost no effect on the availability of K, as indicated by extraction with NaOAc or by uptake of maize seedlings. Equilibration of the soil with NH 4 , before the addition of K, increased the amount of K extracted, increased the percentage of K in the p ants, and increased the yields of seedlings. Addition of NH 4 at the same time as K was at least as effective as its addition before K in increasing yields as we 1 as amount of K taken up by the plants or extracted chemically from the soil.