The effects of liming on the liberation of Potassium in some Iowa soils Dean, Hartzell
dc.contributor.department Extension and Experiment Station Publications 2018-02-18T12:47:47.000 2020-06-30T06:57:07Z 2020-06-30T06:57:07Z 2017-05-31 2017-05-31
dc.description.abstract <p>The effects of lime on the liberation of potassium in a number of Iowa soils were studied in a series of experiments and the results obtained are summarized as follows:</p> <p>1. Analyses of 12 high-lime soils showed that all of the soils contained relatively large amounts of total potassium, carbonates and total nitrogen.</p> <p>2. The available potassium content of 11 of the 12 high-lime soils was insufficient for maximum plant growth according to the Aspergillus niger test. This low content of available potassium was correlated with the high carbonate content.</p> <p>3. The exchange complex of an acid Tama silt loam was completely saturated by applications of 6 tons of calcium carbonate per acre in greenhouse experiments and 6 months after treatment the amounts of exchangeable and available potassium were decreased.</p> <p>4. Calcium carbonate, calcium chloride and calcium hydroxide replaced potassium and increased the available potassium in the soil exchange complex in acid Tama silt loam and to a smaller extent in basic Webster silty clay loam, calcium chloride being the most effective. Calcium sulfate had little or no effect on the exchangeable and available potassium.</p> <p>5. The availability of potassium in high-lime soils was lower in inoculated than in uninoculated soils and the decrease in availability was greater in soils treated with calcium carbonate than in the untreated soils.</p> <p>6. It is suggested that a decreased hydrolysis of primary potassium-bearing minerals and the formation of insoluble potassium complexes and possibly also a reduction in available potassium by microorganic activity may be responsible, in part at least, for the decreased availability of potassium in these soils.</p>
dc.identifier archive/
dc.identifier.articleid 1211
dc.identifier.contextkey 10230897
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath researchbulletin/vol17/iss197/1
dc.source.bitstream archive/|||Fri Jan 14 17:39:39 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Agronomy and Crop Sciences
dc.title The effects of liming on the liberation of Potassium in some Iowa soils
dc.type article
dc.type.genre article
dspace.entity.type Publication
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relation.isOrgUnitOfPublication 302bd0e8-f82f-406a-88b5-c8f956b5f77b
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