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Published in Soil Sci Soc Am J 17:375-378 (1953)
© 1953 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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The Availability of High-Temperature Process Alkali (Rhenania-Type) Phosphates to Crops When Applied to Calcareous Soils1

W. R. Schmehl and E. J. Brenes2

ABSTRACT

Four field experiments were conducted on two soil types to test the effectiveness of high-temperature alkali (Rhenania-type) phosphate fertilizers on calcareous soil. The results showed that Rhenania-type phosphate and concentrated superphosphate had about the same fertilizer value for crops grown on phosphate-deficient soils when the fertilizer was plowed under or broadcast, but there were indications that Rhenania-type phosphate was less effective than superphosphate when the fertilizer was side-dressed. Laboratory studies using various procedures for the determination of available soil phosphorus showed that Rhenania phosphate and concentrated superphosphate were equally effective in increasing the available phosphorus in the soil. The results indicate that the Rhenania-type phosphates offer promise as substitutes for superphosphate under many cropping conditions.

NOTES

1 Contribution from the Agronomy Section, Colorado Agr. Exp. Sta. The work was supported in part by a fellowship grant from the Ideal Cement Co. Authorized by the Director of the Colorado Agr. Exp. Sta. for publication as Scientific Journal Series No. 404. Presented before Division IV, Soil Science Society of America, Cincinnati, Ohio, Nov. 21, 1952.

2 Associate professor and graduate.

Received for publication February 2, 1953.




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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
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Environmental Quality		 The Plant Genome
Copyright © 1953 by the Soil Science Society of America.