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Selenium Concentrations in Phosphorus Fertilizer Materials and Associated Uptake by Plants

Robbins, C.W. and Carter, D.L. (1970) Selenium Concentrations in Phosphorus Fertilizer Materials and Associated Uptake by Plants. Soil Science Society of America Proceedings. 34(3):506-509.


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The Se concentration of seven Florida Land Pebble deposit phosphate rocks ranged from 0.7-7.0 ppm. The range was 1.4-1.78 ppm Se in seven samples from the western phosphate field. The Meade Peak phosphatic shale member of the Phosphoria formation contains more Se than rock from other phosphatic formations. Normal and concentrated superphosphates made from phosphatic rocks containing 100 ppm Se can be expected to contain about 60 and 40 ppm Se, respectively. Laboratory-prepared concentrated superphosphate containing 23 ppm Se applied to an alkaline soil that normally produced alfalfa (Medicago sativa L.) low in Se at a rate of 156 ppm P increased Se concentration in alfalfa above the minimal requirements to protect livestock from white muscle disease. Concentrated superphosphate and single superphosphate prepared from phosphate rock containing 178 ppm Se and applied at a rate of 80 ppm P increased the Se concentration in alfalfa compared to the same amount of P applied as Se free concentrated superphosphate. Normal phosphate fertilizer practices can provide required Se for livestock provided the fertilizer is prepared from phosphate rock containing sufficient Se.

Item Type: Article
NWISRL Publication Number: 0178
Subjects: Soil > Amendments > Fertilizer
Mass Import - autoclassified (may be erroneous)
Depositing User: Dan Stieneke
Date Deposited: 20 Nov 2010 21:51
Last Modified: 01 Mar 2017 23:50
Item ID: 194

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