Grain Sorghum Response to Iron sources Applied alone or with Fertilizers

Mortvedta, J.J. (1982) Grain Sorghum Response to Iron sources Applied alone or with Fertilizers. Journal of Plant Nutrition , 5 (4-7). pp. 859-868.

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Several greenhouse pot experiments were conducted on Fe‐deficient soils to determine agronomic effectiveness of various Fe sources applied alone or with fertilizers. Grain sorghum (Sorghum bicolor) response was greatest with FeEDDHA in all experiments. Several industrial byproducts containing Fe generally were not effective, but seed application and soil application of a natural organic complex containing Fe were somewhat effective in providing Fe to the crop. Effectiveness of FeS04 or FeHEDTA band applied with fluid fertilizers decreased in the order: polyphosphate suspension, orthophosphate suspension, urea‐ammonium nitrate solution. Crop response was greater with FeHEDTA than with FeSO4, in all fertilizers. Band application of urea‐phosphate (UP), an experimental acidic phosphate fertilizer containing urea, cogranulated with FeSO4 (to contain 4% Fe) was somewhat effective for grain sorghum. Crop response to UP‐Fe products decreased with level of water‐soluble Fe and percentage of the total Fe remaining in the ferrous form. Results show that agronomic effectiveness of Fe sources applied with fertilizers varies widely, depending upon chemical reactions which occur during manufacture or after soil application.

Item Type: Article
Uncontrolled Keywords: Organic iron complex, iron chelate, iron sulfate, polyphosphate suspension, urea‐ammonium nitrate, urea phosphate, urea phosphate Fe, line induced chlorosis, Fe‐lignosulfonate, banding
Author Affiliation: National Fertilizer Development Center, Tennessee Valley Authority, Muscle Shoals, Alabama, 35660
Subjects: Plant Protection
Crop Improvement
Divisions: Sorghum
Depositing User: Library ICRISAT-InfoSAT
Date Deposited: 28 Mar 2012 14:24
Last Modified: 28 Mar 2012 14:24
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