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Evaluation of Starter Fertilizer and Amisorb(R) for Mid-South Cotton Production

M. W. Ebelhar, J. O. Ware and J. L. Oldham


 
ABSTRACT

Each year new products are introduced into the market place that have little research data to support their use but make bold claims as to the benefit in commercial cotton production. This study was designed to evaluate one product, Amisorb®; Nutrient Absorption Enhancer™ from Amilar International, along with starter fertilizer (ammonium poly-phosphate) in replicated field trials at the Delta Research and Extension Center, Stoneville, MS. The products were applied as either a 4-in band behind the planter press wheel or as a broadcast application immediately following planting. Lint yields were measured at two harvests following defoliation. Subsamples taken at harvest were ginned and used to determine lint yields. When average over years (1997 and 1998) total lint yields were not significantly affected by the starter fertilizer applications nor were they significantly affected by Amisorb rates. There were no significant interactions between main effects treatments so main effect means were determined. When average over years, total lint yields were 1152, 1165, and 1174 lb/acre for the 0, 1, and 2 qt Amisorb/acre rates, respectively. With respect to starter fertilizer (10-34-0), there was a very slight trend toward an increase in lint yield, however, there was no significant difference present. After examining data for two years, it appears that neither ammonium poly-phosphate nor Amisorb applied as a band or broadcast over the top would supply the producer with sufficient income to cover the cost of the material or the application cost. Planting on time, under optimum soil conditions, with a sound fertility program based on soil testing provides the best alternative.



Reprinted from Proceedings of the 1999 Beltwide Cotton Conferences pp. 1314 - 1319
©National Cotton Council, Memphis TN

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Document last modified Monday, Jun 21 1999