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Source Publication: | Summaries of Arkansas Cotton Research |
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Primary Author: | Espinoza, Ismanov, Ballantyne |
State: | Arkansas |
Date/Year: | 2009 |
Focus: | Water infiltration, aluminum solubility, cotton root growth |
Category: | Proceedings & Bulletins & Research Reports |
Crop: | Cotton |
Download: | Potential Use of Gypsum for Improved Cotton Productivity .pdf (237.6 KB) |
Reported Results: | Soil water storage appeared to be positively impacted by gypsum applications. Soil pH showed significant stratification, with top soil samples averaging a 6.6 water pH, but samples down to 18 inches tested an average of 4.3 for water pH. This acidity level is directly correlated to excessive aluminum solubility, resulting in toxic levels for optimum root growth. Plants from the control and 2 T/acre treatments were studied for root tip length as related to treatment effect. Average root tips lengths from the control plots was 11 inches, compared to 19 inches for the 2 T/acre. Gypsum appears to be a feasible alternative to correct subsoil aluminum toxicity, as lime will not move down to such depths due to reduced CaCO3 solubility. |