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The Potential Use of Gypsum for Improved Cotton Productivity

Source Publication:Summaries of Arkansas Cotton Research
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.

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