
%0 Journal Article
%A Chauhan, RPS 
%A Chauhan, CPS 
%T A modification to Schoonover's method of gypsum requirement determination of soil
%J Soil Research
%D 1979/08/01
%V 17
%N 2
%P 367-370
%K 
%R https://doi.org/10.1071/SR9790367
%U https://www.publish.csiro.au/paper/SR9790367 
%X During laboratory studies it was noted that water-soluble carbonate plus bicarbonate interferes with the determination of gypsum requirement (GR) by Schoonover's method and has significant correlation with the latter (r = 0.89). The interference of carbonate and bicarbonate can be eliminated through their precipitation as magnesium carbonate. A modified method to this effect is suggested hereby, and values of GR determined by this method are quite close (r = 0.99) to those of exchangeable sodium and give a fair approximation to it. 
