Response of soybeans to amelioration of sodic soils with polyacrylamides
Sivapalan, Siva (2004) Response of soybeans to amelioration of sodic soils with polyacrylamides. In Raine, S.R., Biggs, A.J.W., Menzies, N.W., Freebairn, D.M., & Tolmie, P.E. (Eds.) 13th International Soil Conservation Organisation Conference, 4-9 July 2004, Brisbane, Queensland, Australia.
The effectiveness of polyacrylamides, gypsum, and their combination on improving the physical and chemical properties of a sodic soil was assessed in relation to the response of soybeans to such amelioration procedures. The results of a glasshouse study conducted in the 2002-03 summer season, clearly demonstrated that the polyacrylamides used either alone, or combined with gypsum, were effective in the amelioration of a sodic soil. It was also found that there was a significant beneficial effect on grain yield of soybeans when polyacrylamides and gypsum applications were combined. Soybean plants responded positively to such amelioration procedures. The application of polyacrylamides alone (10 kg/ha) increased the grain yield by 15%, but when combined with gypsum (25-100 kg/ha), polyacrylamides increased the grain yield by 22%. On the other hand, gypsum application alone (25-100 kg/ha) increased the grain yield by only 3%. These findings suggest that sodic soils could be ameliorated with the application of a low quantity of gypsum (25-100 kg/ha) combined with polyacrylamides (10 kg/ha). This may have great impact on large-scale reclamation of sodic soils in Australia, and consequently could significantly increase crop production in these soils.
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|Item Type:||Conference Paper|
|Keywords:||Polyacrylamides (PAM), sodicity, gypsum, reclamation, soybean|
|Subjects:||Australian and New Zealand Standard Research Classification > ENVIRONMENTAL SCIENCES (050000) > SOIL SCIENCES (050300) > Soil Chemistry (excl. Carbon Sequestration Science) (050304)
Australian and New Zealand Standard Research Classification > AGRICULTURAL AND VETERINARY SCIENCES (070000) > CROP AND PASTURE PRODUCTION (070300) > Agronomy (070302)
Australian and New Zealand Standard Research Classification > ENVIRONMENTAL SCIENCES (050000) > SOIL SCIENCES (050300) > Soil Physics (050305)
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering|
|Copyright Owner:||Copyright 2004 Siva Sivapalan|
|Deposited On:||17 Nov 2005|
|Last Modified:||09 Jun 2010 12:28|
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