
TY  - JOUR
A1  - McKenzie, DC 
A1  - So, HB 
T1  - Effect of gypsum on vertisols of the Gwydir Valley, New South Wales. 2. Ease of tillage
JF  - Australian Journal of Experimental Agriculture
JO  - Aust. J. Exp. Agric.
Y1  - 1989
VL  - 29
IS  - 1
SP  - 63
EP  - 67
KW  - 
UR  - https://doi.org/10.1071/EA9890063 
N2  - An experiment was carried out to deter- mine the effect of applied gypsum on the ease of tillage in 3 vertisols of the Gwydir Valley, New South Wales. The soils were classified as 'poor' and 'good' on the basis of past dryland wheat yields and structural of their surface aggregates.Where gypsum had been applied 22 months earlier at a rate of 7.5 t ha-1, tractor fuel consumption per centimetre of soil tilled was reduced by as much as 37% (0.85 v. 0.54 L ha-1 cm-1). The effect was most marked on the more sodic clays. The reduction in fuel consumption due to gypsum was associated with instability creased soil water content (0.127 v. 0.224 kg kg-1) and lower soil strength (330 v. 140 kPa). 
ER  -

