
TY  - JOUR
A1  - Taylor, AC 
A1  - Lill, WJ 
T1  - Response of soil mineral nitrogen to total nitrogen and land-use in a long-term study of wheat pasture rotations
JF  - Australian Journal of Experimental Agriculture
JO  - Aust. J. Exp. Agric.
Y1  - 1988
VL  - 28
IS  - 4
SP  - 525
EP  - 527
KW  - 
UR  - https://doi.org/10.1071/EA9880525 
N2  - All 6 treatments of a long-term wheat-pasture rotation experiment were soil sampled after a cultivated fallow close to sowing at Wagga Wagga. Analyses of the nitrogen (N) data show that total N (0-1 5 cm) could be used as a predictor of mineral N in the profile at sowing. Mineral N levels were expressed as a percentage of total N and reported as a mineralisation index. This index increased after a period of clover and was considerably higher for the first crop after pasture than for subsequent crops. The mineralisation index also increased as the pasture intensity (years pasture/total years) increased from 0.33 to 0.67. Total N alone accounted for no more than 20% of the variation in mineral N at sowing. The variance accounted for increased to 49.9 and 53.7% respectively when pasture frequency and crop number after pasture were included in the models. 
ER  -

