
%0 Journal Article
%A Perrott, KW 
%A Sarathchandra, SU 
%T Seasonal variations in soil S flush and possible contributions from plant roots in the measurement of soil microbial sulfur, phosphorus, potassium and nitrogen
%J Soil Research
%D 1990/10/01
%V 28
%N 5
%P 747-753
%K 
%R https://doi.org/10.1071/SR9900747
%U https://www.publish.csiro.au/paper/SR9900747 
%X The seasonal changes of the flush of soil sulphur (S) after CHCl3 fumigation were studied in a two-year field trial on a high-producing pastoral soil. The pattern was different from that observed for microbial P, and this may be explained by seasonal changes in the contribution of roots to the soil S flush. Roots extracted from sieved (<4 mm) soil were used to estimate the contribution of plant roots in the determination of soil microbial P, K, N and S. Increases in P, K and N extracted from roots after CHCl3 fumigation made only a small contribution to the increases for the soil (4%, 2% and 7% for P, K and N respectively). The contribution of roots to the increase in S extracted from soil after fumigation was about 22%. 
