K. R. Helyar

Soil acidity in New South Wales ― current pH values and estimates of acidification rates

K. R. Helyar, P. D. Cregan, D. L. Godyn, 1990 .

Modeling acidification processes in agricultural systems.

Andrew D. Moore, Zvi Hochman, Richard J. Simpson, 2003 .

Simulation of seasonal stalk water content and fresh weight yield of sugarcane

De Li Liu, K. R. Helyar, 2003 .

2 – Soil Acidification, its Measurement and the Processes Involved

K. R. Helyar, A. Robson, K. Helyar, 1989 .