Soil test interpretation : proceedings of a sympossium held at Dubbo in February 1990 /
compiled by C. L. Mullen , A. M. Kay and R. D. Pugh.
- Dubbo, N. S. W. : NSW Agriculture & Fisheries, 1990.
- 76 p. : ill. , tabs. ; 30cm.
Soils--Testing.
Soils--Testing.