J. STANDLEY

Queensland Department of Primary Industries, P.O. Box 201, Biloela, Qld. 4715

Abstract

In a survey of the nutrient status of Stylosanthes guianensis cv. Schofield in north Queensland pastures, samples of soil and stylo tips from 34 sites were analysed for phosphorus and potassium.
Soil tests rated 25 sites (74%) as deficient in phosphorus and 18 sites (55%) as deficient in potassium whereas plant anaylses rated 19 sites (53%) as deficient in phosphorus and 2 sites (6%) as deficient in potassium. Soil and plant tests gave the same rating at 22 sites (65%) for phosphorus and at 17 sites (51%) for potassium.
The combined use of soil and plant analyses and possible reasons for discrepancies between them are discussed.