A nutrient survey of legume evaluation sites on red earths, solodic soils and black earths in central Queensland [Stylosanthes hamata]
1990
Standley, J. | Bruce, R.C. | Webb, A.A. (Queensland Dept. of Primary Industries (Australia). Agricultural Chemistry Branch)
Soil fertility was assessed over a wide range of sites using Stylosanthes hamata cv. Verano in glasshouse experiments. Yield increases by stylo in a P rates experiment occurred on all but one soil. Principal responses to other elements in a screening experiment were to S on 7 soils and to Mo on 5, with minor responses to K on 2 and Zn on one. No responses were found to lime in an experiment where basal nutrients had been applied. There was no obvious pattern of deficiencies to distinguish the soil groups or geographical areas. Thus, single superphosphate with Mo should generally overcome nutrient deficiencies for pasture legume establishment throughout the region. Implications of surface sealing and hardsetting with some soils, of the accumulation of sulphate at depth and of P sorption characteristics are discussed.
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