Abstract:Three sequential surveys of exchangeable potassium (Exch. K) in the surface 10 cm of major Tasmanian soils are presented, together with data from surface samples of profiles collected earlier. Soils with Exch. K less than 0.4 m.equiv 100 g-1 are considered to be low or marginal in potassium readily available for pasture growth. Lateritic podzolic soils were lowest in Exch. K, with four-fifths of the sample sites below 0.4 m.equiv 100 g-1 (median value 0.21 m.equiv 100 g-1). Podzols and humus podzols were simil… Show more
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