Implications of soil type, pasture composition and mineral content of pasture components for the incidence of grass tetany in the south east of South Australia
1991
Lewis, D.C. (South Australian Dept. of Agriculture, Naracoorte) | Sparrow, L.A. (Tasmanian Dept. of Primary Industry, Kings Meadows (Australia))
Of 22 sites investigated, grass tetany deaths had occurred on 9 within the previous 5 years; all of these were classified as solodised solonetz soils. Deaths were reported in late autumn and winter, with grasses dominant in July. From analysis of pasture components and soils it was shown that the K to (Ca plus Mg) ratio (R) in the soil may be used as an indicator of grass tentany hazard, and a critical value of 0.07-0.08 is postulated. In July the mean herbage R value for both annual and perennial grass species grown on the solodised solonetz soils exceeded 2.2 but was below 2 for the other 2 soil types examined.
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