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Isotopic studies on the uptake of sulphur by pasture plants. 2. Uptake from various soil depths at several field sites

, : Isotopic studies on the uptake of sulphur by pasture plants. 2. Uptake from various soil depths at several field sites. New Zealand Journal of Agricultural Research 20(2): 229-233

In a perennial ryegrass/white clover pasture on (a) Kowai sandy loam and (b) Gorge silt loam in Canterbury, New Zealand, 35S was placed at 4 soil depths of 7.5-52.5 cm in spring 1972 or 22-100 cm in autumn 1973, and its uptake and that of associated soil 32S investigated. In 1972, pastures utilized S from all soil depths. Approx. 50% of 32S uptake was from the 7.5-cm level. Uptake of 32S from the upper 2 soil layers totalled 76 and 90% in (a) and (b), resp.


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