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- W2024684269 abstract "SUMMARY The fate of 35 S-labelled sheep urine sulphate in the soil and its plant uptake were measured in field experiments over a 12 month period in 1990/91 in Canterbury, New Zealand. Urine was applied in either summer or winter. After the summer application, there was a marked increase in pasture growth and S uptake which lasted for a period of c. 90 days. Plant uptake of applied 35 S was very rapid and c. 11% was recovered in the pasture herbage within 65 days of application. By the end of the experiment, c. 80% had been recovered in the herbage. A portion of applied 35 S was incorporated into soil organic forms mainly as C-bonded S. After 86 days, 30% of the applied 35S was in the C-bonded form but during the rest of the experiment this declined to 17% as the 35 S was remineralized and absorbed by the growing pasture plants. Following the winter urine application, the increase in pasture dry matter production and 32 S uptake was much less marked than that for the summer application. Twenty five percent of the applied 35 S was recovered in pasture herbage within 65 days and this increased to 70% by the end of the experiment. Some of the applied S was incorporated into soil organic forms and, by 83 days, 20% of the applied 35 S was present in C-bonded form. Through mineralization this declined to 7% by the end of the experiment. Over the initial 41 days of the experiment, c. 25% of the 35 S was lost due to leaching." @default.
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- W2024684269 date "1993-08-01" @default.
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- W2024684269 title "Fate of 35S-labelled urine sulphate in urine affected areas of pasture soil under field conditions" @default.
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- W2024684269 doi "https://doi.org/10.1017/s0021859600076826" @default.
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