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Effects of time of urea application on combine-sown Calrose rice in south-east Australia. III. Fertiliser nitrogen recovery, efficiency of fertilisation and soil nitrogen supply



Effects of time of urea application on combine-sown Calrose rice in south-east Australia. III. Fertiliser nitrogen recovery, efficiency of fertilisation and soil nitrogen supply



Australian Journal of Agricultural Research 38(1): 129-138



Combine-sown rice Calrose was grown on an alkaline self-mulching grey clay soil. Prilled urea (50 kg N/ha) was broadcast at sowing, before permanent flooding, after permanent flooding or at panicle initiation. Field microplots recieved 5 atom % 15N-labelled urea at the same times. Plant recovery of 15N applied at sowing was only 3.8%, with 80% unaccounted for. Plant recovery of 15N applied after permanent flood was also relatively low (28%) with a loss of 45%.

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Accession: 001583139

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DOI: 10.1071/AR9870129



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