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Effects of different soil-water-fertilizer management practices on tagged fertilizer N uptake by rice in Amazon varzea and Sacramento clay



Effects of different soil-water-fertilizer management practices on tagged fertilizer N uptake by rice in Amazon varzea and Sacramento clay



Journal of Agricultural Research of China 35(3): 387-400



In 2 pot trials in California, USA and 2 in Brazil, rice was grown in Sacramento clay from California and Amazon varzea soil from Brazil and was sown with or without puddling, with various periods of drainage after sowing, banded or broadcast application of fertilizer and various rates of applied N up to 400 mg/kg soil and 15N-labelled ammonium sulphate fertilizer was used to trace uptake. Recovery of N at flowering was 60-67% in the Amazon varzea soil and 25-59% in the Sacramento clay.

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Accession: 001580513

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