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Efficient use of nitrogenous fertilizers by wheat as determined by the application of N-15 and P-32 labelled fertilizers at different growth stages


, : Efficient use of nitrogenous fertilizers by wheat as determined by the application of N-15 and P-32 labelled fertilizers at different growth stages. FAO: Proceedings of the third FAO/Rockefeller Foundation Wheat Seminar, held at Ankara, Turkey, 29 April 13 May 1970: 272-285

In a trial at Tarsus, S. Turkey, the dwarf wheat Penjamo 62 was given 80 kg P2O5/ha as 32P-labelled superphosphate and 120 kg N/ha as 15N-labelled NaNO3 or ammonium sulphate. The N was applied in 1, 2 or 3 dressings at sowing, tillering or the boot stage. Plant contents and uptake of N and P at various growth stages are given. The highest grain yield response to N was given by 2 equal split dressings at sowing and tillering.

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