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Effect of nitrogen source and time of application on wheat nitrogen uptake and grain yield

Published online by Cambridge University Press:  27 March 2009

Ali T. Ayoub
Ali T. Ayoub
Affiliation:
Hudeiba Research Station, P.O. Box 31, Ed Darner, Sudan
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Extract

Two field experiments were conducted in 1971–72 and 1972–73 on two similar sites of calcareous clay soils (vertisol) with paste pH 8·2, 0·024% and 0·22% organic carbon. Wheat (Triticum aestivum L. var. (LR N10) An3) was grown and the fertilizers ammonium sulphate, urea, nitrophoska 15% N, 15% P2O5, 6% K2O), calcium nitrate (Ca NO3)2·4H2O) and ammonium sulphate nitrate were each used at 70 kg N/ha at seeding, tillering, jointing or ear emergence and there was one treatment with no N fertilizer. The treatments were arranged in a randomized block design with four replications. Each plot was 6·0 x 7·0 m of which 4·0 x 5·0 m was harvested. N fertilizers were broadcast by hand and no basal potassium or phosphorus were added since they are known to have no effect on wheat yield on these soils. Seed a rate equivalent to 85 kg/ha was weighed separately for each plot and sown by hand in rows spaced 20 cm apart. Each experiment received 10 irrigations, each equivalent to a head of 10 cm of water, at 10-day intervals.

Type
Short Note
Information
The Journal of Agricultural Science , Volume 82 , Issue 3 , June 1974 , pp. 567 - 569
Copyright
Copyright © Cambridge University Press 1974

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References

REFERENCES

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