Myers, R.J.K. (1979) Nitrogen and phosphorus nutrition of dryland grain sorghum at Katherine, Northern Territory. 4. 15-nitrogen studies on nitrogen carrier and method of application. Australian Journal of Experimental Agriculture and Animal Husbandry, 19 (99). pp. 481-487.
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Abstract
The effect of N source and method of application on grain yield and N uptake of dryland grain sorghum was studied, using 15N-labelled fertilizers. The N sources were ammonium sulphate, ammonium nitrate and urea, and the methods were banded, mixed and split application, using a rate of 50 kg N/ha throughout. The experiment was conducted over two wet seasons, 1970-1 and 1971-2. Grain yield and N uptake increased in the order banded > mixed > split application. Source of N produced yields in the order ammonium sulphate = ammonium nitrate > urea. In the drier season the order was banded urea > banded ammonium nitrate > banded ammonium sulphate. Calculation of percentage recovery in general confirmed these results. It was concluded that N fertilizer is more effective when banded, and that urea was a less effective source of N than the 2 ammonium salts. The advantages of the 15N-labelling technique are discussed
| Item Type: | Article |
|---|---|
| Author Affiliation: | Division of Tropical Crops and Pastures, CSIRO, St. Lucia, Qld., Australia |
| Subjects: | Plant Production |
| Divisions: | Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 23 May 2012 08:57 |
| Last Modified: | 23 May 2012 08:57 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/5665 |
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