Polish Journal of Environmental Studies > 2007 > 16 > 4 > 495-503
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journal ISSN : | 1230-1485 |
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Bibliography
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1. AKRAM M., MIAN S. M., AHMAD Z., GILL K. H. Use of fertilizer phosphorus at sufficiency level to sustain soil fertility without environmental repercussions. Pak. J. Soil Sci. 18, 19, 2000.
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2. KASTENS, T. L., SCHMIDT, J. P. AND DHUYVETTER, K. C. Yield models implied by traditional fertilizer recommendations and a framework for including nontraditional information. Soil Sci. Soc. Amer. J. 67, 351, 2003.
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3. LARRY G.B., ANDRASKI T.W. Diagnostic tests for site- specific N recommendation for winter wheat. Agron. J. 96, 608, 2004.