Pedosphere 9(4): 351--356, 1999
ISSN 1002-0160/CN 32-1315/P
©1999 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Comparison of mathematical models for describing crop responses to N fertilizer |
| YAN Shao-Hua1, GUO Jun-Yao2 and ZHANG Zhen-Hua1 |
1 Institute of Soil and Fertilizer, Jiangsu Academy of Agricultural Sciences, Nanjing 210014 (China)
2 Collega of Natural Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095(china) |
| ABSTRACT |
| Four mathematical models were systematically evaluated in describing responses of four different crops at 7 rates of nitrogen application. Residual sum of squares and a total point ranking method were used to assess the model fitting for crop responses to nitrogen application. Sparrow's inverse quadratic polynomial model performed the best. |
| Key Words: crop responset mathematical model, N fertilizer |
| Citation: Yan, S. H., Guo, J. Y. and Zhang, Z. H. 1999. Comparison of mathematical models for describing crop responses to N fertilizer. Pedosphere. 9(4): 351-356. |
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