A Comparison of Alternative Crop Response Models
比较了三种简洁的玉米产量对氮磷反应的模型，通过非嵌套假设检验发现Mitscherlich-Baule模型最合适，其特点是氮磷替代有限且存在生长平台，对农业经济学家和肥料管理研究者有参考价值。
Abstract Three parsimonious models are hypothesized to represent com yield response to nitrogen and phosphorus. Each model imposes specific restrictions with regard to the elasticity of factor substitution and growth plateau. Nonnested hypothesis tests are used to evaluate the competing hypotheses. The results support the restrictions imposed by the Mitscherlich‐Baule model. For these data, corn response is characterized by limited substitution between nitrogen and phosphorus and a growth plateau. Further, the cost of using optimal input levels implied by the Mitscherlich‐Baule if it were not “true” is small relative to the other parsimonious forms and a translog approximation.