A Nonparametric Approach to the von Liebig‐Paris Technology
发展了冯·李比希-巴黎养分响应技术的对偶含义及参数与非参数检验，用乐观和悲观两种非参数近似分析实验与蒙特卡洛数据，发现产量平台存在，但投入不可替代性证据不一。
Abstract We develop the dual implications of the von Liebig‐Paris nutrient‐response technology and parametric and nonparametric tests for this technology. We discuss the nonparametric approach using two different representations corresponding to optimistic and pessimistic nonparametric approximations of the technology. Application of the nonparametric approach to two experimental data sets and to two data sets generated by Monte Carlo methods confirms the presence of yield plateaus, but provides mixed evidence regarding input nonsubstitution. The optimistic representation exhibits virtually no input substitution, while the pessimistic representation shows considerable substitutability.