Implementation of a sigmoid depth function to describe change of soil pH with depth

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• 作者：Yakun Zhang^a ; Asim Biswas^a ; ^b ; ^{biswas@uoguelph.ca} ; Viacheslav I. Adamchuk^c
• 关键词：3D ; three dimension ; EDF ; exponential decay functions ; EAQSF ; equal-area quadratic spline functions ; SOC ; soil organic carbon ; SOM ; soil organic matter ; EC ; electrical conductivity ; RMSE ; root mean squared error
• 刊名：Geoderma
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：289
• 期：Complete
• 页码：1-10
• 全文大小：1000 K
• 卷排序：289

文摘

We propose a new model to quantify soil pH distribution at depths in agricultural fields. Very simple model and easy to implement with small number of parameters It is based on the pedological and management characteristics of soil profile. Tested with a local (32) and global (432) soil profile dataset Compared with commonly used regression and spline based models