Spatial soil sampling is an integral part of a survey aimed at describing spatial variability in properties. We propose considering the procedure as task optimal design. In practical terms, experiments can reduce experimentation costs, they allow researcher to obtain one set points. present design, based on fundamental idea selecting sample locations with most significant dissimilarities. The p...

Question: How can vegetation gradients be described in riparian zones located in a species-rich mountain range and how do these gradients explain the variation found in the vegetation? Location: Hottentots Holland Mountains, Western Cape, South Africa. Methods: Three gradients (geographic, longitudinal, lateral) were defined to describe the complex vegetation patterns found here. The gradients ...