Sampling schemes for estimating root density distribution in cropped fields

Abstract

In discussions on root research methods, so far the choice of sampling schemes seems to have been a neglected topic. In this paper sampling schemes are discussed for various situations. It is shown that the schemes used traditionally for row crops such as cereals may give a bias of about 30 % in total root dry weight. More reliable sampling schemes are presented, as well as possibilities for correction of data from traditional sampling.