Abstract

Monte Carlo simulation has proven useful to understand container media properties. Although use of container media in horticulture is widespread, their physical properties are often misunderstood. Container media usually have larger external pores than natural soils, and the components from which they are formulated may have internal porosity that often accounts for half the total porosity. Traditional laboratory methods have provided limited insight into container media phenomena because of the difficulty in distinguishing between internal and external pores. By means of computer simulation we have characterized external porosity and pore size of container media. We have also been able to study volume shrinkage upon mixing components with different particle sizes. Pore size can be correlated with water retention characteristics, and size of external pores is related to the sizes of the particles that are mixed. With Monte Carlo simulation one can mix different particle sizes in different proportions, thus determining the relationships between pores and particle sizes.

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