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Estimation of pore space and the calculation of air volume in horticultural substrates


, : Estimation of pore space and the calculation of air volume in horticultural substrates. Acta Horticulturae ( 294): 29-39

A simple method using a 200 ml moist, unground sample of substrate to displace paraffin from a simple 500 ml pycnometer is described for calculating the effective pore space (EPS) in substrates with a significant proportion of closed pores. The method is especially useful for substrates containing polystyrene, perlite, pumice, tuff and expanded clay, which require the true determination of particle size (PD).

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