ISHS Acta Horticulturae 150: International Symposium on Substrates in Horticulture other than Soils In Situ
SOME PHYSICAL AND CHEMICAL PROPERTIES OF VOLCANIC TUFF FROM OLOT (GIRONA, SPAIN) |
| Authors: | J. Bech, N. Abelló, L. Longan, J. Andrés |
| Abstract:
We have studied several physical and chemical characteristics of the tuffs from Olot, thinking of the increasing use of volcanic "lapilli" as horticultural substrate. We have determined: particles size, bulk density, particle density, porosity, water retention curve, maximum hydric capacity, hydraulic conductivity and thermic conductivity. We have also measured: pH, electric conductimetry, cationic exchange capacity and exchange basis. Samples were obtained from four different volcanos, with a total of eleven samples, one of them a comercial one. | |
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