Studies on the Physical Properties of Horticultural Soils : I. Characteristics of the Pore Structure and Water Retentivity of Kanuma-tsuchi

摘要

The retentivity and the pore-size distribution were investigated on the Kanuma-tsuchi as a horticultural soil used often by gardeners for the plants requiring the contradictory good drainage ability and gaseous conductivity. From the results of pore-size distribution of the sieved classes of particles, the total pore volume was larger in particles more than 2mm of size than in smaller particles. And major pore was distributed between 1 and 7 μm which were very useful for the water retentivity. The results for retentivity were also same. From the comparison between the consolidated sample and non-loaded, not only the pore in inter-aggregated but the fine pores in aggregates were also decreased by the force.