BULK DENSITY. Soil bulk density is defined as the weight of a unit volume of dry soil, including the solid and the pore volumes1. Thus it is easy to see that compaction of soils will directly influence their bulk density. Bulk density is closely related to, and in fact governs, several soil characteristics such as soil strength, infiltration rate and macropore space. All of these soil characteristics have horticultural impacts. Total pore space in a soil is inversely related to bulk density as shown below: TotalPoreSpace(%) = 100 β (
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