Interaction between Vetiver Grass Roots and Completely Decomposed Volcanic Tuff under Rainfall Infiltration Conditions

Table 3

In situ and laboratory water content of soil samples.

	Soil without roots	Soil with roots	Increase in percentage
Average in situ water content	13.33%	14.88%	11.63%
Average laboratory water content taken from sample surface	18.7%	19.8%	8.26%