Author : Sureeporn Khemmook

Summary : Results showed that mixed fruit orchard had the highest SMC at all levels of soil depth while oil palm plantation had the lowest SMC. Water table under mixed fruit orchard was found the highest and para rubber plantation had been the lowest. In dry seasons, the linear relationship between SMC and WT was found by which the R2 of mixed fruit orchard, oil palm plantation were 0.98, 0.87 and 0.80 respectively. In wet season, the relationship was however insignificant. And in dry seasons, the highest value of relationship between total rainfall 5 days before data collection and WT. The R2 of mixed fruit orchard, oil palm plantation and para rubber plantation were 0.98, 0.95 and 0.94 respectively. The relationship of SMC and WT in dry season was highly significant in period lowest SMC and water table. Ground cover such as legume (Pueraria phaseoloides) and short grass should be used to protect water in soil and water table to decrease gradually in dry season.