For cassava growing in Klonghad district,
which received rainmaking services, the rainfall and
the root type used had statistically significant effects
on cassava yield at the .05 and .01 level, respectively.
In Ta Phraya district, which did not receive
rainmaking services, the rainfall and chemical
pesticide and herbicide had statistically significant
effects on cassava yield at the .01 and .1 level,
respectively