Assertion: gypsum's amount | /r/HasProperty | depend on the amount of exchangeable na
Facets:
value: in a selected depth of soil
type: LOCATION
value: in order to obtain permanent improvement
type: PURPOSE
Source sentences:
text: Conversely, in soils where the EC effect is not enough due to the high ESP level, or in order to obtain permanent improvement, then the amount of gypsum required depends on the amount of exchangeable Na in a selected depth of soil.