id	keyword
esrj-109054	eca
esrj-109054	soil
esrj-109054	conductivity
esrj-109054	low
esrj-109054	cmol
esrj-109054	mean
esrj-109054	mineral
esrj-109054	clay
esrj-109054	rock
esrj-109054	properties
esrj-109054	water
esrj-109054	content
esrj-109054	resistivity
esrj-109054	concentration
esrj-109054	cacao
esrj-109054	analysis
esrj-109054	et al
esrj-109054	field
esrj-109054	region
esrj-109054	figure
esrj-109054	quartz
esrj-109054	samples