Many papers have been published that attest to the release of plant nutrients from minerals and rock dusts by organic acids released from decomposing organic matter ( humic acids) and from soil micro organisms.
(organic acids; released; from decomposing organic matter ( humic acids) and from soil micro organisms) (Many papers; have been published; )
organic acids Many papers
released have been published
from decomposing organic matter ( humic acids) and from soil micro organisms