Assertion: urea | /r/HasProperty | milled before use
Facets:
value: in the field experiments
type: LOCATION
value: to have an average particle diameter
type: PURPOSE
Source sentences:
text: Before use, this urea was milled so that approximately 10 -10 particles were contained in0.l mg, the amount of urea used to seed in these experiments.
text: Before use in the field experiments it was milled so as to have an average particle diameter of to microns, and each gram contained about 10 -10 particles.