Assertion: urea's effect | /r/HasProperty | occurred under non-urea treatment
Facets:
Source sentences:
text: While simply wetting of the soil, as occurred under the non-urea treatment, induced N 2 O fluxes at −1 kPa, this wetting effect was not sufficient to generate the high N 2 O fluxes observed under urea from days 0 to 4.