Estimate water needs for your lawn by observing the water loss from a free-water surface like the evaporation pans used by climatologists, or a wide-mouthed bucket.
(Estimate water; needs; for your lawn) (the evaporation pans; used; by climatologists, or a wide-mouthed bucket)
Estimate water the evaporation pans
needs used
for your lawn
by climatologists, or a wide-mouthed bucket