Excess nitrate is water soluble and easily washed through soil by rain or irrigation water, making nitrate contamination a widespread problem where nitrogen fertilizers are used with any frequency.
(Excess nitrate; is; water soluble and easily washed through soil by rain or irrigation water) (nitrogen fertilizers; are used; L:a widespread problem)
Excess nitrate nitrogen fertilizers
is are used
water soluble and easily washed through soil by rain or irrigation water
L:a widespread problem