0 a chemical that includes nitrogen and oxygen, often used as a fertilizer (= a substance that helps plants grow) -- 硝酸盐；硝酸盐肥料
The implications of restricting use of fertilizer nitrogen for the productivity of arable crops, their profitability and potential pollution by nitrate.
It is doubtful, given the above chemistry, that any significant amount of nitrate formed in these solutions over the 4 d of testing.
There may be ecological arguments that light and nitrate are the signals that initiate the germination process of perceptive (non-dormant) seeds.
Wetlands may also act as pollution assimilation agents for nitrate pollution created by up-stream agriculture.
Microbial immobilization of ammonium and nitrate in relation to ammonification and nitrification rates in organic and conventional cropping systems.
Periodic testing showed no detectable nitrite concentrations, thus the results are reported as nitrate alone.
Continents rising above sea level constitute the major renewable source of nutrients (nitrate, phosphate) essential to maintaining life.
When necessary, the amplification products were further analysed on 6 % polyacrylamide gel stained with 0.1 % silver nitrate.
