Ammonium Nitrate NH4NO3 Pure £3.39 | Aqua Plants Care
Nitrate is a mobile element (can transfer from one part of the plant to another), therefore symptoms of its deficiency occur in older leaves first. Plants absorb nitrate in the form of ions NO3-, NO2-, NH4+ and urea. Water plants absorb nitrate first of all in the form of ammonium cation, as its absorption requires the least energy.