fertiliser, lightning, nitrate in soil, protein in dead animals and waste, eaten by decomposers, turned into animal protein when eaten, protein in dead plants, protein turned into nitrates by decay, nitrates added by farmers, nitrates absorbed (taken up) by plants, nitrates formed when N and O react, plant proteins, bacteria and fungi (decomposers), proteins in dead material, animal proteins.

Edetabel

Visuaalne stiil

Valikud

Vaheta malli

Kas taastada automaatselt salvestatud ?