Question

Define and explain

manure fertilizer, biofertilizer, mycorrhiza, diazotrophs, root nodule, Frankia, nitrogen fixation
.......... Organic substances obtained by the decomposition of animal wastes and plant residues which supply essential elements and humus to the soil.

Answer 1

Fertilizer - It is an organic or inorganic compound rich in plant nutrients

Biofertilizer- These are living microorganisms which fix nitrogen bacteria in roots of the plants.

Diazotrophs- These as bacteria that fix atmospheric nitrogen gas into a more usable form.

Mycorrhiza - It is a symbiotic relationship between fungal hyphae and roots of higher plants

Root nodule- These are associated with symbiotic nitrogen fixation which occurs at roots.

Frankia-It is the genus of nitrogen-fixing bacteria which lives in symbiotic form.

Nitrogen-fixation- It is a process in which the atmospheric nitrogen is converted into ammonia.

'Manure is an organic substance obtained by the decomposition of animal wastes and plant residues which supply essential elements and humus to the soil'.