State whether the statements are true or false :-
i)Biofertilizers are organisms that enrich the nutrient quality of the soil.
ii) The main sources of biofertilizers are bacteria only.
iii) Cyanobacteria serves as an important bio fertilizer in paddy fields.

i-T ii-F iii-T

i) True: Biofertilizers are organisms that enrich the nutrient quality of the soil by fixing atmospheric nitrogen, solubilizing phosphorus, or promoting nutrient availability through various biological processes.

ii) False: While bacteria are one of the main sources of biofertilizers, other organisms such as fungi and cyanobacteria can also serve as biofertilizers.

iii) True: Cyanobacteria, specifically species like Anabaena and Nostoc, can serve as important biofertilizers in paddy fields. They have the ability to fix atmospheric nitrogen and contribute to the nitrogen requirements of rice plants.