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Potassic fertilisers
Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth?
Which of the following fertilisers contains the least percentage of nitrogen?
Commercial fertilisers are available mostly in the form of
Bio-fertilisers are cheaper, renewable and pollution free. They improve the __________ of the soil.
Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by
Which of the following nitrogenous fertilisers has the highest percentage of nitrogen?