Soil Science and Fertilizers

Ammonia is a colourless gas with a characteristic pungent odour. Ammonia contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to food and fertilizers. Ammonia, either directly or indirectly, is also a building block for the synthesis of many pharmaceuticals.

Ammonia is a compound of nitrogen and hydrogen . It is a colourless gas with a characteristic pungent odour. Ammonia contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to food and fertilizers.

Yes, it is correct. Water fills up all the spaces occupied by the air in the soil. In this situation, animals living in the soil have to come out for respiration.

Yes, soil has air, which when replaced by water, comes out in the form of bubbles.

  Urea is nitrogenous fertilisers which is not very effective in acidic soils.

Bio-fertilizers are naturally occurring organic substances derived from biological materials that enhance soil fertility. They contain living microorganisms or organic matter that enriches soil nutrients, unlike chemical fertilizers.

They can be easily stored if kept away from moisture.

Both the options are incorrect.

Brake fern was discovered to have the ability to hyperaccumulate (absorb large amounts of) arsenic from soil. The fern was growing at a central Florida site contaminated with large amounts of copper arsenate in the soil. The discovery may lead to the use of this fern as a potential bioremediation plant.

Cotton requires well-aerated, loamy soil that allows good drainage and prevents waterlogging. Loamy soil provides the right balance of sand, silt, and clay. Cotton cannot grow in waterlogged clayey soil and needs proper aeration for root development.

Biofertilisers are organisms which increase the nutrient availability in crop plants directly or through soil enrichment.

Earthworm is used in vermicompost method of preparation of organic manure.

P is insoluble in strongly acidic or basic soils. Phosphorus can react strongly with Fe and Al components of acid tropical soils, thereby becoming unavailable for plant uptake

Urea (CO(NH2)2) is a nitrogenous fertilizer containing approximately 46% nitrogen by weight, making it one of the highest nitrogen content fertilizers available. It provides nitrogen in an organic form that plants can convert to usable nitrates. Sodium, phosphatic, and potassium fertilizers provide different nutrients.

Pimpri, near Pune in Maharashtra, is a major pharmaceutical industrial hub known for antibiotic production. Hindustan Antibiotics Limited (HAIL), India's first public sector drug manufacturing company, was established there in 1954. The city hosts numerous pharmaceutical companies specializing in antibiotics and other medicines.