Agronomy - Study Mode

[#361] One of the principles of conservation agriculture is
Correct Answer

(C) Minimum 30% of the land must be covered with crop residue

Explanation

Solution: Conservation agriculture is based on three main principles: i. Minimum mechanical soil disturbance. (i.e. no tillage) ii. Permanent soil organic cover minimum of 30% with crop residues or cover crops. iii. Species diversification.

[#362] Kent, Coachman and Fleming Gold are the varieties belong to
Correct Answer

(B) Oat

Explanation

Solution: Oats are Mediterranean origin crops belonging to the family Poaceae. The scientific name of oats is Avena sativa. There is more than 70 variety of oats available but only a few are being cultivated and Kent, Coachman and Fleming gold are varieties of oats. Kent was released in 1975 and is introduced in the USA and is resistant to rust and blight.

[#363] The Respiratory uncouplers
Correct Answer

(D) All of the above

Explanation

Solution: An uncoupler or uncoupling agent is a molecule that disrupts oxidative phosphorylation in prokaryotes and mitochondria or photophosphorylation in chloroplasts by dissociating the reactions of ATP synthesis from the electron transport chain. Uncouplers are capable of transporting protons through mitochondria and lipid membranes. It also disrupts the electrochemical potential gradient.

[#364] Biologically Fixed Nitrogen measured by
Correct Answer

(A) Acetylene Reduction Assay

Explanation

Solution: Nitrogen fixation is one of the important characteristics of legumes, they are capable of fixing atmospheric nitrogen in symbiotic association with Rhizobium bacteria. There are several methods available to quantify nitrogen fixation and the most common method is the Acetylene Reduction assay.

[#365] For which type of fertilizer, India is fully dependent on imports
Correct Answer

(C) K-fertilizer

Explanation

Solution: India is entirely dependent on imports to meet the Potash demand (K-fertilizers) . India's dependency on imports at present is approx. 25% for urea, (0% in case of Phosphates and 100% in case of Potash.
All the potassium based fertilizer required by the farmers of our country is imported. India imports nearly 3.5 million tonnes of potash every year from Canada, Israel and Jordan.