Agronomy - Study Mode

[#346] Which one of the following is not a fish?
Correct Answer

(A) Silver fish

Explanation

Solution: Out of the given options, Silverfish is not a fish it is an insect. It is a species of small, primitive, wingless insect in the order Zygentoma. It is silvery or light grey, combined with a fish-like appearance in its movements.

[#347] 2, 4D sensitive variety of Wheat
Correct Answer

(A) HD 2009

Explanation

Solution: HD-2009 is a high-yielding double dwarf variety, highly resistant to rust. It is sensitive to 2, 4D. whereas 2, 4D is an herbicide that kills plants also it is a plant growth regulator.

[#348] Anaerobic condition in rice field is responsible for gaseous loss of nitrogen by
Correct Answer

(A) Denitrification

Explanation

Solution: Anaerobic condition in the rice field is responsible for gaseous loss of nitrogen by Denitrification . It is the microbial process of reducing nitrate and nitrite to gaseous forms of nitrogen, principally nitrous oxide and nitrogen. Nitrogen loss by anaerobic oxidation of ammonium in the rice rhizosphere.

[#349] Consider the following crops 1. Bajra 2. Cotton 3. Maize 4. Rice Which one of the following is the correct sequence of the above crops according to the period of the development of first hybrid verities in India?
Correct Answer

(C) 3, 1, 2, 4

Explanation

Solution: Maize is the first hybrid crop variety developed in India, followed by Bajra, Cotton and Rice. The first hybrid variety of maize, Ganga-1, was developed in 1961. The first hybrid variety of Bajra was released in 1965, developed by Punjab Agricultural University, Ludhiana, and was called HB1. H4 was the first hybrid variety of cotton released in 1970, developed by Cotton Research Station Surat. Krh-1 was the nation’s first hybrid variety of rice with the aroma of basmati rice.

[#350] Seed rate of hybrid maize is
Correct Answer

(B) 20 - 25 kg/hectare

Explanation

Solution: The seed rate of hybrid maize is about 20 - 25 kg/hectare. For good yield, the selection of quality seeds is very important along with all the favourable parameters provided. The hybrid seed varieties like CO1, CO6, TNAU, etc., give a good yield.