Question

Several south indian states raise 2-3 crops of rice annually. The agronomic feature that makes this possible because of
A) shorter rice plant
B) better irrigation facilities
C) early yielding rice varieties
D) disease resistant rice variety

Answer 1

Hint: To raise a field of crops for 2-3 times annually we need to grow a very improved variety of the crop which enables us to grow a good yield in no time. This can be achieved by plant breeding methods.

Complete answer:
Early yielding rice variety enables several south Indian states to raise 2-3 crops of rice annually. This is very obvious that if a state is able to raise 2-3 crops annually it will naturally lead to early harvest of the crop and therefore the field will be ready to give round of the yield. The agronomic feature that makes this possible is because of the early yielding variety of rice crop. The science of altering the genetic pattern of plants in order to increase their value and utility for human welfare is called plant breeding.

Important steps in plant breeding includes:
-Collection of Variability
-Evaluation and Selection of Parents
-Hybridization
-Selection and Testing of Superior Recombinants
-Testing Release and Commercialization of New Cultivars

Improvement in genotype is mainly done by improving the genetic potentialities in plants. The scientists who are concerned with the improvement of plants are called plant breeders and the science of improvement of crop varieties is called plant breeding.

During the 1970s, India witnessed a rapid increase in the production of agricultural products (particularly wheat, rice) through the introduction of high and early yielding varieties, increased irrigation facilities, application of fertilizers and pesticides, multiple cropping and better agricultural management. Since agriculture is mostly concerned by crop plants and the plants are mostly green in colour, the enormous agricultural production has been called green revolution.

Note: All these efforts were done by Prof. M.S.Swaminathan who is also called father of green revolution in India. Green revolution was a period when Indian agriculture was converted into an industrial system due to the adoption of modern methods and technology such as the use of high yielding variety (HYV) seeds, tractors, irrigation facilities, pesticides, and fertilizers.