IX B SAI: IMPROVEMENT IN FOOD RESOURCES 2

Q1.     (a)List three factors on which cultivation practices and crop yield depends.

Ans: Biotic and abiotic resistance, change in maturity duration, wider adaptability.

(b) Name three stages involved in farming practices.  

Ans: Crop variety improvement, crop production improvement, crop protection management.         

Q2.  Define ‘Hybridisation’. Explain the three types of cross-breeding practiced during hybridisation?
Ans: Hybridisation is way of crossing between genetically dissimilar plants. 

a. Intervarietal Hybridization: way of crossing among different varieties

b. Interspecific Hybridization:  way of crossing between different species

c. Intergeneric Hybridization: way of crossing between different genera

Q3.     (i) What is meant by genetically modified crops? 

Ans: Genetically Modified Crops (GMC): Another way of improving the crop is by introducing a gene that would provide the desired characteristic.

(ii) What are the desired agronomic characters for fodder and cereal crops? 

(ii) Fodder – profuse branching, cereal – dwarfness 

(iii) In your opinion what should be done so that the modern agriculture technology

is adopted by most of the farmers ? 

Ans: By encouraging scientific temper, awareness and ensuring adequate insurance against failure of crop, buy-back arrangement, scientific support by agricultural scientists and live TV channel to update farmers about latest happenings.

Q4.     What is hormonal stimulation in fish and how is it done in fish? 

Ans: Hormonal stimulation of fishes is done to mature sex cells artificially. Hormones and methods used for stimulation slightly vary for different species of fishes. Hormone that could be used for stimulation is FSH (Follicle Stimulating Hormone) or Luteinizing hormone (LH) that trigger ovulation.

Q5.     What do you mean by the term sustainable development?

Sustainable development means to meet the needs of present generation, without endangering the availability of resources for future generation, to keep balance between development and environment.

Q6.     Define ‘Rain water Harvesting’ and ‘Water shed management’ and state one advantage of each.

Ans: Rainwater harvesting: It is a technique used for collecting, storing and using rainwater which otherwise flows into drains and damages roads. The rainwater is collected from various hard surfaces such as roof tops and/or other man made aboveground hard surfaces. 

It not only raise water table but also prevents logging of water which eventually turns into mosquito breeding havens.

Watershed management:  The management of water resources in a certain area. It is done to increase the utility of rainwater by building small check-dams. The check-dams stop the rainwater from flowing away

It prevents erosion of soil, raise water table thus reduces cost of energy for pumping water back to the desired field.