Wednesday, August 15, 2012

CBSE Class 9 - Science - CH15- Improvement In Food resources

IMPROVEMENT IN FOOD RESOURCES
(WorkSheet-1)

Fill In the Blanks

1.  _______ and ________ are the main sources of nutrient supply to crops.

2.  __________ and _________ provide us with all our animal and plant food.

3. The science of growing vegetables, fruits and ornamental plants is called _________.

4. Composting done using earthworms is called _________.

5. Cereals provide us _______ (carbohydrates/proteins/fats).


6. Pulses give us _______ (carbohydrates/proteins/fats).

7. _______ and _________ are a rich source of vitamins and minerals.

8. Pests, nematodes etc. are ________ (biotic/abiotic) factors that affect crop production.

9. In order to get maximum returns, different crop combinations are grown on the same field in a pre-planned succession. This process is called _______.

10. Apis dorsata and Apis florae are varieties of ______ (Indian/Italian) bee.

11. Apis mellifera is an ______ (India/Italian) variety of honey bee used for commercial production of honey.

12. Crossing between genetically dissimilar plants is called _________.

13. Nutrients required by plants in large quantities are called ________.

14. Organic substances of animal or plant origin that is added to the soil to increase its fertility and structure are called _____.

15. The practice of growing two or more crops simultaneously on the same field is called _____.

16. Unwanted plants in the cultivated field are called ________.

17. Cattle used for farm labour is called ______.

18. Vitamin ___ and ____ (A, B, C, D , K) levels are kept high in the poultry feeds.

19. Bos indicus are the species of ________.

20. Pomphret, mackerel, tuna, sardines, and Bombay duck are examples of ________ (marine/river) fish.



21. Marine fish capture is done by fishing nets guided by _______ and ________.

22. Micro-nutrients or Food additives strengthen  _______ system of the cattle and improve  their ________ and stimulate digestion.



23. The basic advantages of inter-cropping are that it maintains soil _____ and controls _____.



24. Red Sindhi and Sahiwal are breeds of _____  _______.


24. Xanthium, Cyperinus rotundus and Parthenium plants generally grow along paddy plants. Such plants are called ____.




Answers:
1. Manure, fertilizers
2. Agriculture, Animal husbandry
3. horticulture
4. vermi-composting
5. carbohydrates
6. proteins
7. Fruits, Vegetables
8. biotic
9. crop rotation
10. Indian
11. Italian
12. Hybridisation.
13. Macronutrients
14. Manure
15. Mixed cropping
16. Weeds
17. Draught animals or Draught Cattle.
18. Vitamin A and K.
19. Indian cows
20. marine fish
21. echo-sounders, satellites
22. immune, metabolism
23. fertility, weeds
24. Indian Cows
25. weeds

2 comments: