Crop Production and Management

Samacheer Book Back Questions And Answers For Science Standard 8 “Crop Production and Management“

I. Choose the best answer:
1. The process of placing seeds in the soil is called as
a. ploughing
b. sowing
c. crop production
d. crop rotation

2. Organism that control insects and pests of plant crops is
a. bio-pesticides
b. bio-fertilizers
c. earthworms
d. neem leaves

3. The method in which water flows over the soil surface and allow it to infiltrate is
a. irrigation
b. surface irrigation
c. springler irrigation
d. drip irrigation

4. Effective microorganism preparation is not used in
a. seed treatment
b. foliar spray
c. soil treatment
d. bio-predators

5. Which of the following is not present in Panchagavya?
a. Cow dung
b. Cow’s urine
c. Curd
d. Sugar

II. Fill in the blanks:
1. The process of actively growing seedling from one place and planting in the main field for further growth is called _____.
2. _____ is a plant growing in a place where it is not wanted.
3. The chemicals used for killing the weeds or inhibiting their growth are called as _____.
4. _____ transfer their unique characteristics to the descents.
5. _____ centers serve as the ultimate link between ICAR and farmers.
6. Several popular high yielding varieties of major crops have been developed by _____.

Answers:
1. Transplantation
2. Weed
3. herbicides
4. Heirloom seeds
5. Krishi Vigyan Kendra
6. IARI (Indian Agricultural Research Institute

III. Match the following:
1. Bio-pesticide       A. Neem Leaves
2. Bio-predators      B. Bacillus thuringiensis
3. Bio-fertilizer        C. Control white flies
4. Bio-indicators      D. Improve soil fertility
5. Bio-repellants      E. Quality of environment

Answers:
1. B
2. C
3. D
4. E
5. A

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