Kerala SCERT Class 8 Science Chapter 3 Let’s Regain our Fields Question Answer Solution Here. Kerala Board Class 8 Students can find Here 3rd Chapter Let’s Regain our Fields Notes provide by our Teacher. Important Question Answer from Chapter 3 Let’s Regain our Fields.
- Board- Kerala Board.
- Class – 8.
- Subject – Science Part 1
- Chapter – 3.
- Chapter Name – Let’s Regain our Fields.
- Topic – Question Answer Solution.
Question: (1) about 20 different element required for the proper growth of plants they are known as ________?
Ans: – Essential element.
Question: (2) essential element one naturally available in soil through decomposition by _________?
Ans: – Microorganism.
Question: (3) ________ are substance that contain microorganism which help to increase the fertility of soil?
(a) Microbial fertilizers
(b) Chemical fertilizers
Ans: – Microbial fertilizers
Question: (4) Predators, parasites and pathogens of pests can be called _________ enemies of pests?
(a) Natural
(b) Inherent
Ans: Natural
Question: (5) Rearing silkworms for production of natural silk is called __________?
(a) Sericulture
(b) Pisciculture
Ans: – Sericulture
Question: (6) ______ is formed from the special glands of the larvae of the silk mouth?
Ans: – Silk.
Question: (7) Important prawn verities are ___________?
(a) Naran, Kara
(b) Guppy, Rohu
(c) Naran, Guppy
(d) Rohu, catla
Ans: – Naran, Kara
Question: (8) _______ is product of medicinal and nutritional value?
(a) Honey
(b) Flowers
Ans: – Honey,
Question: (9) ___________ is reared for fur?
(a) Ankara
(b) White giant
(c) Grey giant.
Ans: – Ankara.
Question: (10) climate change is another important crisis in the ________?
(a) Agricultural sector
(b) Industrial sector
Ans: – Agricultural sector.
Question: (11) In ______ plants are grown in nutrient solution?
(a) Hydroponics
(b) Aeroponics
Ans: – Hydroponics
Question: (12) in _____ plants are grown in such way that their roots in air and nutrients are sprayed on roots?
(a) Aeroponics
(b) Hydroponics
Ans: – Aeroponics.
Question: (13) Muvandan is verities of___________?
(a) Mango
(b) Plantation.
Ans: – Mango.
Question: (14) Njalipoovan is verities of ______?
(a) Plantation
(b) Mango
Ans: – Plantation
Question: (15) Vechoor is verities of _________?
(a) Cow
(b) Goat
(c) Sheep
Ans: – Cow.
Question: (16) Malabari, attappadi black is verities of ________?
(a) Goat
(b) Cow
(c) Sheep
Ans: – Goat.
Very Short
Question: (1) what is obstacles faced by farmer today?
Ans: – (i) fall of price
(ii) Crop loss
(iii) Climate change
(iv) Environmental destruction.
Question: (2) what is microbial fertilizer?
Ans: – The substance that contain microorganism which help to increase the fertilizer of soil.
Question: (3) which microorganism essential for plant growth?
Ans: – Bacteria like Rhizobium, Azotobater, Azospirillum and aquatic plants like Azolla can be used to increase nitrogen content in the soil.
Question: (4) what are natural enemy’s pets?
Ans: – Predators, parasites and pathogens of pests is called natural enemies of pets.
Question: (5) define sericulture?
Ans: – Rearing silkworms for the production natural silk is called sericulture.
Question: (6) name some verities of silkworms?
Ans: – Mulberry silkworm, Tussar silkworm, muga silkworm etc are the major verities.
Question: (7) name the verities of fish reared for food?
Ans: – Pearl spot, Rohu, catla are reared for food.
Question: (8) name verities of fish reared for ornamental?
Ans: – Gold fish, guppy etc reared for ornamental purpose.
Question: (9) name rearing birds for egg and meat?
Ans: – White leghorn, Athulya, Gramalekshmi.
Question: (10) name the verities of honey bees?
Ans: – Kolan, Mellifera, Niodiyan, etc.
SHORT NOTE :
Question: (1) how can we grow plants without soil?
Ans: – There are the two method .In hydroponic plants are growth in nutrient solution. In Aeroponics are plants are grown in such way that roots grown in air and nutrients are sprayed on roots.
Question: (2) what is precision farming?
Ans:- In these method of farming , the nature of soil, quality of elements in the soil , Ph value of soil presence of water etc in the crop field are tested using modern technology and appropriated crops are selected to cultivation.
Question: (3) what is polyhouse farming?
Ans: – Polyhouse is special type of arrangement in which a crop field is completely or partially covered by transparent polythene sheets.
Question: (4) describe medicinal plant cultivation?
Ans: – Basil, Aloe, Neem, Adathodo, sida, Vettivera, Aegle marmelos, plumbago etc can be grown in crop field. Ayurveda is completely depend on medicinal plants.
Question: (5) what is integrated pest management – 1 pm?
Ans: – The basic principle of integrated pest management is not the destruction of pests totally. Instead it tries to prevent the multiplication of pests and to limits their number without loss of crops.
Question: (6) Explain how microbes that provide fertilizer?
Ans: – Microbial fertilizers are substance that contain microorganism which help to increase the fertilizer of soil. Some Bactria like Rhizobium and aquatic plants like Azolla can be used to increase nitrogen content in the soil.
chapter no. 3 Lets Regain Our Fields