Flashcards
Class 8, Chapter 1 - Crop Production and Management | NCERT
Flashcards for quick repetition. What kind of crops are there. How to grow them properly. Science class 8 chapter 1 exercise test and solutions.
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Which of those are rabi crops?
cotton
maize
mustard
soyabean
wheat
pea
paddy
gram
Put in order steps of plant production cycle.
3
adding manures and fertilizers
Exposing inner layers of soil to air is called:
ploughing
What is tilling?
making soil surface compacted
adding moisture to the soil
leveling soil surface
removing rodents from the soil
Seed drill and funnel are used for:
fretilization of soil
ploughing
sowing
weeding
Which statements are true?
1. Manure is natural and organic substance.
2. There are only synthetic fertilizers.
3. Fertilizers are substances providing only praticular nutrients.
1. Manure is natural and organic substance.
2. Fertilizers are substances providing only praticular nutrients.
Which of those are traditional irigation methods?
Drip system
Sprinkler system
Rahat
Moat
Chain pump
Dhekli
Rahat
Moat
Chain pump
Dhekli
Crop rotation is a method used for:
manage optimal moisture level of soil
aerate soil
replenish soil nutrition
How do we call undesirable plants that grow around crops?
weeds
Which fertilization method is considered better?
Which statements are correct?
1. Manure is relatively less rich in plant nutrients.
2. Fertiliser is made in process of decomposition of plants and cattle dung.
3. Most expensive and most efficient irrigation method is a drip system.
1. Manure is relatively less rich in plant nutrients.
2. Most expensive and most efficient irrigation method is a drip system.
What is the best time to remove weeds from field?
before they produce flowers and seeds
right after they germinate
week before crops harvest
before they produce flowers and seeds
How do we call chemicals used to get rid of weeds?
weedicides
Which statements are correct?
1. Chemicals used to get rid of weeds may be harmful for person spraying them over the field.
2. Grains can be stored in granaries or siloses.
3. Kharif Crops in India are grown from June to September.
4. Damaged seeds do not float on the water.
5. Pulses and vegetables are grown during winter season.
1. Chemicals used to get rid of weeds may be harmful for person spraying them over the field.
2. Grains can be stored in granaries or siloses.
3. Kharif Crops in India are grown from June to September.
Process of separating seeds from the chaff is called:
threshing
