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?
pea
soyabean
wheat
cotton
paddy
gram
mustard
maize
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?
leveling soil surface
removing rodents from the soil
adding moisture to the soil
making soil surface compacted
Seed drill and funnel are used for:
sowing
weeding
fretilization of soil
ploughing
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
Moat
Dhekli
Rahat
Chain pump
Moat
Dhekli
Rahat
Chain pump
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
week before crops harvest
right after they germinate
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
