CBSE Class 9 Science Chapter 15
Improvement in Food Resources
Improvement in Food Resources
Food is one of the basic needs for all living organisms. Food provides
nutrients like carbohydrates, fats, protein, vitamins and minerals.
All living organisms need food because:
It provides carbohydrates, fats vitamins and minerals
It allows development of the organisms
It is needed to gain energy for everyday tasks
Main sources of food:
Plants – obtained from agriculture
Animals – obtained from animal husbandry
The efficiency of crops and livestock is required in India because:
The population of India is growing at a faster rate hence more amount of food is
required to meet the rising demand.
The agricultural land is limited as compared to the growing population.
Sources of food: Agriculture & animal husbandry (livestock).
Problem: India is an agriculture oriented country but still lack of food
due to growing population.
Solution:
1. Increase efficiency of production.
2. Access of food to people who live in food deserts (urban
neighbourhoods and rural towns).
3. People should have enough money to buy food.
Green Revolution
Green Revolution is a programme introduced in many poor countries
to increase food production by use of modern technology, proper
irrigation, improved seeds, etc.
,White Revolution
White Revolution is a programme introduced in India to increase
production of milk in India. This programme made India self –
sufficient m production of milk.
Similarly Blue Revolution was introduced to enhance fish production
and Yellow Revolution was introduced to increase oil production.
Types of Crops
Cereals (wheat, Rice, Maize, Millet, Sorghum) provide us
carbohydrates.
, Pulse (gram, pea, black gram, green gram, pigeon pea, lentil) provide
us proteins.
Oil Seeds (soya bean, ground nut sesame, castor, mustard, linseed,
sunflower) provide us fats.
Vegetables, spices, fruits provide us vitamins & minerals.
Fodder crop (berseem, oats, sudan grass are raised as food for the
livestock are called as fodder crops.
Crop Season
Different crops require different conditions (temp, moisture, etc.),
different Photo - periods (duration of sunlight) for their growth and
completing life cycle.
There are following two distinct season crops:
Kharif Season:
June to October (Rainy season).
Monsoon requires more water.
Paddy, soyabean, pigeon pea, maize, black gram, green gram
and rice are kharif season crops.
Rabi Season:
Nov. to April.
Requires less water.
Wheat, gram, peas, mustard and linseed are rabi season crops.
Improvement in Crop Yield
Yield increases when production increases from same amount of land
in same period of time.
Approaches which enhance the crop yield are as following:
1. Crop Variety Improvement
2. Crop Production Improvement
Improvement in Food Resources
Improvement in Food Resources
Food is one of the basic needs for all living organisms. Food provides
nutrients like carbohydrates, fats, protein, vitamins and minerals.
All living organisms need food because:
It provides carbohydrates, fats vitamins and minerals
It allows development of the organisms
It is needed to gain energy for everyday tasks
Main sources of food:
Plants – obtained from agriculture
Animals – obtained from animal husbandry
The efficiency of crops and livestock is required in India because:
The population of India is growing at a faster rate hence more amount of food is
required to meet the rising demand.
The agricultural land is limited as compared to the growing population.
Sources of food: Agriculture & animal husbandry (livestock).
Problem: India is an agriculture oriented country but still lack of food
due to growing population.
Solution:
1. Increase efficiency of production.
2. Access of food to people who live in food deserts (urban
neighbourhoods and rural towns).
3. People should have enough money to buy food.
Green Revolution
Green Revolution is a programme introduced in many poor countries
to increase food production by use of modern technology, proper
irrigation, improved seeds, etc.
,White Revolution
White Revolution is a programme introduced in India to increase
production of milk in India. This programme made India self –
sufficient m production of milk.
Similarly Blue Revolution was introduced to enhance fish production
and Yellow Revolution was introduced to increase oil production.
Types of Crops
Cereals (wheat, Rice, Maize, Millet, Sorghum) provide us
carbohydrates.
, Pulse (gram, pea, black gram, green gram, pigeon pea, lentil) provide
us proteins.
Oil Seeds (soya bean, ground nut sesame, castor, mustard, linseed,
sunflower) provide us fats.
Vegetables, spices, fruits provide us vitamins & minerals.
Fodder crop (berseem, oats, sudan grass are raised as food for the
livestock are called as fodder crops.
Crop Season
Different crops require different conditions (temp, moisture, etc.),
different Photo - periods (duration of sunlight) for their growth and
completing life cycle.
There are following two distinct season crops:
Kharif Season:
June to October (Rainy season).
Monsoon requires more water.
Paddy, soyabean, pigeon pea, maize, black gram, green gram
and rice are kharif season crops.
Rabi Season:
Nov. to April.
Requires less water.
Wheat, gram, peas, mustard and linseed are rabi season crops.
Improvement in Crop Yield
Yield increases when production increases from same amount of land
in same period of time.
Approaches which enhance the crop yield are as following:
1. Crop Variety Improvement
2. Crop Production Improvement
