Page 13 - Science Class 08

Pollens from another variety (say B) are damage come to the environmental resources.
transferred to the s gma of the first emasculates Water harves ng has become necessary and
plant A and it is covered with a plas c bag. rain-water must be allowed to seep into the

The seeds produced by this cross-breeding are earth to raise the water level. The harvested
grown for several genera ons to acquire the water can be used for hor culture as well.
desired features in the new seed called stock. OUR RESPONSIBILITY
We have developed three improved varie es of We achieved the goals of the Green Revolu on
wheat (Sonalika, Kalyan, Sona), three new during the 1970’s through improved farming
varie es in paddy (Jaya, Padma, Pusa 215) and techniques. But food produc on needs to be
two improved varie es in maize (Ganga 101 ever on the increase in view of the ever-
and Ranjit). growing popula on. We must raise our output

Though the introduc on of the new varie es of food stuffs from 200 million tonnes to 300
has increased the produc on of corn a lot, yet million tonnes. It needs a joint effort by farmer,
they have adversely affected the soil, water scien sts and common people.
and cul va on of other crops. The water table It is also advisable to save food stuffs for use in
has fairly gone down. So, while introducing any emergency situa on. Such reserve stocks are
new varie es of crops, we must not let any called buffer stocks. Moreover, food stuffs must
not be wasted in any way.

Agriculture : The practice of preparing soil, sowing seeds in it to grow useful
food crops and other cash crops
Domestication : The cultivation of a plant for food or taming animals
Cultivation : To prepare land for growing crops on it
Nutritional : Relating to the process of providing or obtaining the food
necessary for health and growth
Vegetative propagation : The process of plant reproduction
Fertilizers : The chemicals or natural substances added to soil or land to
increase its fertility
Indigenous : Originating or occurring naturally in a particular place

Let's Revise evise evise evise evise evise evise
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i Agriculture includes both the cultivation of crops and the domestication of animals.
i Crops are the plants which are grown in large quantity for food.
i Preparation of soil involves two methods namely loosening and levelling.
i Field follow is a method in which a particular field is left without crops for one or more
seasons so that the field could regain its nutrients.

i Mixed cropping means growing of two or more types of crops in a particular field in the
same season.
i Adding compost to the soil to increase its fertility is called composting.

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