Agricultural Sciences

A Textbook of Agronomy by B. Chandrasekaran; K. Annadurai; E.Somasundaram

By B. Chandrasekaran; K. Annadurai; E.Somasundaram

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3 per cent per annum due to high population growth rate. The FAO estimates clearly indicate the increasing shortage of cereals in 90 developing countries. Increase in food all over world during the decades of 1972–92 was remarkable. Productivity and production in the technologically advanced agriculture of the developed countries rose to heights that would have been unbelievable half a century ago, mainly due to introduction of high yielding varieties (HYVs) responsive to inputs of fertilities and irrigation water, besides increase in area under cultivations.

The formation of the Deccan trap continued in the Tertiary Period. Deccan trap covers Sind, Kutch, Bihar, and the coastal areas of Andhra Pradesh. 3048 metre The uplift of the Himalayan system of mountain ranges was due to movements of two solid continental masses on two sides of the Tethys ocean, directed towards one another. The Central Asian 28 A TEXTBOOK OF AGRONOMY continental mass, Angaraland, slowly moved from the north to the south under pressure from the floor of the Arctic Ocean, and the northern edge of the Indian continental mass, the Gondwanaland, became down warped by the northward compressive force from the Indian Ocean.

G. Contribution to Purchasing Power of People Agriculture provides purchasing power not only to those directly engaged in it but to others also who are in the industries and services. When farmers earn more they also spend more. In the process, they create new markets and new opportunities for hundreds of blacksmiths, carpenters, masons, weavers, potters, leather workers, utensil-makers, tailors, cotton ginners, oil pressers, transporters and countless others. Thus, there are many industries, the prosperity and employment of which are dependent upon the purchasing power of the agricultural population.

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