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Chemical Trade - The Backbone of Agricultural Development

 

Over very long time, human food and clothing depended primarily on agriculture. While ever for the reason that historic time, agriculture had always relied on loads of human labor, which was subject to varied kinds of natural conditions. So the development of agriculture was very slow. During the 19th century, the usage of agricultural machinery gradually improved the working conditions. Nonetheless, in agricultural production, it was the application of chemical fertilizers and pesticides that really increased the agricultural output in per unit area.

 

 

Follow shows that, among all the measures to extend the agricultural production, the function played by chemical fertilizers is forty% to 65%. On the idea of the booming in the petrochemical trade, synthetic ammonia and urea have realized massive-scale production, which makes the output of chemical fertilizer occupy a large proportion in the chemical products. In 1985, the total output of chemical fertilizer on this planet amounted to approximately a hundred and forty million ton, which made it develop into one of many bulk chemical products. Lately, the development of nitrogen, phosphorus and potassium compound fertilizer and hint components fertilizer has further meet the calls for of different soil constructions and completely different crops.

 

 

In the early interval, people used natural animals, plants and minerals to prevent and deal with crop pests and diseases. Till the late 19th century, after the formation of contemporary chemical business, folks began to make use of arsenic preparation to kin poor health beetles on potato, and use Bordeaux combination to prevent and deal with downy mildew on grapes, in order that agriculture started a new period of chemical prevention and treatment. Through the 1940s, plenty of pesticides and herbicides, reminiscent of organic chlorine, organic phosphorus, were produced and widely utilized in agriculture, forestry, animal husbandry and public health. However, a few of the pesticides throughout this period were rich in residues or poison, which caused ecological air pollution, so they had been banned by many countries.

 

 

In recent times, a number of efficient, low-residue, low-toxicity pesticides have been developed, including pyrethroid, which is a bionic pesticide and will not pollute the environment. It has been put into industrial production. In consequence, bio-pesticides have become the most active areas in pesticide research currently.

 

 

What's more, plastic film (akin to high pressure polyethylene, linear low density polyethylene, etc.) has been utilized in modern agriculture, which is used for mulching film or greenhouse seedlings. It can significantly enhance the output of the crops, so it is now being popularized on a large area.

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