Pesticides

Select the appropriate options and complete the following paragraph. ( organic farming, humus, oxidation, increase, pesticides, fertilizers, nitrogen, biomagnification, decrease) The uppermost layer of soil is made up of ---that is essential in agriculture. Essential elements like ___ , phosphorous and potassium need to be made.available to the crop plants. Chemicals used in agriculture, __ _ the fertility of soil. Use of ___ like DDT 1iave also. proved to be dangerous, since the poison enters the food-web and causes problems due to -,-----of the compound. To overcome these problems, farmers are opting for the practice of ___ .

We have seen the example of expenditure and income (in terms of polynomials) of Govind who is a dry land farmer. He has borrowed rupees one lakh twenty, five thousand from the bank as an agriculture loan and repaid the said loan at 10 p.c.p.a. He had spent 10,000 on seeds. The expenses on soyabean crop was 2000x for fertilizers and pesticides and 4000x^2 was spent on wages and cultivation. He spent 8000y on fertilizers and pesticides and 9000y^2 on cultivation and wages for cotton and tur crop. His total income was rupees 14000x^2 + 25000/3y^2 + 16000y . By taking x = 2, y = 3 write the income-expenditure account of Govind's farming.

Read the following passage write the appropriate amount in the boxes and discuss. Govind, who is a dry land farmer from Shiralas has a 5 acre land. His family inclde his wife two children and his old mother. He borrowed one lakh twenty five thousand rupees from the bank for one year as agriculatral loan at 10 p.c.p.a . He cultivated soyabean in x acres and cotton and tur in y acres. He spent Rs. 10,000 on seeds. The expenses for fertilizers and pesticides for the soyabean crop was 2000x rupees and 4000x2 rupees were spent on wages and cultivation of land. He spent 8000 y rupees on fertilizers and pesticides and rupees 9000 y2 for wages and cultivation of land for the cotton and tur crops. Let us write the total expenditure on all the crops by using variables x and y. rupees. He harvested 5x2 quintals soyabean and sold it at Rs. 2800 per quintal. The cotton crop yield was 5/3y2 quintals which fetched Rs. 5000 per quintal. The tur crop yield was 4y quintals and was sold at Rs. 4000 per quintal. Let us write the total income in rupees that was obtained by selling the entire farm produce, with the help of an expression using variables x and y. square + square + square rupees