Q6 of 465 Page 54

Why is use of excess fertilizer detrimental for environment?

Use of excess fertilizers tend to cause:

(i) Mineral loading in underground water.


(ii) Excess of minerals in the crop plants.


(iii) Salinization and aridity of soil.


(iv) Runoff from fertilizers rich soil, will cause eutrophication of water bodies and harm to water organisms.


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4

List out some useful traits in improved crop?

 5

Why is organic matter important for crop production?

 7

Give one word for the following:

(a) Farming without the use of chemicals as fertilizers, herbicides and pesticides is known as ...


(b) Growing of wheat and groundnut of the same field in called ...


(c) Planting of soybean and maize in alternate rows in the same field is called …..


(d) Growing different crops on a place on a piece of land in pre planned succession is known as ....


(e) Xanthium and Parthenium are commonly Known as....


(f) Causal organism of any disease is called as......

 8

Match column A and Column B











Column A



Column B



(a) Milch


(b) Sahiwal, Red Sindhi


(c) Cattle used for tilling and carting


(d) Indian breed of chicken


(e) Chicken better fed for obtaining meat



(i) Milk producing female


(ii) Broiler


(iii) Draught animals


(iv) Local breed of cattle


(v) Aseel obtaining meat