Q. How many horizons are there in soils?

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Q. A–horizon soil consists of partially decomposed organic matter.

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Q. Which horizon helps to determine the pH of the soil?

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Q. What is called for the mixture of all the contents of soil?

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Q. Why area treatment is important for soil?

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Q. What is called for the movement of surface litter and topsoil from one place to another?

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Q. Why continuous contour trenches are used?

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Q. What is used to convert wastelands into agricultural lands?

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Q. Organic agriculture advocates avoiding the use of_____________________

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Q. Integrated pest management reduces the excess use of fertilizers.

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Q. Which is the most input of waste causing marine pollution?

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Q. Why ship accidents cause marine pollution?

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Q. Which of the following is the greatest volume of waste discharge to water?

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Q. When does the rate of aerobic oxidation reduced in the sewage that is reduced to the water?

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Q. Which of the following way is used to reduce the pollution load on marine water?

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Q. The Deepwater Horizon oil spill considered amongst the largest oil spills in history.

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Q. What is the reason that oil pollution attracts the greatest attention?

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Q. The natural process of emulsification of oil in water can be accelerated through the use of chemical dispersants.

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Q. What is the first step in primary sewage treatment plants?

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Q. What is called for the removal of sand, gravel in the primary treatment of sewage treatment plant?

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