NIE option. 1. Which of these factors affect soil formation?
a. Climate c. Characteristics of the parent rock b. Slope of land d. All of these
2. Which of these layers of soil is usually characterized by cracks and crevices, and difficult to dig beyond it?
a. Topsoil b. Subsoil C. C Horizon d. R Horizon
3. Which of these soils retains moisture and becomes very sticky when wet?
a. Sandy soil b. Clayey soil d. Both a and b C. Loamy soil
4. Which of these adjustments help to make the soil fertile?
a. Alteration of pH b. Aeration C. Addition of fertilizers d. All of these
5. Which of these measures will help to control soil pollution?
a. Acid rain and acid water b. Improper dumping of garbage in soil C. Using organic pesticides d. Spilling or leakage of chemicals
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Nanotechnology is the term given to those areas of science and engineering where phenomena that take place at dimensions in the nanometre scale are utilised in the design, characterisation, production and application of materials, structures, devices and systems.
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Nanotechnology is the term given to those areas of science and engineering where phenomena that take place at dimensions in the nanometre scale are utilised in the design, characterisation, production and application of materials, structures, devices and systems.
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