Explanation

(a) Parts labeled A - F are;

• A - Floating organic materials;
• B -Water;
• C - clay / clay particles;
• D - Silt,
• E - fine sand / sand
• F - Coarse sand / gravel / small stones

(b) Major constituents of soil are;

• Minerals - sand, clay etc;
• Organic matter;
• Water
• Air;
• Micro organisms.

(c) Other methods of determining soil texture are;

• Feelíng method by rubbing soil between thumb and the fingers
• Moulding into rings when wet.
• Sieve method. 
• Pipette method.
• Hydrometer method.

(d) Importance of soil texture to the farmer:

• useful in the evaluation of soil,
• ability to supply mineral nutrients,
• support of soil micro organisms essential for plant growth,
• determines the relative proportion of air and water in the soil,
• determines movement of air and water in the soil,
• helps to determine the type of crops to be planted or to grow,
• helps to determine tillage practice to be adopted by the farmer.

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