Question

Zero tillage is a method of conservation tillage. Which of the following statements are true about it:
A. Zero tillage is an extreme form of minimum tillage.
B. In Zero tillage, herbicide functions are extended
C. It is an energy consuming operation
D. It promotes the rapid decomposition of soil organic matter
E. In Zero tillage, primary tillage is completely avoided and secondary tillage is restricted to root zone only.

• A. A, B, C, D only
• B. A, D, E only
• C. A, B, E only
• D. A, B, D, E only

Hint:

Zero Tillage = No Ploughs. It saves Fuel, saves Time, and saves Organic Matter. Just remember: No-till requires heavy reliance on herbicides for weed control.

Answer 1

The Correct Option is C

Concept: Zero tillage (no-till) is a conservation practice where the soil is left undisturbed from harvest to planting. It aims to reduce erosion, save energy, and improve soil structure.

Step 1: Verify the definition and application (A and E).
Statement A is correct: Zero tillage is the extreme version of minimum tillage where the soil is not turned at all. Statement E is correct: Primary tillage (ploughing) is completely skipped. The only disturbance is the narrow slit made by the seed drill for placing the seed (secondary tillage in the root zone).

Step 2: Evaluate chemical and biological impacts (B and D).
Statement B is correct: Since mechanical weed control (tillage) is removed, herbicides become the primary tool for weed management, thus extending their function. Statement D is incorrect: Tillage usually *speeds up* decomposition by aerating the soil. Zero tillage actually slows down decomposition, helping to build up soil organic matter over time.

Step 3: Evaluate energy use (C).
Statement C is incorrect: Zero tillage is an energy-saving operation because it eliminates multiple passes of heavy machinery for land preparation.