Question

13.
The minimum furrow grade to assure surface drainage is:
Options:
1.0.09%
2. 0.02%
3. 0.07%
4. 0.05%

Answer 1

Answer:

0.05%

Explanation:

Furrow is a long, narrow irrigation trench made in the ground used for an optimal supply of water.

Furrows can be level and are very similar to long narrow basins. However, a minimum grade of 0.05% is recommended so that effective drainage can occur following irrigation or excessive rainfall.