While designing a grain bin, which formula takes into account the friction between the grain and bin wall?

Bench terrace sloping outwards are effective only in

The On-Farm Development (OFD) activities undertaken under Command Area Development include: (A) Construction of field channels and drains (B) Reclamation of waterlogged areas (C) Renovation and rehabilitation of minor irrigation tanks

Geohydrological unit of the land which drains through a common point is called

Given below are two statements: Assertion (A) and Reason (R). Assertion (A): Mechanical measures include contour bunding, contour cultivation and bench terracing. Reason (R): Mechanical measures consist of destruction of mechanical barriers across the line of flow of water.

Bench terrace sloping outwards are effective only in