Mulches are mainly used to reduce?

Source of negative charges on silicate clays is/ are________?

A flow of water for a certain discharge when total energy of flow i.e. sum of potential, kinetic and pressure energies is minimum is called________?

The first attempt to show linkage in plants were done in________?

The quantity of water lost by transpiration from the plants or crops and evaporation from fields adjacent to these plants is called ________?

Color off basic matic rock is________?