HORTICULTURE

Detailed explanation-1: -There’s general agreement among plant physiologists that there are three mechanisms by which nutrients reach the surface of the root hairs. These are: 1) root interception, 2) mass flow, and 3) diffusion.

Detailed explanation-2: -Nitrogen Fixation. Since nitrogen is a primary component of both proteins and nucleic acids, nitrogen deficiency imposes significant limitations to plant productivity.

Detailed explanation-3: -Nitrogen is the most critical element obtained by plants from the soil, to the exception of moist tropical forests where phosphorus is the limiting soil nutrient, and nitrogen deficiency often limits plant growth. Plants can use the nitrogen as either the ammonium cation (NH4+) or the anion nitrate (NO3−).