Nitrate can be absorbed by roots as it can be lost by

Nitrate can be absorbed by roots as it can be lost by Leaching.
Nitrate can be absorbed by roots as it can be lost by the process of Leaching. Nitrogen can be lost from agricultural lands through soil erosion and runoff.
Leaching is the loss of water-soluble plant nutrients from the soil or applying a small amount of excess irrigation to avoid salinity.