This preview shows page 1. Sign up to view the full content.
Unformatted text preview: ust, straw, etc.), will
increase biological activity and cause a greater
demand for N, and thus result in N immobilization
Immobilization only temporarily locks up N. When
the microorganisms die, the organic N contained
in their cells is converted by mineralization and
nitrification to plant available nitrate. For more information Leaching is a pathway of N loss of a high concern
to water quality. Soil particles do not retain nitrate
very well because both are negatively charged. As a
result, nitrate easily moves with water in the soil.
The rate of leaching depends on soil drainage,
rainfall, amount of nitrate present in the soil, and
The EPA has set the maximum contaminant level
for drinking water at 10 ppm N as nitrate.
Well-drained soils, unexpected low crop yield,
Department of Crop and Soil Sciences Nutrient Management Spear Program
Courtney Johnson, Greg Albrecht, Quirine Ketterings,
Jen Beckman, and Kristen Stockin
2005 2 College of Agriculture and Life Sciences...
View Full Document
This note was uploaded on 10/12/2012 for the course BIOTECH BT101 taught by Professor Gardy during the Spring '12 term at Indian Institute of Technology, Chennai.
- Spring '12