NPK Management in Soils. Introduction Soil Nitrogen (N) Dynamics Soil Phosphorus (P) Dynamics Soil Potassium (K) Dynamics. Introduction. NPK as the three principal fertilizer elements have the most widespread influence on both natural and agricultural ecosystems.
Soil Nitrogen (N) Dynamics
Soil Phosphorus (P) Dynamics
Soil Potassium (K) Dynamics
Component of essential plant compounds
Plants respond to good available N by having
When too much N is applied, the following may occur:
Strategies for Achieving the Objectives:
2.1. Phosphorus and the environment
P poor soils provide little vegetative cover to prevent land surface wash by erosion, and eroded materials sediment down stream.
P enters streams from point and nonpoint sources.
Timber harvest, livestock grazing, fertilizers and application of animal wastes, and soil tillage.
Nonexchangeable-K Exchangeable-K Soil Solution-K