Nutrient Leaching and Runoff

Applies to: Silage Production

Description:

This indicator refers to the prevention of nutrient loss by leaching and runoff and its impact on nearby waters. Excessive supply of nutrients can cause eutrophication i.e. excessive growth of phytoplankton leading to hypoxia (depletion of oxygen in the water). The indicator considers implementation of mitigation practices (appropriate application rate of fertilisers based on soil characteristics, efficient fertiliser application method, appropriate timing of fertiliser application (in regards to weather condition and vegetation periods), reduced tillage, carefully managed irrigation (if any), green fertilization, use of cover crops, implementation of extended rotations, edge-of-field practices (buffer zones, wetlands, terraces, sediment controls), use of nitrification inhibitors, integrated pest management (IPM).

Question:

Which practices are implemented that abate nutrient leaching and runoff?

Rating:

At least four practices implemented (including IPM)

At least two practices implemented

One or no practices implemented

Sources of information:

EBRD. 2014. Environmental and Social Policy.

Iowa Department of Agriculture and Land Stewardship. 2016. Clean Water Iowa. http://www.cleanwateriowa.org/

Ongley E.D. 1996. Control of Water Pollution from Agriculture. FAO Irrigation and Drainage Paper 55. FAO, Rome.