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Environmental Policy Integrated Climate (EPIC) Model

The Environmental Policy Integrated Climate (EPIC) model is a cropping systems model that was developed to estimate soil productivity as affected by erosion. It predicts effects of management decisions on soil, water, nutrient and pesticide movements, and their combined impact on soil loss, water quality, and crop yields for areas with homogeneous soils and management.

Inputs

Crop type, site ID, list of field operations, tillage and equipment, pesticides, and pesticides,

Outputs

Simulated water. carbon, nitrogen, phosphorus, potassium, and salt average values and balances.

Release Notes

Under certain conditions, a bug in NAJN subroutine was generating negative values for the soil NH3 content. The bug was eliminated by modifying the initial IF statement to consider the possibility of crop nutrient demand equal zero. The source code has been modified as follows: 

Original version: IF(X2<1..AND.DMD>0.)THEN 

Modified version: IF(X2<1.0.OR.DMD==0.0)THEN 

The format of the DHS output file has been slightly modified by adding an extra space between variables. Modifications done in BSIM, format 682 for the variables and 731 for the header

Format:

Download

Audience:

Researcher, Extension, Producer, Land Manager

Time Investment:

Medium

Release/Version:

1102

Spatial Scale:

Farm/Forest

Time Scale:

User-defined

Tool Developers:

Texas A&M Agrilife