38
P. Cepuder and V. aus-der-Schmitten
Community of
Markg rafneusiedl
I. . . .60 % CR1, 40%
II .. . 1 00 % CR2
III. . 50% CR3, 50% CR4
Fig. 4. Areas with different crop rotations in the Marchfeld Plain
Weather
Hydrology
Daily weather data can be based on
Runoff, percolaUon, lateral subsurface
measurements andlor generated
flow and snow melt are generated
stochasUcally
Econom ics
Erosion
A simple accounting package is
EPIC
EPIC simulates soil erosion caused
included to calculate the costs of
by wind and water
inputs and compute returns
cro~ and soil management
Nutrient Cycling
The PIC model Is capable of
The model simulates nitrogen and
simulating a variety of cropping
Environmental
phosphorus fertlJizatioln, crop uptake
variables, management practices and
and nutrient movement
naturally occuring processes
Policy
Crop Growth
Integrated
Pesticide Fate
A single crop model capable of
Climate
Pesticide movement with water and
simulating major agronomic crops,
sediment as well as degradation on
pastures and trees is used
foliage and in soil can be simulated
Tillage
Soil Temperature
The effects of tillage equipment on soil
Soil temperature responding to weather,
hydrology and nutrient cycling can be
soil water content and bulk dens~y is
simulated
computed daily in each 90illayer
Fig. 5. Ten major components of the EPIC model (USDAIARS 1992)