MODELING THE WATER BALANCE COMPONENTS OF THE SOYBEAN CANOPY BY SOIL-VEGETATIONATMOSPHERE TRANSFER MODEL - Soybean and Wheat Crops: Growth, Fertilization, and Yield - page 39

Chapter 3
M ODELING THE W ATER B ALANCE C OMPONENTS OF
THE S OYBEAN C ANOPY BY S OIL -V EGETATION -
A TMOSPHERE T RANSFER M ODEL
D. T. Mihailović * and B. Lalić
Faculty of Agriculture, Department for Field and Vegetable Crops,
University of Novi Sad, 21000 Novi Sad, Serbia
A BSTRACT
In recent years, though, expansion of soybean croplands has been increasingly
important in the agricultural or production in many parts of the world. There are a lot
attempts to set this cultivar in the modeling focus, from different points of view
(microclimate, irrigation, crop, land surface, climate cahnge, etc.). However, regardless
the model is used, the interaction of surface and subsurface runoff and soil moisture, the
simulation of total evaporation (or latent heat) are always highly ranked in the modeling
hierarchy.
This chapter deals with the simulation of the water balance components of the
soybean canopy using a surface scheme. In that sense we used the hydrological module in
the Land-Air Parameterization Scheme (LAPS) developed at Faculty of Agriculture,
Department for Field and Vegetable Crops, University of Novi Sad (Serbia). It is
designed as a software package that can be run as part of an environmental model or as a
stand-alone one. The LAPS includes modeling the interaction of the land surface and the
atmosphere, under processes divided into three sections: subsurface thermal and
hydraulic processes, bare soil transfer processes and canopy transfer processes. They are:
interaction of radiation with vegetation, evaporation from bare soil, evapotranspiration
including transpiration and evaporation of intercepted water and dew, conduction of soil
water through the vegetation layer, vertical water movement in the soil, surface and
subsurface runoff, heat conduction in the soil and momentum transport within and above