DESCRIPTION OF COURSES

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SSAC 607 MODELLING SOIL PLANT SYSTEM                                                                               (3L+1P) III

Objective
To train the students in concepts, methodology, technology and use of systems simulation in soil and crop studies

Theory

UNIT I
Introduction, terms and definitions; classification of models; steps of modelling; Taylor series; numerical methods of differentiation and integration; convergence and stability of models.

UNIT II
High level computer language - FORTRAN its commands and usage; testing and evaluation of model.

UNIT III
Description of spatially homogeneous models; K transformation model; model on carbon, nitrogen and phosphorus dynamics in soil.

UNIT IV
Spatially heterogeneous models; equation of continuity; simulation of water flow through soil; explicit and explicit-implicit method; simulation of solute movement through soil by explicit method and with variable moisture flux by explicit-implicit method.

UNIT V
Nutrient uptake models; water uptake models; sensitivity analysis, parameter ranking and model simplification.

Practicals
Testing and usage of FORTRAN commands; writing, compiling, linking and execution of FORTRAN modules on i) K transformation and equilibria in soils, ii) C, N and P transformation in soils, iii) water and salt movement in soils, and iv) nutrient uptake by plants.

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