Apologies for cross postings.
 
The Windows version of  SIGNIWA, grass growth, nitrogen and water
cycling in the monoculture and/or mixture has
been  released.
 
Compared to the old version (DOS) released in May, 1997, water and heat
simulation have be built in. The processes now include in the model
photosynthesis, respiration, the allocation of net photosynthesis to
leaf, stem and root, leaf death, digestibility which will determine
cutting dates and times in a year, decomposition of organic matter,
slurry application, mineralization, immobilization, nitrification,
denitrification, leaching, plant uptake of notrogen and N fixation,
evapotranspiration, water uptake, ground water and surface pool, snow,
water flow in the soil, thermal properties and frost, etc. There are 382
variables which
include every aspects of grass growth and development, nitrogen and
water cycling,  and heat transformation.
 
The model runs in Windows 95 or later operating system with 8Mb memory,
High colour (16 bit), 800x600 or higher resolution and more than 10Mb
disk free spaces (highly depending on simulation situation).
 
The SIGNIWA is free of charge to distribute, if you are interested in
and would like to recieve this model, please contact me.
 
Lianhai