Dear All,
I am using DSSATv4.5 for simulating the wheat yield over different sites in Northern India. Here during the months of December and January, there will be no sunshine (Sunshine hours= 0) hours. But while estimating the solar radiation from sunshine hours during no sunshine hours days will be minimum of 5.4 to 6.0 based on the solar angle and latitude (and the constants a and b). The actual radiation will be more than this. This means we are using low solar radiation values and most of the simulations, the biomass production will be far below the actual. But the grain yield will be comparable.
My point is whether any other methodology to estimate solar radiation under these circumstances. ie from temperature. Please suggest.
Thanks to all.
With regards
Subash
