Assuming straw is readily available locally, it is the cheapest energy source
Large fuelstock storage area required.
There is a lot less competition for straw as a fuelstock, as more specialist equipment is required to burn it.
The existing market for straw centres around animal feed and bedding and producers and buyers are usually some distance apart. This means transport costs and delivery logistics limit its value. A Biomass energy project can represent a good opportunity where there is a good local supply of straw and suitable fuelstock storage.