antoinet111 wrote:1 / on the rest I'm not strong in calculation so I do not look, despite everything, I do not think he's losing.
2 / By the way, willow needs much more water and nutrients than miscanthus (C4 plant plus carbon yield).
3 / the fact that it can grow on polluted soil is only secondary, I do not know any producer who uses polluted soils.
1 / I admit that I put quotes on win / lose. All my training is based on agriculture and this had to be almost reduced to a skin of grief to provide good data on real agriculture well "thought out".
What I see is a little: "it's fashion", "we make a lot of money with little energy (vehicles, treatments, fertilizers ... etc ...)" "if they say it is what it is true ". But for how long, because once again the product is different but the substance is identical so the result will quickly be found in everything we currently find in agriculture.
2 / We know that the carbon yield is skewed: a plant cannot be "competitive" (sorry for the stupid term but hey .... ) that if the benefits of its photosynthesis surpasses the others: example: a plant in C4 (miscanthus for example) tolerates higher temperatures and conditions more arid than a plant in C3 (such as willow). Conversely these same plants in C4 can not be conccurential to a plant in C3 at a temperature below 25 ° C ... Now I made a simple calculation easy to redo can be with other data (can to be that those found are not good ), always is that, I see that it is not interesting for a person who wants to make his heating fuel: not profitable. And that we are here on a production on the short term (idem that the whole of agriculture) with an energy cost certainly less important than other productions but which remains in the same optics: unique production for the short term. .. again I may be missing data to have a correct judgment .
3 / You do not know any producer who uses polluted soil ... hum! This is badly sought, the majority of farmers cultivate on depleted soil and more polluted (some pollutant elements added by the farmer are found several years in the water table because they have difficulty going down). The majority of cultivated soils are polluted hence the interest of cultivating this plant, but looking well I am sure that we can find better ... ;-)