6 julio 2015
Converting large tracts of the Midwest’s marginal farming land to perennial biofuel crops carries with it some key unknowns, including how it could affect the balance of water between rainfall, evaporation and movement of soil water to groundwater.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/OLqJfhEZG0k/150706154900.htm
