“The more you’ve allowed your grassland to invest in its roots, the better off it is going to be during a drought,” said Randy Jackson, a grassland ecologist and professor at the University of Wisconsin-Madison. Perennial plants—which stay in the ground year in and year out—continue to “photosynthesize and put their carbon and nutrients below ground, which is really their savings account.” In times of drought, it will draw more on the savings in the ground.
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