Is there any evidence that living legumes make the nitrogen they fix available to other plants nearby? I thought they locked it up in root nodules and it only becomes bioavailable if you chop and drop the legumes so that the nodules break down and release nitrogen into the surrounding soil. Otherwise the legumes are just going to use the nitrogen for their own growth.
There is no Biden election gamble. US presidential elections happen every 4 years whether Biden (or any other president) likes it or not.
It’s a Macron election gamble because he actually called the election himself to try to benefit himself. This might turn out to backfire.