Clover is an excellent nitrogen fixer. I found out by being lazy and not fertilizing my lawn. In a few years I have a lot of clover and much less grass. I was w

Clover is an excellent nitrogen fixer. I found out by being lazy and not fertilizing my lawn. In a few years I have a lot of clover and much less grass. I was wondering why and found out about nitrogen fixation from air. Granted can't substitute it as food crop but lawns also cover a good amount of area.