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Hairy Vetch in the Open Field

This tangled mass of vegetation suggest the vigor of growth of hairy vetch. The vetches are legumes, and, as elsewhere explained, secure a portion of their nitrogen from the air, with the aid of nitrifying bacilli that colonize their roots. This gives them an advantage that enables them to thrive in close quarters, as here shown.

Hairy Vetch in the Open Field

This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 8 Chapter 3