PLATE 2 
A. —Cultures of buckwheat on soil in climatic chambers in 1920 
Six left-hand cultures at lower temperature. 
Six right-hand cultures at higher temperature. 
B. —Cultures of buckwheat on sand in climatic chambers in 192 
Six left-hand cultures at lower temperature. 
Six right-hand cultures at higher temperature. 
48107—23 - 3 
