Bui. 230, Bureau of Plant Industry, U. S. Dept. of Agriculture 



Plate II. 





Fig. 1 .— At the Left: Boone County White Corn, Kubanka Wheat 1440, and 

 Juncus Balticus. At the Right: Early Rose Potato and Kubanka Wheat 

 1440. Fig. 2.— Coleus and Kubanka Wheat 1440. 



THE SIMULTANEOUS WILTING OF PLANTS GROWING IN THE SAME 



SOIL MASS. 



