May, 1921] 
DICKSON — COMPOSITION OF OAT PLANT 
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present in the complete nutrient solution. It is slightly reduced in both 
grain and straw by a similar deficiency in potassium, and is increased by a 
similar reduction of calcium or nitrogen. 
Fig. 2. Graphic representation of the average monthly temperatures and average 
monthly precipitation at Pullman, Washington, and Madison, Wisconsin, for the duration 
of the cultural experiments. 
3. Although the variations in composition are more pronounced in the 
straw, yet in general they are similar in both grain and straw. 
