PLATE IV 



Fig. I. — Northwestern Dent corn (pots 277 to 282), grown June 9 to September 16, 

 1912. Photographed on September 6, 1912. The lower leaves were picked off as 

 they became dry and placed in bags attached to the pots, thus avoiding loss of dry 

 matter. Water requirement, 28o± 10. 



Fig. 2. — Hopi corn (pots 295 to 300), grown June 12 to September 26, 1912. Pho- 

 tographed on September 9, 1912. The lower leaves were picked off as tliey became 

 dry and placed in bags attached to the pots. Water requirement, 285 ±7. 



Fig. 3. — White durra (pots 235 to 240), grown June 9 to September 26, 1912. Pho- 

 tographed on September 6, 1912. The lower leaves were removed as soon as they 

 became dry and placed in bags attached to the pots. Water requirement, 255±3. 



Fig. 4. — Red Amber sorghum (pots 253 to 258), grown June 29 to September 27, 

 1912. Photographed on September 7, 1912. Water requirement, 237 ±4. 



Fig. 5. — Minnesota Amber sorghum (pots 247 to 252), grown June 9 to September 26, 

 1912. Photographed on September 9, 1912. Water requirement, 239±2. 



