480 Journal of Agricultural Research voi. vi. no. 13 



plants were harvested on August 22, while in 191 5 they were planted on 

 May 22 and harvested on August 18. The water requirement of this 

 variety of com, based on the total dry matter of the aerial parts, was 

 found to be 396±i6 in 1914 and 299±8 in 1915. 



In 1 914 two cans were planted to white Chinese com. The growing 

 season of these plants was from May 26 to August 22. The water 

 requirement, based on the dry weight of the aerial parts, was 418 ±7. 



In 1 914 four cans were planted to the F3 generation of a segregate of 

 a hybrid corn developed by the Department of Botany of the Kansas 

 Experiment Station. Five cans of the F4 generation of this hybrid were 

 grown in 191 5. Its water requirement, based on the total dry matter 

 of the aerial parts, was 355 ±8 and 246 ±6, for the years 1914 and 1915, 

 respectively. 



SORGHUMS 



Dwarf milo and Blackhull kafir were the only sorghums grown in 1 914. 

 In addition to these two varieties, dwarf black-hulled white kafir, f eterita, 

 and Sudan grass were grown in 191 5. The results for the two seasons 

 are shown in Tables V and VI. 



Six cans of Dwarf milo were planted in 1914 and eight cans in 1915. 

 The plants in the former year reached a height of 3 feet, and during the 

 latter year they stood 4>^ feet high (PI. lyXXI, fig. i). The growing 

 season was from May 26 to August 22 in 1914, and from May 22 to Sep- 

 tember 3 in 1 91 5. The water requirement, based on the total dry matter, 

 including the roots, was found to be 319 ±5 in the former year and 228 ±3 

 in the latter. The water requirement, based on the total dry matter of 

 the aerial parts, was 340 ±5 and 244 ±3 for the years 19 14 and 191 5, 

 respectively. The water requirement, based on the production of grain, 

 was 1,022 ±100 in 1914 and 5o8±6 in 1915. 



Blackhull kafir was grown in six cans in 1914 and in eight cans in 1915. 

 The seed was planted on May 26 and the plants were harvested on Septem- 

 ber 3 in 1914, while in 1915 the growing period was from May 22 to Sep- 

 tember 18. The plants reached a height of 6 feet in each of the growing 

 seasons (PI. LXXII,fig. 3). The water requirement, based on the total 

 dry matter, including the roots, was 305 ±6 in 1914 and 204±2 in 1915, 

 while the water requirement, based on the total dry weight of the aerial 

 parts, was 325 ±7 for the former year and 2 17 ±2 for the latter. The 

 water requirement, based on the production of grain, was 1,178 ±45 in 

 1914 and 696± 19 in 1915. 



