Investigations at Lincoln, Nebraska. 



53 



the longer ones had a few secondary laterals, mostly less than 0.4 inch long. 

 On smaller plants nearly all of the laterals were less than 0.5 inch in length 

 and extended out in a more or less horizontal direction or turned somewhat 

 obhquely downward. On all roots the 2 to 4 inches nearest the tip were 

 glistening white and unbranched. Nodules were abundant. 



A third examination of the root development was made July 24 on both 

 upland and lowland areas. The plants were 115 and 106 days old respec- 



FiQ. 24.— A. Alfalfa 63 days old. B. Sweet clover 63 days old. 



tively. Those in the upland area averaged 1 . 1 feet in height, the tallest reach- 

 ing 1.4 feet. They had developed normally in every way, but were somewhat 

 affected by ''white spot." On the lowland the crop averaged 1.7 feet high, 

 the tallest plants reaching 2 feet. It has abeady been pointed out (p. 45) 

 that June was a very favorable month for growth. Excellent growth con- 



