MICHIGAN EXPERIMENT STATION BULLETINS. 

 Table V a. — Average for two years. 



129 



Table VI. — Showing gain over seed to gain over seed at different distances. 



( Halves, weighing 6'/4 pounds 



1 foot-- ■< Qnarters, weighing four pounds.. 



( Eyes, weighing 2,}i pounds 



1J4 feet.-Eyes, weighing 1 3-16 pounds 



( Halves, weighing 5 pounds 



VA feetj Quarters, weighing 2V4 pounds 



( Eyes, weighing 15 ounces 



12£ feet.-Eyes, weighing 13 ounces 



( Halves, weighing 3 pounds 



2 feet.. ■] Qnarters, weighing 1 10-16 pounds 



( Eyes, weighing 10 ounces 



91/ foQf 5 Halves, 5M pounds 



^/2 reet^ Quarters, 2 2-16 pounds 



Difference. 



84.1 

 75.3 

 62.4 



71.8 



92.4 

 81.4 

 58.58 



48.2 



101.7 

 85.25 

 20.85 



97.4 

 70.93 



In 1891 the single eyes gave the largest yield at a distance of 1^ feet; 

 the quarters gave practically the same yield of market size at 1, 1| and 2 

 feet, but when we consider the amount of seed required, those at 2 feet 

 furnish the largest net yield; the halves also show little difference at the 

 distances between 1 and 2^ feet, but the net yield of market tubers would 

 be largest at 2 feet. 



A comparison of these conclusions with the results secured as the aver- 

 age of two years' trial, and with four varieties (Table VI) shows but little 

 difference, and the largest net yield of all was secured from halves, using 

 13.2 bushels of seed per acre at two feet, as shown both in one year's trial 

 (Table IV) and the average for two years (Table V a). 



17 



