155 



Yield per acre of oats grown immediatehj after stuhhle 

 or vines of coicpeas^ velvet heans, etc. 



o 

 o 



Yield per acre. 



Grain. I Straw. 



IjOats after velvet bean vines 



6 1 Oats after velvet bean stubble 



Average after velvet bean vines and stubble 



4 Oats after ccwpea vines 



3 Oats after cowpea stubble 



Average after cowpea vines and stubble. ... 

 2 Oats after crab grass and weeds 



5 Oats after German millet 



Average, after non-leguminous plants 



Lbs. 



1206 



1672 



1439 



1463 



2013 



1738 



231 



361 



296 



From early spring there was a marked difference in 

 the appearance of the several plots, the plants being 

 much greener and taller where either the stubble or 

 vines of cowpeas had been plowed under. 



When the oats began to tiller, or branch, the differ- 

 ence increased, the plants supplied with nitrogen, 

 through the decay of the stubble or ^ines of cowpeas 

 and velvet beans, tillering freely and growing much 

 taller than the plants following German millet or crab 

 grass. The difference in the height and thickness of 

 the oats on some of the plots is shown in figures 1 and 2. 



May 18, 1898, oats on all plots were cut. 



In this experiment the average yield of oats was 33.6 

 bushels after velvet beans, 31.6 bushels after cowpeas, 

 and only 8.4 bushels after non-leguminous plants (crab 

 grass, weeds and German millet.) 



Here is a gain of 24.2 bushels of oats and nearly 

 three-fourths of a ton of straw as a result of growing 

 leguminous or soil-improving plants, instead of non- 

 leguminous plants, during the preceding season. 



