RED CLOVER 375 



stations. It is difficult, however, to generalize from them, 

 but lime and barnyard manure both nearly always increase 

 the yield, and phosphatic fertilizers are usually beneficial. 

 The results with potash are negative in about half of the 

 experiments reported. 



Brooks in Massachusetts found no appreciable difference 

 in the effect of potash when applied as muriate and as 

 sulfate. Chemical analysis, however, showed in all 

 cases a higher per cent of " nitrogen-free extract " in the 

 clover fertilized with the sulfate of potash. 



In New Jersey the use of superphosphates with other 

 crops was quite beneficial in increasing the clover crop. 

 Potash also was useful, but barnyard manure gave the 

 best results of all. There was no residual effect from 

 nitrate of soda, and land plaster was without effect. 



At the Cornell Experiment Station pot experiments 

 showed that clover was unable to obtain the phosphorus 

 in ground rock phosphate, but was greatly benefited by 

 acid phosphate, basic slag or bone black. These results 

 agree with those of Kossovich in Russia. 



At the West Virginia Experiment Station phosphatic 

 fertilizers greatly benefited red clover, but potash did not 

 increase the yield. 



In southern Illinois, Hopkins secured an average in- 

 crease of 1.14 tons hay to an acre by the use of 2000 pounds 

 ground limestone and 1200 to 1500 pounds ground rock 

 phosphate. " Accumulating evidence indicates that the 

 increasing frequency of clover failure in the Illinois corn 

 belt is due in many cases to deficiency in phosphorus." 



Mooers at the Tennessee Experiment Station tested 

 various fertilizers on a mixture of orchard-grass and red 

 clover. " At the start all the plots had apparently about 

 an equal stand of cover and of orchard-grass, but on the 



