266 SOILS AND PLANT LIFE 



Crab grass 185 142 



Barnyard grass 62 48 



Morning glory 2 1.6 



Peppergrass 125 100 



Tickle grass 125 100 



Bracted plantain 36 28 



Buckhom 57 46 



Plantain Ill 89 



Black bindweed 11 9 



Pennsylvania smartweed 10 8 



Sheep sorrel 10 8 



Curled dock 36 29 



Russian thistle 65 53 



Yellow foxtail 39 32 



Green foxtail 63 52 



Vervain . . 24 20' 



203. Methods of Culture of Legumes. — Red Clover. — 

 Most of the soils of the Com Belt where red clover has 

 been long and successfully grown contain the bacteria re- 

 quired by it so that inoculation is not often necessary. 

 Aside from this, all the requirements named in Section 195 

 must be most carefully complied with if one would grow 

 this legume successfully. Acidity of the soil, the supply 

 of phosphorus, the methods of seeding and the use of a 

 suitable nurse crop are matters requiring special attention. 



Most of the red clover grown in the United States is 

 mixed with timothy. It is advisable, however, that the 

 clover seed be sown in the spring while the timothy is 

 often sown in the fall. If mixed in this way, about six 

 pounds of clover seed and ten pounds of timothy per acre 

 are used. The growth the first season after the nurse 

 crop is harvested is good — and it is mostly clover. The 

 second year, however, the growth should be heavy with 

 timothy predominating. Two cuttings of hay are usually 



'This table is taken from Dr. L. H. Pammel'a excellent book, "Weeds 

 of the Farm and Garden." It also appears in Iowa Bulletin 115. 



