LEGUMINOUS FORAGE CROPS 



157 



surrounding flower parts, after which the seed is cleaned, re- 

 cleaned and conveyed into bags. 



The huller cylinder and its concaves may be fitted with teeth 

 having a wide-fluted blade, or with steel brads driven into wood 

 through holes in the steel covering, or may be covered with 

 a corrugated steel rasp. The ordinary grain thresher may be 

 used by substi- 

 tuting concaves 

 containing an in- 

 creased number 

 of rows of spe- 

 cial corrugated 

 teeth and by us- 

 ing sieves suited 

 to cleaning the 

 clover seed. The 

 purpose in each 

 case is to get a 

 large amount of 

 rubbing surface 

 in order to re- 

 move the 



Diagrammatic view of portion of clover huller showing 

 hulling cylinder with spikes 



Hardened steel rasp for covering clover hulling cylinder 



seed from its spongy covering. 

 There are at least ten manufacturers of clover hullers in 

 the United States. The size of the hulling cylinder varies from 

 28 to 42 inches in length. Machines are made with and without 

 self-feeders; with web or wind stackers. The smaller sizes 

 may be operated by horse power; the larger sizes are for steam 

 power only. One hundred or more bushels of seed may be 

 hulled in ten hours; 20 to 40 bushels are common. 



167. Value. Red clover is adapted for hay, which has, when 

 well cured, a high feeding value for growing animals, especially 

 sheep, and for milch cows. The nitrogenous character of the 

 food is less needed by mature work animals, and is generally 

 not advised for horses, because of its liability to be dusty. In 



