92 FARM AND SCHOOL PROBLEMS. 



pounds of nitrogen in the roots and stubble, and for every ton of 

 thoroughly dried soy bean hay removed from the field there re- 

 mains in the roots and stubble six pounds of nitrogen. 



One of the chief values of the soy bean crop therefore is to 

 supplement the clover crop when the latter is not a decided 

 success. 



Soy beans used with corn for ensilage constitute a well-bal- 

 anced ration if they are put in the silo at about the proportion 

 of one part soy beans to two or three parts corn. If the propor- 

 tion of soy beans is too great when fed to dairy cattle, they may 

 impart disagreeable taste to milk and butter. 



For the best quality of hay they should be drilled solid using 

 six or eight pecks of seed per acre. 



When sown for the purpose of harvesting for seed, the best 

 yield in Ohio has been from beans drilled in rows twenty-eight 

 inches apart, using three pecks of seed per acre. 



With a ten hoe drill the feed cups can be stopped up so that 

 four rows twenty-one inches apart, or three rows twenty-eight 

 inches apart, or two rows forty-two inches apart can be drilled 

 at one time. 



If a ten-hoe drill is used and the rows are drilled twenty- 

 eight inches apart, three rows will make a strip seven feet wide. 



Taking 1/5 of an acre or 8,710 sq. ft. and dividing by 7 the 

 quotient is 1,2442/7 feet which is the distance a drill must go 

 in drilling 1/5 acre. Divide 1,2442/7 by the circumference of 

 the drill wheel and the quotient will be the number of revolutions 

 of the wheel made in drilling 1/5 of an acre. 



Raise the drill and turn the wheel by hand the required num- 

 ber of times or revolutions for seeding 1/5 acre catching the soy 

 beans on a canvass spread under the drill. From the amount 

 thrown out by the drill it can be determined how to regulate the 

 drill to sow the required amount per acre. 



Value of Soybeans Compared with other Crops. 



In nutritive value soy beans rank ahead of red clover and are 

 nearly equal to alfalfa. Make a study of the Henry tables and 

 compare nutritive value of alfalfa, red clover and soy beans. 



Soy beans should be seeded after danger of frost is past; 



