120 



AGRICULTURE 



Mixing Fertilizers. Many farmers buy materials and mix f ertiL 

 izers according to formulas which tests and experience have proved 



satisfactory. Thus they know the 

 kind and quality of plant food they are 

 getting, and obtain it at a reasonable 

 cost. On page 305 in the Appendix 

 will be found simple and useful sug- 

 gestions about mixing fertilizers. 



ALFALFA 



The alfalfa on the left was from limed land ; that on the right was from an equal area of 

 unlimed land. Legumes are usually benefited by applications of lime. 



SUPfRPMOSPHATE 



Field Tests. By mak- 

 ing field tests, a farmer can 

 learn what fertilizers suit 

 the special needs of his 

 soil and his crops. It is a 

 good plan to set aside for 

 a test eight plots, each 

 twenty-one feet and four 

 inches wide and one hun- 

 dred and two feet long, 

 containing one twentieth 



Tn this diagram the dark lines unite names of mate- 



rials which should never be mixed; the light lines of an acre. They should 



unite those which may be mixed at any time; the T-~ separated bv Strips of 

 double light lines unite those which should be applied . . 



immediately after mixing. land about three feet Wide, 



NITRATE OF SODA 



