The Mechanism of Cycles 



97 



r 



r 



-+ -4 +IS +36 *Sf -II -I *f +19 *ff 



Percenfsdt chande in the yie/d per acre of corn. Percentage chande in the yield per acre of hay. 



;,+ -to 



\ 



-to 



-S -6 +1+ +3-4- -4f -S +3S +7S 



Percer>fyde change in the yield per acre of oafs. Percentage change in the yield per acre 



FIGURE 21. The relation between the price and the yield per acre of the 



several crops. 



When the origin is at (0, 0), the equations are 

 For corn, y = .17 1.2989* + .01892x2 .000137z 3 . 

 For hay, y = 1.17 1.0215z + .01549o;2 + .00009x 3 . 

 For oats, y = 1.49 1.1346x + .02324x2 .000238x 3 . 

 For potatoes, y = .49 1.4863x + .01993x2 .000141x 3 . 



