182 FARM MANAGEMENT 



cheap, weak horses. If he has good machinery and good 

 horses, he cannot afford to use inefficient men. It re- 

 quires experience and good judgment to keep somewhere 

 near to the proper adjustment of all the factors of pro- 

 duction. No farmer ever keeps all these factors just 

 right. Figure 52 illustrates this point. The profits 

 cannot rise above the limiting factor. Methods should 

 be intensified with uniformity in attention to all the 

 limiting factors. Whenever one point is improved, it is 

 likely to call for improvement in other lines. -In most 

 regions it pays to spray apple trees. But after going to 

 the expense of spraying, one cannot afford to neglect 

 some other point as tillage or pruning. After one has 

 fed his cows more, he needs to be sure that he gives the 

 care that should go with the larger feed. 



REFERENCES 



Principles of Rural Economics, T. N. Carver, pp. 117-202. 

 Cyclopedia of American Agriculture, L. H. Bailey, Vol. IV. pp. 



94-96. 

 Agricultural Economics, H. C. Taylor, pp. 88-116. 



