28 BULLETIN 268, U. S. DEPARTMENT OF AGRICULTURE. 
is to go to too little expense to accomplish a given result. These 
investigations show that the largest net profits have usually been 
obtained from crops raised by cultural methods involving a low cost 
of production rather than from high yields obtained under methods 
involving a high cost of production. Lessening the cost of production 
without proportionally lessening yields should therefore be given 
first consideration. In other words, extensive rather than intensive 
systems of farming should be followed. 
(7) Different types of soil and different combinations of climatic 
conditions require different cultural methods and different combi- 
nations of crops to produce the most profitable results. 
(8) The personality of the farmer and his family; the size, location, 
soil, and environment of the farm; market facilities and prices; the 
available capital, in cash, labor, or equipment, may any or all be 
determining factors in the problem of profitable dry farming in the 
Great Plains area. 
(9) Dry farming in the Great Plains area, in common with all 
farming, to be successful must be systematized, and in order to 
accomplish this, some definite rotation of crops should be established. 
In planning such a rotation, due consideration should be given to all 
the factors here enumerated, as they apply to each particular farm 
and farmer. With these considerations clearly in mind, it is believed 
that no intelligent farmer will experience any great difficulty in adopt- 
ing a system of crop rotation and farm organization that will be better 
adapted to his conditions than any that could be proposed by anyone 
less familiar with these conditions than is the farmer himself. 
WASHINGTON : GOVERNMENT PRINTING OFFICE : 1915 
