APPLICATION AND ILLUSTRATIONS 



333 



Corn yields at the rate of ten to eleven tons of silage per acre, 

 or fifty to sixty bushels of corn; oats average about forty bushels, 

 and clover about one and three-quarters ton per acre. 



to meet the feeding requirements, at least twenty acres of 



a 



Orchard 

 Garden 



Fio. 216. Cropping plans the second year after planning. 



each crop must be grown. Fifty-eight acres are now under cultiva- 

 tion. Figure 215 shows the arrangement of the farm when rota- 

 tion was first considered. 



The important soil problems are (a) a lack of available phos- 

 phorus, and (6) a comparatively low supply of nitrogen and 

 organic matter. 



In order to work towards a fixed rotation without disturbing 



