OTHER POINTS ON ROTATION 



339 



of grain, twenty acres of pasture in rotation, four acres of sugar 

 beets', and four acres of cabbage. 



Figure 222 shows the organization of the farm into eight fields 

 of nineteen and twenty acres each, except field VII, which contains 

 sixteen acres. 



The plan of cropping is shown in the accompanying rota- 

 tion chart: 



Rotation Chart for Problem V 



Note the cropping plan on the sand field, on the peat soil and 

 on field VII. Fields VI and IV are the two best fields on which 

 to grow alfalfa. 



Manure is judiciously used. Some commercial fertilizers are 

 used on the sand field. Potash and acid phosphate are applied 

 to the peat soil. Both acid phosphate and rock phosphate are 

 used to reinforce the manure used on the silt loam. 



Rape is sown in the corn on the peat for pasturage and for 

 soil improvement. 



Other Points on Rotation. In cropping hillsides, care should 

 be given to lessen erosion. Such fields should be kept in grass as 

 much as possible. 



In growing alfalfa, it is often convenient to divide a portion of 

 the farm into strips or units and on each strip practice a five-year 



