ROTATION OF CROPS 218 



wise needed for the fifth year; and this crop may 

 be sainfoin. At the end of the series comes another 

 cereal, Oats, for example. The rotation is now com- 

 plete, and the program begins all over again. 



"Crop-rotation is capable of innumerable varia- 

 tions, and the series may be longer or shorter, but 

 there should be the slightest possible departure 

 from the rule that a cereal crop ought always to 

 be preceded by some crop that enriches the soil." 



