i6i8 



The Cornell Reading-Courses 



A two-years rotation for a potato farm 



1. Potatoes, harvested in time to sow winter rye 



2. Rye, seeded with red clover to be plowed under for potatoes 



This rotation is practical on land that is in condition to grow red clover. 

 Should the clover fail, a coat of barnyard manure might be substituted. 

 A crop is harvested every year and the field must be plowed every two 

 years. There is some danger that a crop of potatoes every other year 

 may promote the growth of potato diseases in the soil and decrease the 

 profits from the potatoes. A safer rotation would cover three years and 

 be more flexible. 



Fig. 255. — This corn crop was grown on llie same kind of soil and in the same 

 year as the crop shozvn in Fig. 2§j. The previous crop was clover hay. This 

 makes an ideal preparation for corn-growing 



A three-years rotation for a potato and dairy farm 



1. Potatoes 



2. Winter rye or oats, seeded with clovers 



3. Clover hay, followed by manure and a rye cover crop to be plowed 

 under green for potatoes 



This rotation furnishes a cash crop, and feed and bedding for dairy 

 cattle. If the potato harvest is too late for rye to start afterward, oats 

 may be sown early the following spring. A mixture of alsike and red 

 clovers may be used if red clover alone is uncertain. After the first 

 cutting of hay is made the clover sod should be manured and plowed in 

 time for seeding with rye in August, so that the rye will make a good 



