332 



ELEMENTS OF FARM PRACTICE 



long? How many rods of fencing arc required to enclose it? (l60 

 square rods in an acre.) 



2. How many acres in a piece of land 16 rods by 10 rods? How 

 many rods of fencing are required to enclose it? 



3. How many acres of land in a field 40 rods square? How 

 many rods of fencing are required to enclose it? How many rods 

 of fencing are required per acre? 



4. How many acres in a field 80 rods square? How many rods 



of fencing are required to enclose it? How many rods of fencing 



per acre? 



A PRACTICAL ROTATION 



Application. — To apply the principles of crop rotation 

 and farm planning to an actual farm, we will study one on 



which a good system of 

 rotation has been prac- 

 ticed for several years. 



The farm we will take 

 is a 160-acre farm, one and 

 a half miles from a good 

 town. The soil is light, 

 sandy loam. The owner 

 specializes in growing po- 

 tatoes and live stock. He 

 is a very careful farmer, 

 a study of whose methods 

 and farm will be valuable. 

 The accompanying 

 chart. Figure 146, shows 



Figure 146.— A 160-acre farm on which a the lay of the farm and 

 three-year rotation has been successfully ^\^q arrangement of the 

 followed for a number of years. r- t i -r.t i i ii> r j.i 



fields. Nearly half of the 

 farm, the back part, is broken up by a river and bluffs 

 so that it is not tillable and can be used only for pasture. 

 The remainder, or 90 acres, is all well drained, reasonably 

 level and easily worked. 



The Rotation. — The 90 acres of tillable land is divided 

 into three 30-acre fields, or rather two 30-acre fields and a 

 10 and a 20-acre field. These two smaller fields are farmed 

 as though they were only one field; so they make the third 

 30-acre field. One field raises grain, one field raises clover 

 and one field raises corn and potatoes each year, but no 

 field grows the same kind of a crop two years in succession. 



