FOOD FOR PLANTS 211 



each way encloses 4,900 square yards, this area ex- 

 ceeds one acre by 60 square yards. 



To determine an accurate acre it may be measured 

 70 yards in length by 69 ^/^ yards in width. The same 

 result will be obtained by measuring 220 feet in 

 length and 198 feet in width, or by measuring 73^/4 

 yards in length by 66 yards in width. 



Laying Out Plots. 



In laying out an acre in the manner described 

 above, the sides of the area would be of equal, or 

 approximately equal length. 



If the length or width of any field or plot be known, 

 the required width or length to enclose an acre may 

 be ascertained simply by dividing the known distance 

 in yards or feet into the number of square yards 

 (4,840) or square feet (43,560) contained in one acre. 



A forty-rod field is 220 yards, or 660 feet, in length. 



Dividing 4,840 by 220, we obtain 22, the width 

 in yards required to give one acre. Therefore, 20 

 rods (110 yards) by 22 yards would represent half 

 an acre; 10 rods (55 yards) by 22 yards, one-quarter 

 acre, and so on. 



A Planter's Guide. 



Showing the number of plants required to plant one acre 



