A UNIT IN AGRICULTURE 29 



If corn is planted 3 feet 6 inches each way, and when mature is 

 cut and put in shocks, each shock containing corn from an area 14 

 hilis square, how many shocks to the acre? How many, if shocks are 

 Ki hills square? 



The following tables will assist in making accurate estimate cf the 

 amount of land in different fields or plots : 



10 rods x 16 rods = 1 acre. 

 8 rods x 20 rods = 1 acre. 

 5 rods x 32 rods = 1 acre. 



4 rods x 40 rods = 1 acre. 



5 yds. x 968 yds. = 1 acre. 

 10 yds. x 484 yds. = 1 acre. 

 20 yds. x 242 yds. = 1 acre. 

 40 yds. x 121 yds. = 1 acre. 

 80 yds. x 601/2 yds. = 1 acre. 



220 ft. x 198 ft. = 1 acre. 

 440 ft. x 99. ft.= 1 acre. 

 110 ft. x 396 ft. = 1 acre. 



60 ft. x 726 ' ft. = 1 acre. 

 120 ft. x 363 ft. = 1 acre. 

 240 ft. x 181.5 ft. = 1 acre. 

 200 ft. x 108.9 ft. = 1/2 acre. 

 100 ft. x 145.2 ft. = % acre. 



10 square chains = 1 acre. 



160 square rods = 1 acre. 



4,840 square yards = 1 acre. 



43,560 square feet = 1 acre. 



640 square acres = 1 square mile. 



36 square miles (6 miles sq.)=l township. 



Ex. 4. Corn Judging Single Ear. 



A good ear of corn may be described as follows : The ear should 

 be from 9 to 10i/> inches long and from 7 to 7% inches around, meas- 

 ured at a point 1-3 the distance from the butt to the tip. It should 



