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TABLE I. List of productive work units l per acre of the various crops 

 and per animal unit for the various classes of live t took, for Che ter 

 County, Pa. The e figures -will vary more or less for different locali- 

 ties. The figures used should be based on average local practice. 



Productive work units per acre of crops: Man. Horse. 



Corn for grain 7 6 



Corn for silage fi. 5 7 



Potatoes 10 9 



Tobacco 20 7 



Wheat, oats, or other grain, oat hay, millet, peas, 



and other forage 2 3 



Hay 1 1 



Alfalfa (two cuttings) 3 3 



Sweet corn ('commercial) 10 9 



Truck (commercial) 24 9 



Truck (home use) 12 4. 5 



Fruit (commercial when sales amount to $25 or 



more per acre) 10 5 



Fruit (home use) 5 1 



Fruit (not bearing) 2. 5 0. 5 



Productive work units per head of live stock: 



Dairy cows 17 2. 5 



Daliy cows (pure bred) 20 2. 5 



20 veal calves 20 1 



10 heifers and calves 30 1 



10 heifers and calves (pure bred) 40 1 



Ibiffl 7 



20 steers (for entire year) 30 1 



10 colts or horses (not worked) 60 1 



100 breeding ewes 50 3 



100 other sheep 40 3 



10 brood sows 3!i 5 



50 other hogs 30 5 



100 hens or other poultry 18 2 



200 chickens or other poultry (raised) 18 2 



i A work unit is an average day's work. 



