12 BULLETIN 1202, U. S. DEPARTMENT OF AGRICULTURE. 
TABLE 15.—Disking, sledding, and harrowing per farm and percentage done with tractors. 
. Southern | Western | Northern| Average 
Operation. area. area. area. | all farms. 
Disking unplowed ground: 
Single disk— 
Acres per farm with tractor. ....4..22-.- 2.0.3 (‘) 2 3 2 
Acres per farm with lorses .- 9.2.2 2.c.-- 5 omoccepncese 3 13 47 22 
tal co! > 528 one ae opie ee ee ee ee 3 15 50 | 24 
Percentage done with tractor: <2. 228k ee eee oe a ee eee eee 13 6 8 
Tandem disk— | 
Acres per farm: with tractor. (22-4. 235. Pee sree 22 145 12 56 
eves per farm ‘with Tomses 3 Fe cw ck tere tenes 6 14 0 | 6 
GE eS ce ene ee a ec er 28 159 | 12 6 
Percentage done with tractotscs.2-222 oes esos eae tans eee 79 91 100 90 
Disking plowed ground: | 
Single disk— 
Acres per farm with tracwor. 2225.26 ses sae. coon 15 0 1 | 5 
‘Acres per farm with horses= 320 ese ee eee ee 8 2 5 5 
A a een Sinan a ERLE TIN 8 23 | 2 | 6 10 
Pereentage. done with tractor... 5... 32522 e isch ent beep ose ee GON Ss eks: ole soe 50 
Tandem disk— | 
Acres per farm with tract0l.2..< <2: -2-2s--se eee se = 82 | 3 | 3 30 
Acres per farm with horses.:. «2... <2. 2 egepuaces <a ape 4 | 0 (1) 1 
MOtal. s.625 33 oF 282 ose ce ee ee 86 3 3 | 31 
Percentage done with tractor... .. 25. San cee eee eee ow nana tes ee Ub eee mer Oe ake gee o 97 
Sledding: | | 
Keres per farm-with tractor... eee ace er sono oe 18 | 3 | 0 7 
Acres per farm with horses <. 25-2. 2. jsapeee ote ses cue eee ee 46 | 1 0 16 
Otal...- 25< Pes. pe ae eee ee ees ta ee 64 4 | 0 23 
Percentage done with tracior.... 22 f- pepe es sceuae een aes ok SE py en SEER Re. 30 
Harrowing: : | 
Acres per farm: with tractor... 7 -aas6 tec soon eases ee 149 3 32 63 
A cres per farm with Borses. -.5--2. Pee ene eee ene en 70 24 123 | 75 
Toba) sts 5 Soest kee te ee ee eee eee 219 27 | 155 138 
Percentage done ‘with tractor..222222~- Se bese eee 68 ll | 21 46 
1 Less than 0.5 ofan acre. 2 
Fitting ground other than plouing.—Table 15 shows, the number 
of acres disked, harrowed, and sledded per farm during the year and 
the percentage of each operation done with tractors. The acreages 
for disking and harrowing have been computed on the basis of once 
over the ground. That is, if a farmer disked or harrowed an 80-acre 
field twice it has been considered as 160 acres. 
Sledding is an operation performed only after listing and conse- 
quently was not common except in the southern area. It is a com- 
paratively light operation and on farms where listing and sledding 
were carried on simultaneously tractors were ordinarily used for 
listing and horses for sledding. 
Disking is separated into work done on plowed and unplowed 
ground and into that done with single and double disks. Disking 
plowed ground was not practiced to any extent except in the southern 
area and most of it there was done with a tandem disk and tractor. 
Disking unplowed ground was carried on most extensively in the 
western area and there also most of the work was done with the 
tandem disk and tractor. In the northern area the single disk was 
used more extensively than the tandem disk, and it was usually 
drawn by horses. 
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