10 BULLETIN 735, U. S. DEPARTMENT OF AGRICULTURE. 
or $338,510, should be charged to the 1915 crop of sugar beets. It thus 
appears that the total charge against future crops is greater than 
the amount that is accumulated in the soil from previous years. If 
the entire amount of manure used had been spread upon all the 
sugar-beet land devoted to the 1915 crop, the average per acre 
would have been 5.6 tons; but some growers spread as high as 25 
tons per acre, and the average of 15.3 tons was spread on each acre 
manured, thus leaving 4,599 acres of land with no manure to benefit 
the 1915 crop of beets. | 
The growers on 72 farms did not manure any of the land they put 
in beets, 62 growers manured less than 25 per cent of their beet area, 
116 used manure for approximately 50 per cent of their beet area, 
and 55 manured 75 per cent or more of all the land they put in 
beets. The lands that were manured as a whole produced a good in- 
crease in the yield, and, after deducting the value of the manure at 85 
eents per ton and the cost of the labor of spreading it, a net profit of 
$1.41 per acre, due to manuring, 1s shown for the entire area. (Table 
1506) 
TasBLeE III.—Use of manure as affecting yields of sugar beets in the Billings 
region. 
[The valuation of beets is that given by the growers. ] 
Percentage of area devoted to 
beets upon which manure 
E . Not was used. 
Classification. Spare. All farms. 
1 to 24%. | 25 to 743. | 75 to 100. 
iNreadevotedutomeetSsa4- 526-8 43ers acres... 1,908 2,055 3, 443 1, 443 8, 849 
IBS OMOGNKRO LE ecoosesassacsebaccocandascauc tons..| 18,835 20, 328 38, 183 17, 855 95, 201 
IPTOCUCTION PeMaCle soa cee ee eee eee eee OOsc8e 9. 87 9. 89 11.09 12.37 10. 76 
Waltieronbectscold tk on te tun Cn ra eal $110,742 | $124,006 | $228,022 | $107,211 | $569, 981 - 
Malhieotibectsspemacrels casas yas hae sie Suse cee | 58. 04 60. 37 66. 24 74. 29 64. 45 
Value of increase of crop per acre.-.---...------------ leita ares 2.33 8. 20 16. 25 6. 41 
In considering the value of the increased yield per acre, the quality 
of the beets as well as the added tonnage should be considered. 
In the comparison of those farms using no manure with those 
spreading manure on 75 per cent or more of their sugar-beet land, 
it was found that the estimate of 85 cents per ton for the value of 
manure in the yard was less than the actual value of the manure, 
for on this one crop the farmer received an average of $1 per ton 
for manure by increased crop production after deducting for all labor 
costs of spreading manure at the usual rates. (Table IV.) This 
shows that manure has a value, and the beet grower can not afford 
to let it waste. 
j 
