These are usually ignored for estimation purposes. The values in Table 2 do not include fuel required for grain drying. Because fuel consumption can vary among tractors, soils, yields, and with other factors, the actual fuel requirement for a particular operation on a given farm may be as much as 50 percent higher or lower than the values listed in the tables. The following section discusses some ways to adjust the table values to represent your situation more realistically. Adjusting the Table Values Soils .
Soil type can affect fuel use and power requirements for tillage operations.
Row width . For 15-inch rows, increase planter fuel by 50 percent. Sweep cultivation in rows other than 30 inches should not affect the fuel estimate as the number of shovels per foot of width is normally the same. Material applied . Nitrogen, bulk phosphorous and potassium, starter fertilizer, water for spraying, chemicals, and seed must all be hauled to the field to be applied.