Operating instructions

INSTRUCTIONS TO CALIBRATE FERTILIZER RATES ON HYDRAULIC DRIVE DRILL
#1: Calibrate seed meter using standard calibration procedure.
#2: Calculate ratio of fertilizer rate to seed rate.
Ratio of Rates = Fertilizer rate / Seeding rate
Example: 45 pounds of 11-52-0 per acre / 60 pounds of wheat seed per acre = .75
#3: To obtain the desired fertilizer rate we must change the sprockets which drive the fertilizer meters.
Run a calibration test on the fertilizer rate just like the seed rate is done, except DO NOT change the
CAL number.
#4: Weigh the fertilizer caught and divide by the number of rows caught.
#5: The weight of the fertilizer sample caught should equal the weight of the seed sample size
multiplied by the ratio of rates.
Example: 1 pound wheat seed sample x .75 = .75 pounds
#6: Fertilizer drive sprockets must be changed if the fertilizer sample caught does not equal the desired
rate.
#7: To determine the required sprockets multiply the current sprocket ratio (From Chart) by the desired
fertilizer ratio and divide by current fertilizer sample size.
Example:
Current sprocket ratio: 14-40-14-28-20-17 = .206 (From Chart.)
Fertilizer sample caught = .5 pounds
Desired sample size = .75 pounds
.206 x .75 / .5 = .309
#8: Refer to sprocket ratio chart to determine the sprockets required to achieve the desired fertilizer
rate.
Example:
14-40-21-21-15-17 = .309
(CHART OF RATIOS ON OTHER SIDE)
CrustBuster
DrillMaster Quick Start Guide
346-001150 Pg 31 Revised 11/2010