Manufacturing, Inc. www.greatplainsmfg.com Seed, Native Grass, Small Seeds and Fertilizer Rate Charts The following pages are to assist in the proper setting of seeding and fertilizer rates for the 1007NT 10-Foot No-Till Drills. The rates indicated in the charts are approximate values. To assure the most accurate seeding rate it is recommended that the drill be calibrated for the desired seed and fertilizer at the time of planting.
Great Plains Mfg., Inc. Table of Contents Introduction ................................................................ 1 Native Grass Seed Rates ........................................ 20 Drill Models Covered..............................................................1 Document Family ...................................................................1 Material Rates Overview ........................................................1 Calibration Overview ...............................................
Great Plains Mfg., Inc. 1 Introduction This manual is your guide to drill adjustments for achieving specific seed population and fertilizer density targets. Although some setup/adjustment material herein is repeated from the drill Operator’s Manual, you need to be thoroughly familiar with drill operations and adjustments before applying this Seed Rate manual and its table data. Drill Models Covered This manual applies to: 1007NT-1575 (7.
Great Plains Mfg., Inc. 2 Calibration Overview Detailed calibration steps vary with each box. Some general information applies to all boxes. 1 Calibrate with Drill Raised Perform the calibration with the drill hitched and raised. Install cylinder locks. Calibrate for 1/10th Acre or Hectare The number of revolutions per area is: Area Sampled Full Acre 1/10th Acre Full Hectare 1/10th Hectare 2 Wheel Revolutions 491.6 49.2 1214.8 121.
Great Plains Mfg., Inc. 3 Main Seed Box Seed Rate Accurately obtaining the desired seed population requires four steps: 1. Setting Drive Type gearbox (from chart) 2. Setting initial Seed Rate Handle (from chart) 3. Positioning Seed Cup Door (by seed type) 4. Calibration: checking predicted seeding rate Main box seed rate charts begin on page 8. The charts list proper Drive Type and seed-rate-handle settings for various seeds and seeding rates.
Great Plains Mfg., Inc. 4 Set Seed-Rate Handle 2 Refer to Figure 3 The seed rate handle controls the percent engagement of the seed sprocket in each seed cup. 1. Loosen wing nut 1 under handle. 2. Set indicator 2 to a scale reading 10 higher than the value from seed rate chart, then move the handle back to the exact chart value. 1 3. Tighten wing nut. Figure 3 Seed Rate Handle 27473 Position Seed Cup Doors Refer to Figure 4, which depicts the seed cup door handle in position 3 .
Great Plains Mfg., Inc. 5 Reading a Seed Rate Chart 1. Find your seed. Charts are in alphabetical order by seed name. Charts covering more than one seed may be out of order. For Sudan, see Flax. The example presumes you desire to plant: Barley at 60 pounds per acre. If your seed is not listed, find one with similar size, shape and density. Density of the test seed used to develop the chart appears under the right end of the handle scale values. 2.
Great Plains Mfg., Inc. 6 Main Box Seed Rate Calibration Differences will exist between the tested seed and field conditions used to generate the Seed Rate Charts, and your seed and conditions. To accurately achieve your target population, Great Plains recommends calibrating. Perform the calibration with the drill raised. Leave the tractor hitched for movement control. 1. Estimate the sample size. If sampling for 1/10th acre or 1/10th hectare, first divide the area rate by 10.
Great Plains Mfg., Inc. 7 11. Turn crank at approximately 60 rpm until one tenth acre is tallied on acremeter. While turning, check that cups have ample seed coming into them. The number of revolutions per area is: Area Sampled Full Acre 1/10th Acre Full Hectare 1/10th Hectare Crank rotations for one tenth acre: 49.2 60 rpm (1 sec/rev) simulates a 6 mph (10.4 kph) planting speed. Wheel Revolutions 491.6 49.2 1214.8 121.5 12. Weigh metered seed.
Great Plains Mfg., Inc. 8 Main Box Seed Rate Charts U.S customary units. Metric charts begin on page 36.
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Great Plains Mfg., Inc. 20 Native Grass Seed Rates Setting Native Grass Seed Rate The Series II Native Grass Box is for seeding fluffy, native grass blends like Big Blue Stem, Indian Grass, and Side Oats Grama. 4 2 Native Grass seed rate is controlled by a separate (right side) drive system, and is completely independent of rates for Main seed box or Small Seeds. 1 Refer to Figure 6 Native Grass mixes are too variable for seed rate tables to be useful.
Great Plains Mfg., Inc. 21 Native Grass Rate Calibration Before completing these steps, review “Calibration Overview” on page 2. This Native Grass calibration works on any type of native grass no matter what seed type, weight, or density. It also does not require any particular initial drive setup. The drill’s revolutions-per-acre at the native grass cup allows you to calibrate the output in pounds by cup sprocket revolution per acre. To calibrate seed mix: 1.
Great Plains Mfg., Inc. 22 Note: If you are planting a mix similar to mixes planted in the past with this drill, set the Drive Type and final sprocket for the previous mix. 10. Note the current reading of the acremeter, unless you do not plan to rely on it for the calibration. 11. Rotate crank or gauge wheel for one tenth acre or hectare. Area Sampled Full Acre 1/10th Acre Full Hectare 1/10th Hectare Wheel Revolutions 491.6 49.2 1214.8 121.5 12.
Great Plains Mfg., Inc. 23 16. Find this number (or the closest number to this) in the drive setting chart. This gives Drive Type and Native Grass sprocket sizes. If the setting needed is below 42 revs/ac, the Rate Reduction kit is required (see Operation Manual: Options). 17. Set the new Drive Type at the gearbox lever. For example: The closest setting to 69.9 revs/ac is: 67.32 (found in the standard rate table) which is a configuration of: Drive Type: 2 Driven Sprocket: 15T 18.
Great Plains Mfg., Inc. 24 IMPORTANT ! The charts below are not seed rates. These are cup (shaft) revolutions per acre. The currently configured rate is used in the calibration procedure to determine the configuration for your desired field rate. Native Grass Cup Rates The Native Grass attachment includes, as standard equipment, the agitator shown in Figure 9. IMPORTANT ! For Native Grass Mix Only Powdered graphite may be mixed with the native grass seed mix to improve seed flow and metering.
Great Plains Mfg., Inc. 25 Seeding Brome Grass with Native Grass Box The calibration for seeding Brome Grass differs from the native Grass Mix calibration. The chart provides an initial (pre-calibration) value in pounds per acre. To adjust seeding rate: 1. Find the desired pounds per acre on the Brome Grass Rate Chart (page 26). Example FieldRate: You desire to plant at 13.2 pounds per acre. 2. Install the suggested Driven sprocket (page 22).
Great Plains Mfg., Inc. 26 If this figure is different than desired, change your sprockets and drive type accordingly. 14. Divide the desired field rate by the measured rate to obtain a correction factor. FieldRate CorrectionFactor = ---------------------------SampleRate 15. Multiply the desired field rate by the correction factor to obtain an adjusted rate setting to use. AdjustedRate = FieldRate × CorrectionFactor 16. Use the adjusted rate to find a new drive configuration. 17.
Great Plains Mfg., Inc. 27 Small Seeds Rate Setting Small Seeds Rate 2 Seeding rate from this optional attachment is controlled entirely by the seed rate handle on the small seeds box. No Drive Type or sprocket changes are required. Small seeds rate is unaffected by main seed box, Native Grass and fertilizer rate settings. Refer to Figure 10 To set Small Seeds rate, loosen the wing nut 1 at the handle. Move lever 2 position to about 10 higher than the intended rate, then back to that rate. Tighten nut.
Great Plains Mfg., Inc. 28 5. If not already done, set the Small Seeds rate handle. If fertilizer is loaded, remove the fertilizer drive chain or set the fertilizer rate adjuster to zero (unless you are simultaneously calibrating fertilizer rate). 6. Load seed above the rows to be sampled. Load well more than the expected sample size. For example: consulting the chart for Alfalfa at: 12 pounds per acre the closest rate is: 12.1 which is an initial Seed Rate Handle scale setting of: 60 7.
Great Plains Mfg., Inc. 29 18. The Small Seeds rate handle scale is a percentage of meter opening, and its effect is linear near scale center. Calculate a new scale setting based on the test. TargetRate NewScale = PreviousScale × -------------------------------------MeasuredRate 19. Set the Seed Rate Handle to the new scale setting. For example: the target rate was 12 lbs/ac, the initial scale 60, and the measured rate 10.9. NewScale is: 66 = 60 x 12 ÷ 10.9 20.
Great Plains Mfg., Inc. 30 Small Seeds Rate Charts U.S customary units. Metric charts begin on page 48.
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Great Plains Mfg., Inc. 32 Fertilizer Rates Setting Fertilizer Rate The model 1007NT fertilizer meters are driven independently of all seed meter drives, and are unaffected by Drive Type, and Main box/Small Seeds rate settings. Fertilizer rate is adjusted with the Rate Adjuster at the fertilizer box. Fertilizer application rates vary with fertilizer type, density and particle size. Relative humidity and field conditions can also affect application rates.
Great Plains Mfg., Inc. 33 Fertilizer Rate Charts Fertilizer Rate Calibration Differences will exist between the tested fertilizer and field conditions used to generate the Rate Chart, and your fertilizer and conditions. To accurately achieve your target application, Great Plains recommends calibrating. Before completing these steps, review “Calibration Overview” on page 2, and adjust for density (previous page) 6. Estimate the sample sizes, based on 1⁄10th acre or 1⁄ th hectare (the “10” below).
Great Plains Mfg., Inc. 34 Refer to Figure 1 on page 2 5. Remove the calibration crank handle from storage and attach to the main (left) ground drive wheel. 6. Pull the fertilizer hoses off the top of three opener fertilizer tubes, at the top of the openers. Place the hoses into each sample container. 7. If not already done, make any density correction, then using the chart for the target rate, set rate adjuster.
Great Plains Mfg., Inc. 35 16. Divide the desired original field rate by the measured rate to calculate a scale adjustment factor. Multiply that by the previous scale setting to obtain a new scale setting. TargetRate NewScale = PreviousScale × -------------------------------------MeasuredRate 17. Reset the fertilizer rate adjuster based on the settings at the new chart rate. For example: the target rate was 109 lbs/ac and the measured rate was 95, using a scale setting of 60.
Great Plains Mfg., Inc. 36 Appendix Metric Rate Charts, Main Seed Box See page 3 for instructions. Charts in U.S. customary units begin on page 8.
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Great Plains Mfg., Inc. 48 Metric Rate Charts, Small Seeds Box See page 32 for instructions. Charts in U.S. customary units begin on page 30.
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Great Plains Mfg., Inc. 50 Brome Grass Native Grass Metric Rates Metric units. U.S. Customary units chart is on page 26.
Great Plains Mfg., Inc.
EOD Great Plains Manufacturing, Inc. Corporate Office: P.O.
