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G2™ Fertilizer Disc

Revolutionary Liquid Application System

 229/row John Deere, Kinze, White, Yetter

 249/row John Deere, Kinze, White, Yetter -Notched disc

 69.45/row John Deere 7200/7300 upgrade kit

 87.85/row John Deere 7000/7100 upgrade kit

 247/row Monosem

 267/row Monosem -Notched disc

 40/row G2 dual tube kit

 299/row Dual G2 John Deere cotton closer

Schaffert Mfg. Co. offers a revolutionary method of applying larger quantities of starter or nitrogen fertilizers, 2″-4″ to the side of the row and up to 2″ deep with our G2 fertilizer disc behind the planter.

About the G2

G2 2x2 fertilizer disc shown with Mohawk closing wheels on a John Deere tail section
G2 shown with Mohawk closing wheels

The G2 fertilizer disc is an 8″ or 9″ single disc opener that is mounted on the press wheel brackets of John Deere, Kinze, White, Great Plains, Monosem, and Yetter planters.

For Case IH planters, use in conjunction with the 4 Link Closer or install our stainless steel single or dual side placement fertilizer tubes.

The G2 liquid disc is designed on a walking beam axle with 3 points of contact in the soil at all times. This patented walking beam design gives stability and balanced pressure to both press wheels in closing the seed V.

The G2 places fertilizer behind the planter. It provides even fertilizer depth in uneven terrains.

G2 fertilizer disc with new pivotable bracket and rubber boot installed with the 4 Link Closer and Zipper closing wheels to a White planter
G2 with pivotable FAB bracket along with Zippers and the 4 Link Closer on a White planter

The G2 adds only 11 pounds per row added weight. It is easy to mount and easy to walk around the planter. The compact design eliminates having to find room in front or behind the planter for much larger, heavier, and more expensive fertilizer solutions.

The disc can be set to run 1/2″ to 2″ deep in the soil, and the G2 mounting bracket allows it at least 2″ more clearance under the tail section of the planter.

Right and left hand row units are available.

In a 3-year fertilizer application study (2011-2013) by Ken Ferrie of Farm Journal Magazine the G2 fertilizer disc topped their yield trials. (See charts)

Benefits of the G2

G2 2x2 fertilizer disc with high pressure kit running in the field with Zipper closing wheels on a John Deere planter
G2 running with the high pressure kit and Zipper closing wheels

Close Coupled Design

Planter depth is controlled by the gauge wheels on a planter or drill. Most fertilizer attachments are 30″ to 36″ away from the seed drop thus making it hard to control depth of the planter unit in uneven ground. Our G2 fertilizer disc is placed between the gauge wheel and the press wheel. This makes it less than 12″ from the seed drop, keeping the planting unit running at a constant depth.


  • Unique one piece design that equalizes down pressure on press wheels and liquid disc
  • A heavy duty triple sealed bearing utilized in the disc
  • Powder iron oil impregnated bushings in walking beam
  • Stainless axle in center pivot walking beam = no corrosion
  • No drilling of holes on newer style JD, Kinze, White, Monosem, & Great Plains planters
  • Single disc design for better penetration
  • Adds only 11 lbs per row
  • Easy to install

Eliminates Common Problems

  • New liquid disc is tucked in behind the gauge wheel to keep it from plugging in heavy residue
  • Will not disturb the seed—adjustable 2″-4″ away
  • No need for extra heavy duty down pressure springs

Pivotable Fertilizer Bracket & Rubber Boot

New "FAB" bracket and other updates for 2018

G2 fertilizer disc with new FAB bracket and rubber boot, running in the field through corn stalks with the 4 Link Closer and Mohawk closing wheels on a John Deere planter
G2 with pivotable fertilizer bracket running with Mohawks and the 4 Link Closer

This new pivotable fertilizer bracket replaces the curved fertilizer tube and can be used on existing G2s.

The bracket pivots 40 degrees in and out from center so you can adjust and control where the fertilizer is injected, closer or further away from the disc blade.

The FAB bracket can be used for both low and high pressure. To run high pressure, simply screw in one of our stainless steel high pressure injector orifices into the bottom of the threaded tube. An injector orifice is included with the G2 kit.

We’ve also added a new heavy duty rubber boot to the bottom of the fertilizer tube. This boot is specially made for our fertilizer tubes, designed to immediately snap back into place after hitting trash. It works better than the drag hose previously used. The rubber boot also helps eliminate fertilizer on the row unit.

Pivotable G2 FAB fertilizer bracket with injector orifice and rubber boot
Fertilizer bracket pivots 40° in and out from center to control where the fertilizer is injected

For Low & High Pressure

  • Disc adjustable 2″-4″ from furrow
  • NEW Fertilizer bracket pivots closer or further from disc blade
  • Stainless steel tube injects fertilizer directly into the slice cut by the G2 fertilizer disc
  • High pressure injector orifice threads into tube
  • Adjustable trash deflector
  • NEW Heavy duty rubber boot keeps fertilizer off the row unit

Pivotable G2 FAB fertilizer bracket
Pivotable FAB fertilizer bracket

High Pressure Injector Orifice

Injector orifice (view of both ends)
Orifice end (left) and hex end (right)

 0 for orifice included with G2 kit

 11.80 per additional orifice

Schaffert Mfg.'s new high pressure injector orifice is made to screw into the end of the G2's high pressure kit.

This kit works well with Schaffert's hydraulic and electric-driven pump systems.

Features of the orifice include:

  • Screws inside 3/8″ stainless tube
  • Easy to install with an Allen wrench
  • Orifice OD is 5/16″
  • Stainless steel compact design
  • 10 color coated orifice sizes
  • Injects high pressure, 2-40 GPA
  • Universal models - fits many machines
  • Allows tube to be closer to soil surface, eliminating trash buildup

To find the correct injector orifice for your high pressure kit, you will need to know:

  • Number of rows
  • Row spacing
  • Travel speed
  • Pressure
  • Kind of fertilizer
  • Product weight
  • Gallons per acre

PLEASE NOTE: We normally recommend using only 1 orifice under pressure when running 7-15 lbs of pressure. However, using 2 orifices under pressure can be beneficial because it will help eliminate fertilizer splatter or misting/volatilization of fertilizer when done in the following manner:

  • Use the correct size orifice above for 15-30 psi pressures
  • Use 2-3 times size orifice below, creating 5-7 lbs pressure to stream fertilizer into the soil

 DO NOT run orifices with squeeze pumps. This cannot be done because squeeze pumps do not put out enough pressure for an orifice system. Squeeze pumps only put out 2-3 pounds of pressure.

Dual Side Placement

For dual placement of nitrogen, phosphate, potash, and micro-nutrients when planting cotton, corn, peanuts, or soybeans

Dual side placement of fertilizer is quickly becoming a popular method of increasing yields. Traditionally, side placement of fertilizer has occurred on one side of the furrow. But with our new dual options, farmers can now apply liquid fertilizer on both sides of the furrow.

G2 2x2x2 dual placement with the Chicken Tracker closing wheel on a John Deere cotton closing attachment
Dual G2 with Chicken Tracker on a John Deere cotton closing attachment

Inject fertilizer on both sides of the row with the dual G2 fertilizer disc setup for John Deere planters with a cotton closing attachment (part #BA27006).

Original John Deere row unit with disc cover closing wheel attachment
Original John Deere cotton closing unit (part #BA270006)
G2 2x2x2 dual placement on a John Deere planter with Zipper closing wheels
G2 dual placement with Zippers on a John Deere planter

Or, add another tube to your new or existing G2 fertilizer disc to place liquid on the opposite side of the furrow (shown here on a John Deere planter).

 299 for dual G2 cotton closer kit (above)

 40 for G2 dual fertilizer tube kit

G2 new FAB fertilizer bracket and dual fertilizer tube with Zipper closing wheels on a John Deere planter tail section

Stalk Deflector

G2 stalk deflector pushing away cornstalks in the field

 40/row Stalk deflector

Notched Disc for Heavy Residue

G2 notched Prescription Tillage Disc with FAB fertilizer bracket
9″ G2PTD with G2FAB fertilizer bracket

This notched G2 fertilizer disc works well when planting into wet or dry heavy residue field conditions (such as soybean stubble and heavy corn residue).

The notches in the blade help it "walk" over the residue, keeping the disc rolling in the field instead of plugging or stopping.

This specialized G2 is a true mud hog. In some conditions, using the notched style blade will allow you to eliminate the residue scraper.

 68.45/row G2PTD

G2 Arm Brackets for Kinze & Monosem

New and old arm brackets for Kinze and Monosem tail sections

The redesigned arm bracket allows the back press wheel to run evenly with the front press wheel, keeping constant pressure on both wheels.

With the new arm bracket, farmers will no longer have to cut into the planter's tail section.

Conversion Kits

Updated tail section for John Deere 7000/7100 series planters
Converted tail section for John Deere 7000-7100 series planters

After much demand, Schaffert Mfg. designed a bracket that works like the newer John Deere planters. We now offer G2 fertilizer disc conversion kits for older style John Deere 7000/7100/7200/7300 series planters and Monosem 2001 and newer planters that will allow the G2 to fit them.

Check your tail section to see if it has two holes at the bottom to offset press wheels. If it does not, you will need to order the conversion kit along with the G2.

John Deere 7200/7300 planters will not need new press wheels because they already have the correct bearing for our G2 kit. The only ones that need to have new wheels are the ones with water pump type bearings.

 conversion kits begin at $69.45

G2 Tops Farm Journal Yield Trials

In a 3-year fertilizer application study by Ken Ferrie of Farm Journal Magazine the G2 fertilizer disc topped their yield trials.

2013 Yield by Soil Type Compared with Check

Graph comparing bushel yields using G2, in-furrow, and G2 plus in-furrow

In four of the five soil types, yields increased when starter was applied 2″ to the side of the seed in-furrow, using the G2 fertilizer disc. With the dual placement of fertilizer for the young corn plant, this creates a relay effect as the different fertilizer bands are reached.

Source: Eckelkamp, Margy. "Smooth Hand-Off." Farm Journal Magazine. 25 Jan 2014.

Adding Pop-Up in 2012 Pushed G2 Yields To Top

Graph comparing bushel yields with and without pop-up using G2 and various competitor's attachments

Each of these attachments provides a different placement relative to the seed and mounts differently on the planter. In 2012, there was an above average response to including pop-up fertilizer across two corn-on-soybean fields in central Illinois.

Source: Eckelkamp, Margy. "Starter Test Plot Roundup." Farm Journal Magazine. 26 Jan 2013.

Adding Pop-Up in 2011 Pushed G1, G2 Yields To Top

Graph comparing bushel yields with and without pop-up using G1, G2, and various competitor's attachments

This chart displays the average yield results across two corn-on-corn fields in central Illinois. The farther the starter was placed outside the furrow, the more likely that adding pop-up starter in-furrow would increase yield.

Source: Eckelkamp, Margy. "Strategic Placement" Farm Journal Magazine. 28 Jan 2012.


We have used the G2 2x2 for two years now, and doing so, we are extremely happy with the results. This system allows us to put nutrients close to the seed where it is readily available. This helps establish the plant early and saves money on fertilizers. We highly recommend it.

  T.I., Alabama

I put "Out the Back" fertilizer discs From Schaffert Mfg. on my White 6000 Planter in 2009. We planted corn in wet conditions in southern Indiana and they worked very well. We put down 18 gallons of 32% nitrogen.

A neighbor had a liquid attachment on his JD planter in front of the planter. He had fertilizer and mud all over his planter. My planter stayed clean all season.

I really liked the job the Schaffert Fertilizer Disc did. We will put more fertilizer on this year with the discs.

  C.S., Indiana
  see more 2x2 Fertilizer Disc testimonials  

As a Case IH dealer we have sold several “Out the Back” fertilizer disc systems. Being a dealer you want to offer a good product that works and is cost efficient to the customer. The 2 X 2 system is easy to install by replacing one of the OEM covering discs on Case planters with the fertilizer disc setup.

This system gives the owner some options on how they place the fertilizer. A couple of options would be to stream the fertilizer on with stream tip nozzles or use orifice plates further up the system so that you can stream the fertilizer on by dragging a hose in the slot the disc cuts. Either way we set it up the customers are very satisfied.

A benefit of the “Out the Back” system is that the planter stays clean of fertilizer especially since now they have the orange boot attachment, unlike some other systems which apply fertilizer ahead of the row units. We have enough customers using the 2 X 2 “Out the Back” that it sells itself.

  T.H., Kansas (Dealer)

I have had the "Out the Back" fertilizer disk openers for only a year, but they seem to be working great. I have them on a 7000 JD 16 row so I had to put updated tail sections on; with the new tails on they are very simple to take on and off.

Last year was a wet spring for us and the out the backs discs worked great compared to discs in front of the unit because the gauge wheels never had to run in wet dirt that was turned up from factory openers. I placed the fertilizer 2X2, and ran a rate of 25 gal per acre and didn't have a problem at all.

Schaffert is sending me the deflectors to run beside the disk which should solve the one problem that I had, which was every once and awhile a cob would get stuck between the disk and fertilizer tube and plug it up (which usually only happened in the corn on corn ground).

I would recommend these to anybody placing fertilizer off to the side. They are simple and they work well, but the best thing I like is they keep the fertilizer off the planter.

  R.H., Nebraska

Two years ago we ran one Gen 2 "Out the Back" opener on our 24 row 20 planter. We eliminated the soil build-up on the gauge wheel and also noticed less seedbed disturbance compared to our other fert openers.

This past year we purchased the other 23 Gen 2s. We were concerned that the Gen 2 hose bracket placed starter fertilizer a little farther to the side but after this season's results we are pleased with the way the Gen 2s performed.

  B.H., New York

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