Posted on

isolate weed seed exiting

Eliminating weed seeds before they can establish new plants is a practical and effective means of weed control in crop farming in certain parts of the world. At grain harvest, removing the weed seed often becomes a missed opportunity, and a tremendous amount of weed seeds are left on the field. Harvesting weed seeds can prevent them from becoming part of the soil seed bank.

A study featured in the journal Weed Technology tested the seed retention of four dominant weed species plaguing Australian crop production. A high seed retention rate (with low early shatter rates) shows potential for the use of harvest weed seed systems to reduce the amount of seed from being reintroduced into the field.

A study featured in the journal Weed Technology tested the seed retention of four dominant weed species plaguing Australian crop production. A high seed retention rate (with low early shatter rates) shows potential for the use of harvest weed seedsystems to reduce the amount of seed from being reintroduced into the field.

Although the nine sites were widely dispersed and experienced varying climatic conditions, the weed seed dispersion patterns were similar. At wheat crop maturity, the average proportions of seed production retained for the weeds were: 85% of ryegrass, 99% of wild radish, 77% of brome grass, and 84% of wild oat. Additionally, this high seed retention persisted throughout the 28-day harvest period for ryegrass and wild radish.

To assess the seed retention and thus establishing the probability of harvesting success, researchers collected annual ryegrass, wild radish, brome grass, and wild oat plants from nine wheat fields in Western Australia at the time of wheat harvest. Plants were cut at 15 cm (approximately 6 inches) above the ground level and bagged. Plants and seeds were collected at the beginning of the wheat harvest and every 7 days thereafter for 28 days.

Under normal harvesting conditions, seeds from the weed species enter the harvester, are separated from the grain, then exit the harvester as chaff. The harvester spreads the residue and weed seeds evenly across the field, helping to expand the weed problem.

The study tested the seed retention of four dominant weed species plaguing Australian crop production. A high seed retention rate shows potential for the use of harvest weed seed systems to reduce the amount of seed from being reintroduced into the field.

The high proportions of seed retained by the species in this study indicate that harvest weed seed control systems would be effective in Australian crops.

Australian study examines harvest weed control systems that isolate weed seed in chaff

The study recommends further research in the United States to determine if these practices have applicability to control problem weed populations.

Under normal harvesting conditions, seeds from the weed species enter the harvester, are separated from the grain, then exit the harvester as chaff. The harvester spreads the residue and weed seeds evenly across the field, helping to expand the weed problem.

6 Seed Terminator 2 0 The Seed Terminator 3 0 Troubleshooting Seed Terminator 2 0 Questions around operation 3 0 Questions around troubleshooting 1 WHAT IF I KNOWI WILL BE 2 HOWDOES MY HARVESTER STARTINGHARVEST INTOUGH ENGINE SPEEDAFFECT THE CONDITIONS SEEDTERMINATOR 1 WHY IS THE SEEDTERMINATOR LOSINGMILL SPEED Multiple options can be considered when you are entering unfavourable conditions Crop preparation is important when considering Harvest Weed Seed Control When harvesting legumes desiccation and timing are critical Desiccation dramatically improved by double knocking before harvest will reduce the moisture in the plant and make it easier to process the chaff through the terminator Seed Terminator s High Capacity Mills are designed for green material and are a reduced power option that kills 82 90 of weed seeds depending on the moisture levels They will assist in harvesting when there are high levels of green material being processed through the Seed Terminator 3 HOWDOES CUTTER BAR HEIGHT AFFECT GROUND SPEED The cutter bar s height significantly impacts the volume of material being processed through the harvester More volume into the combine harvester means more straw to process through the feeder housing and separator therefore more residue out the back This will lower the harvesting capacity as processing more straw requires more power Dropping the cutter bar to capture more weeds will reduce the harvester capacity and therefore ground speed Due to being directly driven off the combine harvester engine and the mill speeds being geared up to spin faster losing engine revs will result in losing a higher level of Seed Terminator mill revs While the Seed Terminator will maintain a 99 kill down to 2500 rpm dropping engine revs means the harvester is operating at maximum engine load Even though the Seed Terminator may sound an alarm for low mill speed this does not mean you are overloading the mills rather the harvester is at maximum capacity 4 WILL THE SEED TERMINATOR CREATE MORE DUST You can t kill weed seeds without making a little dust The Seed Terminator is a multi stage hammer mill designed to process weed seeds and chaff When the material is broken down through each stage of the mill it exits at a high velocity spreading across the paddock Chaff can be deflected down to help suppress the dust but it will limit the spread 7 The monitoring system will alarm you when one or both of the mill speeds slows down and depending on the alarm it will determine where to isolate the alarm source DRIVE COMPONENT ALARM Is there a loss of rpm Harvester may not alarm for low engine or chopper rpm SEEDTERMINATOR LHMILL Yes No Yes Yes Yes SEEDTERMINATOR RHMILL No Yes Yes Yes Yes CHOPPER RPM No No No Yes Yes ENGINE RPM No No No No Yes RESULT Inspect the Left Mill Drive components Inspect the Right Mill Drive components Check drive components on the side of the harvester from the jackshaft down to the Seed Terminator Gearbox Check drive components on the side of the harvester from the engine drive pulley down to the jackshaft Engine capacity has reached its limit Note Worn components will limit the ability to drive the mill Any restrictions on the tension arm and the rods ability to move freely will restrict the belt s tension limiting the mill drive capacity

6 Seed Terminator 2 0 The Seed Terminator 3 0 Troubleshooting Seed Terminator 2 0 Questions around operation 3 0 Questions around troubleshooting 1 WHAT IF I KNOWI WILL BE 2 HOWDOES MY HARVESTER STARTINGHARVEST INTOUGH ENGINE SPEEDAFFECT THE CONDITIONS SEEDTERMINATOR 1 WHY IS THE SEEDTERMINATOR LOSINGMILL SPEED Multiple options can be considered when you are entering unfavourable conditions Crop preparation is important when considering Harvest Weed Seed Control When harvesting legumes desiccation and timing are critical Desiccation dramatically improved by double knocking before harvest will reduce the moisture in the plant and make it easier to process the chaff through the terminator Seed Terminator s High Capacity Mills are designed for green material and are a reduced power option that kills 82 90 of weed seeds depending on the moisture levels They will assist in harvesting when there are high levels of green material being processed through the Seed Terminator 3 HOWDOES CUTTER BAR HEIGHT AFFECT GROUND SPEED The cutter bar s height significantly impacts the volume of material being processed through the harvester More volume into the combine harvester means more straw to process through the feeder housing and separator therefore more residue out the back This will lower the harvesting capacity as processing more straw requires more power Dropping the cutter bar to capture more weeds will reduce the harvester capacity and therefore ground speed Due to being directly driven off the combine harvester engine and the mill speeds being geared up to spin faster losing engine revs will result in losing a higher level of Seed Terminator mill revs While the Seed Terminator will maintain a 99 kill down to 2500 rpm dropping engine revs means the harvester is operating at maximum engine load Even though the Seed Terminator may sound an alarm for low mill speed this does not mean you are overloading the mills rather the harvester is at maximum capacity 4 WILL THE SEED TERMINATOR CREATE MORE DUST You can t kill weed seeds without making a little dust The Seed Terminator is a multi stage hammer mill designed to process weed seeds and chaff When the material is broken down through each stage of the mill it exits at a high velocity spreading across the paddock Chaff can be deflected down to help suppress the dust but it will limit the spread 7 The monitoring system will alarm you when one or both of the mill speeds slows down and depending on the alarm it will determine where to isolate the alarm source DRIVE COMPONENT ALARM Is there a loss of rpm Harvester may not alarm for low engine or chopper rpm SEEDTERMINATOR LHMILL Yes No Yes Yes Yes SEEDTERMINATOR RHMILL No Yes Yes Yes Yes CHOPPER RPM No No No Yes Yes ENGINE RPM No No No No Yes RESULT Inspect the Left Mill Drive components Inspect the Right Mill Drive components Check drive components on the side of the harvester from the jackshaft down to the Seed Terminator Gearbox Check drive components on the side of the harvester from the engine drive pulley down to the jackshaft Engine capacity has reached its limit Note Worn components will limit the ability to drive the mill Any restrictions on the tension arm and the rods ability to move freely will restrict the belt s tension limiting the mill drive capacity

4 Seed Terminator 1 0 Startup 1 0 Startup Seed Terminator 5 1 0 Questions around startup 1 WHAT TOEXPECT WHEN YOUFIRST RUNYOUR SEED TERMINATOR The Seed Terminator in cab monitoring system will power on when you start up the harvester to display mill speeds temperatures and vibration information When you first engage the separator the engine will momentarily reduce speed more than previously experienced without a Seed Terminator This reduction in engine speed will occur due to the Seed Terminator requiring additional power to reach operational speed quickly The Seed Terminator will be loud and hearing protection should be worn once at operating speed As you begin to harvest the chaff being processed will start to muffle the Seed Terminator noise and it will partially decrease It is essential to monitor both the engine and Seed Terminator speeds as together they paint a picture of how the harvester and Seed Terminator are loading up The Seed Terminator is designed to process the residue from the cleaning shoe which contains chaff volunteer grain and weed seeds The provided separation baffle ensures the Seed Terminator processes this material to kill 99 of the weed seeds whilst the straw is still processed through your harvester s residue management system TIP Harvester set up is essential ensuring the straw stays in the rotor and goes out through the chopper will prevent the Seed Terminator from wasting power processing straw 2 WHAT SERVICE IS REQUIRED Every 50 hrs a service reminder will pop up on the monitoring system prompting you to i
nspect and service your machine For instructions on how to do this please refer to the Service Manual a Belt Tension At startup it is important to be familiar with the tensioning system for the belts both underneath the machine and on the side drive The belts will bed in and settle into the pulleys over the first couple of days It is important to check the belt tensions multiple times during the first day and we recommend checking them every morning before harvest begins 3 WHAT DOES THE MONITORINGSYSTEM TELL ME 4 HOWDOHARVEST CONDITIONS AFFECT THE SEED TERMINATOR The Seed Terminator s advanced monitoring system provides you with real time feedback about critical aspects of the machine It includes both left and right mill speeds spindle temperature sensors on each mill gearbox oil temperature and a vibration sensor that monitors bearing conditions Harvesting early in the season typically presents tough conditions while the grain might be ripe there are often high moisture levels still in the plant and sometimes even green plants These conditions use more power through the harvester and therefore use more power through the Seed Terminator As crops continue to dry and ripen conditions will get easier b Tension Arm Grease Points Each tensioner arm pivot has a single grease nipple that requires greasing every 50 hours c Gearbox Oil There is a 50 hour oil change for the first service on the gearbox plus the sight glass for oil level and clarity should be done regularly and continued on an annual basis d Daily Clean Out As part of daily maintenance ensure the Seed Terminator is blown down and is clean of any dust chaff or straw that may build up on the harvester e Clean Magnet Tray The Magnet Tray is attached to the rear of the sieve and designed to catch any ferrous objects before they enter the mill This should be checked and regularly cleaned off including foreign objects that it may have been caught should be removed

Page 7

The Seed Terminator is a simple attachment to the combine harvester that terminates seeds before they become weeds 1 2 3 4 5 i Contents Seed Terminator 3 QUESTIONS AROUNDSTARTUP What to expect when you first run your Seed Terminator 04 What service is required 04 What does the monitoring system tell me 05 How do harvest conditions affect the Seed Terminator 05 QUESTIONS AROUNDOPERATION What if I know I will be starting harvest in tough conditions 06 How does my harvester engine speed affect the 06 Seed Terminator How does cutter bar height affect ground speed 06 Will the Seed Terminator create more dust 06 QUESTIONS AROUNDTROUBLESHOOTING Why is the Seed Terminator losing mill speed 07 Why has my Vibration Alarm gone off 08 How do I turn off the Service Alarm 08 Can I turn off my alarms 08 How do I know if the Chaff Blockage Alarms are 08 calibrated correctly QUESTIONS AROUNDWEAR What will wear on the Seed Terminator 09 What crops will wear out the mills the most 09 How long does it take to replace work components 09 Will worn mills still have an effective kill rate 09 QUESTIONS AROUNDTYPES OF CROP How do I maximise capacity in cereals 10 Can I use the Seed Terminator in legumes 10 Will frosted crops slow me down 10

10 Seed Terminator 5 0 Types of Crops Seed Terminator 11 3 WILL FROSTEDCROPS SLOW ME DOWN F Timing is critical when harvesting legumes Desiccation is essential to minimise the plant moisture while harvesting Harvesting legumes that have completely dried out can lead to high shoe loads due to how easily straw breaks up and falls through the separator Due to all of the residue being processed through the Seed Terminator this can have an impact on the harvester capacity O Maximising capacity in cereals revolves around minimising the Material Other than Grain MOG on the cleaning shoe The more MOG on the shoe the more power required to process the residue that goes through the Seed Terminator Australian conditions are typically dry and it is easy to damage the straw as the crop moves through the harvester Maintaining the straw quality will reduce the chance of straw ending up on the cleaning shoe and creating inefficiencies in the harvester performance D 2 CANI USE THE SEED TERMINATOR INLEGUMES EN 1 HOWDOI MAXIMISE CAPACITY INCEREALS FA Q 5 0 Questions around types of crop Frosted crops are difficult to process through the harvester and the residue through the Seed Terminator is no different

8 Seed Terminator 3 0 Troubleshooting 2 WHAT TYPES OF ALARMS DOES THE MONITORING SYSTEMS HAVE The monitoring system has two chaff blockage monitors one on each of the inlet chutes They provide a warning or alarm if material begins to bridge over the mill opening The monitor alarms typically occur in tough conditions e g frosted crops and in some instances where there are high levels of straw going through the mill The calibration of these sensors can be adjusted if they are sending too many false alarms Please see the Chaff Blockage Sensor Calibration Procedure located in the operators manual for further information 4 HOWDOI TURNOFF THE SERVICE ALARM The service alarm will automatically remind you every 50 hours to check the service points on your machine You can dismiss the alarm from the maintenance page on the monitor menu for instructions on how to do this please refer to the Operators Manual 6 HOWDOI KNOWIF THE CHAFF BLOCKAGE ALARMS ARE CALIBRATEDCORRECTLY The chaff blockage alarms will warn of any restrictions to chaff flow entering the mills The sensitivity can be adjusted to minimise the chance of a false alarm If there is no material being processed and spread through the Seed Terminator and there is no mill speed loss there is a blockage at the inlet chute If there is any loss of chaff volume exiting the Seed Terminator this may be caused by a blockage If there is no volume loss through the Seed Terminator and the chaff blockage alarm is sounding it may indicate a false alarm 3 WHY HAS MY VIBRATION ALARMGONE OFF The vibration alarm may sometimes be triggered while driving across rough terrain or against the direction of rows of the sown crop To ensure the drive components are in good condition pull up to a complete stop and run the mill at high idle Scroll right to the vibration page and it will tell you the actual average and maximum vibration The actual vibration should be below 15 mm s Please follow the Vibration Diagnosis Procedure if the alarm persists 5 CANI TURNOFF MY ALARMS The alarm setpoints are optimised from the factory to give you adequate notice before any failure and should not require any adjustments The temperature and vibration settings will warn you of a bearing that needs to be replaced The mill speeds will warn you to slow down before you damage any of the belts and the chaff blockage alarms will warn you of any blockages preventing chaff from entering the mill 4 0 Wear Seed Terminator 9 4 0 Questions around wear 1 WHAT WILL WEAR ONTHE SEEDTERMINATOR 2 WHAT CROPS WILL WEAR OUT THE MILLS MOST The Seed Terminator has three wearing components that process the weed seeds screens rotors and flails As a rule of thumb we benchmark the screens to last at least 500 hours rotors and flails to last at least 1000 hours this benchmark is based on the assumption that program is legumes This will vary depending on soil conditions what rate that seeder points wear out will indicate your soil s abrasiveness Legumes typically have a higher wear rate than cereals due to the amount of soil and sand that can go through the harvester when harvesting low to the ground How much extra wear you will see in legumes will be dependent on the abrasiveness of the soil Cereal crops low to the ground can also pick up more sand and dirt Canola typically has low wear rates compared to cereals For example a cereal and legume rotation program will have a higher wear rate than a program containing a cereal and canola rotation 3 HOWLONGDOES IT TAKE TOREPLACE WORN COMPONENTS Screens 20 mins Flails 20 mins 25 mins 45 mins Rotors 45 mins 30 mins 75 mins Timing includes the removal and installation of the screens Full instructions are on the Operators Manual 4 WILL WORNMILLS STILL HAVE ANEFFECTIVE KILL RATE Yes even when the mills are almost fully worn the Seed Terminator will still kill 99 of weed seed There will be no loss in effective kill rate until holes begin to wear out in the outer stage of the screen Please refer to the Wear Guide in the Operators Manual for further information

4 Seed Terminator 1 0 Startup 1 0 Startup Seed Terminator 5 1 0 Questions around startup 1 WHAT TOEXPECT WHEN YOUFIRST RUNYOUR SEED TERMINATOR The Seed Terminator in cab monitoring system will power on when you start up the harvester to display mill speeds temperatures and vibration information When you first engage the separator the engine will momentarily reduce speed more than previously experienced without a Seed Terminator This reduction in engine speed will occur due to the Seed Terminator requiring additional power to reach operational speed quickly The Seed Terminator will be loud and hearing protection should be worn once at operating speed As you begin to harvest the chaff being processed will start to muffle the Seed Terminator noise and it will partially decrease It is essential to monitor both the engine and Seed Terminator speeds as together they paint a picture of how the harvester and Seed Terminator are loading up The Seed Terminator is designed to process the residue from the cleaning shoe which contains chaff volunteer grain and weed seeds The provided separation baffle ensures the Seed Terminator processes this material to kill 99 of the weed seeds whilst the straw is still processed through your harvester s residue management system TIP Harvester set up is essential ensuring the straw stays in the rotor and goes out through the chopper will prevent the Seed Terminator from wasting power processing straw 2 WHAT SERVICE IS REQUIRED Every 50 hrs a service reminder will pop up on the monitoring system prompting you to inspect and service your machine For instructions on how to do this please refer to the Service Manual a Belt Tension
At startup it is important to be familiar with the tensioning system for the belts both underneath the machine and on the side drive The belts will bed in and settle into the pulleys over the first couple of days It is important to check the belt tensions multiple times during the first day and we recommend checking them every morning before harvest begins 3 WHAT DOES THE MONITORINGSYSTEM TELL ME 4 HOWDOHARVEST CONDITIONS AFFECT THE SEED TERMINATOR The Seed Terminator s advanced monitoring system provides you with real time feedback about critical aspects of the machine It includes both left and right mill speeds spindle temperature sensors on each mill gearbox oil temperature and a vibration sensor that monitors bearing conditions Harvesting early in the season typically presents tough conditions while the grain might be ripe there are often high moisture levels still in the plant and sometimes even green plants These conditions use more power through the harvester and therefore use more power through the Seed Terminator As crops continue to dry and ripen conditions will get easier b Tension Arm Grease Points Each tensioner arm pivot has a single grease nipple that requires greasing every 50 hours c Gearbox Oil There is a 50 hour oil change for the first service on the gearbox plus the sight glass for oil level and clarity should be done regularly and continued on an annual basis d Daily Clean Out As part of daily maintenance ensure the Seed Terminator is blown down and is clean of any dust chaff or straw that may build up on the harvester e Clean Magnet Tray The Magnet Tray is attached to the rear of the sieve and designed to catch any ferrous objects before they enter the mill This should be checked and regularly cleaned off including foreign objects that it may have been caught should be removed