Destoning

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Destoning. 2022.

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You will be working in an extremely high-risk area, always remember …. Never get off a moving or running vehicle/machine High Visibility clothing must be worn at all times Follow vehicle movement flows Do not climb on top of machinery or trailers ALL Guards are closed/on and in good working order.

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Why do we Destone?. To enable us to harvest vegetables without the interference of stones – Harvesters can not distinguish between crop and stone To create a soft even seed bed for the seed/tubers to grow at their full potential To create a French drain system in the wheeling’s that allows water to drain with ease To create a hard wheeling to enable us to drive through during the season and harvest.

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Is it important?. The answer is Yes Probably the single most important operation with the biggest detriment to crop sales Why? Because once it is done there is nothing we can do about it Water we can re issue and apply more Chemicals we can re apply or apply more Planting and drilling - crops will normally grow in most conditions all be it with less yield All operations we do are very important but Destoning is the base to all good crops.

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Scanstone destoner thoresby. What is the aim?. The aim is to remove the selected grade of the stones and clod of a set size from the given depth within a bed and put it into a wheeling which has not had stones or clod put in already.

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How do we do it?. Setting the machine up in the correct way Remember all the points in our safe working procedures! And keep an eye out for others Before you enter the field, do you know: Where are the risks? Hydrants, Pylons, ditches, fences, in field trees. Where you are heading? Are there already people in the field destoning? – where is the ideal place to set up so you do not hold others up? Are you waiting for the ridger to pull beds out? – Wait out of the way, and do not drive on the field do not just drive around, stop wait and do checks Where are the wet holes? Do not drive through wet holes, avoid at all cost even if it takes you longer to start.

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How do we do it?. a When you are in the field and ready to enter the bed Which bed is the correct one to suit everyone? Is the next to last one done? Is it in the middle of the field? Is it in the same routine as others already there? Is there already someone coming from the other direction in the same bed?.

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What crop is it and what depth should you be at? – This is your responsibility to check it is correct. H ave you got the correct webs?.

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How do we do it?. A A When in the correct bed and starting Speed When starting a new field always start off very slowly which allows you time to alter the machine until you know the conditions De-stoner wheels Straight and in line with the wheeling Rear of the machine in the down position on lighter land and in the up position on heavy land Scrubber web - pressure off and not turning Depth – the most fundamental problem. REMEMBER SAFE STOP You should be checking your depth on a regular basis, the things that can altar depth in the bed are: Shear depth setting The amount of soil you are putting in the wheeling You need to be checking your depths regularly Scrubber webs Scrubber webs are there to help break up clods of soil, when the conditions are on the stickier side. They are not there to help you go faster and force soil and inevitably stone though the webs. In the past we have found that scrubber webs are one of the biggest courses of stone in the bed. What they tend to do is either force stone though the web or they hold up the stone and soil on the forth web and then the stones roll back between the 3 rd an 4 th web back into the bed, which as we discussed in the first slide is not our aim. Always ensure you carry soil to the top of the forth web – this will ensure stones are carried out onto the cross conveyor. PTO and Web speed There are lots of different ways to run the speeds and this all varies on the conditions. But remember Engine speed PTO speed and web speed are all related – Web speed to slow the smaller stones have no soil to carry them through, they roll back and fall into the bed. Web speed to fast the soil is carried though to quickly and blocks the scrubber web which forces stone though the web and also you fill the wheeling full soil as the machine does not have time to sieve it . Forward speed too fast – blocks the machine up and makes the slip clutch bang and in turn will wear up and break..

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What are the Consequences?. Recent 2 meter trials have shown that if the depth is meant to be at 14” but we are only at 11” there is an increase from 32 stones in the bed to a massive 83 stones in the bed:.

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What are the Consequences? Operations. Stone in the bed can create so many issues down the line and probably the most measurable is at harvest. We have found that stone within a salad bed can cause the forward speed and out-put to drop by a possible 50%-70%. And if this was over half of our salad area. No stone target – 5 loads a day Stone bed actual – 2 loads a day 2021 estimated tonnage 14532 of salads No stone target lifting days – 111 days Stone bed actual lifting days – 282 days So this adds extra time we all need to work and also a huge amount in cost.

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What are the Consequences? Operations. Also on top the dramatic decrease or increase in speed/extra work/ extra hours everyone is having to put in, there is also the knock on affect of the following crops/fields due to stones in previous fields. This is created because once the potato skins have set there is a set amount of time (variety/field dependant) before disease/pests and viruses start having a huge affect on the quality of the crop. Two of the most common examples are Black Dot and Wire worm. These were seen heavily in 2020 crop on fields such as:.

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Clock hill (catchpoles) Wire worm was at 0% at skin set and unfortunately by the time we came to harvest it was around 12%, and most customers have a 2% maximum defect on pest damage. Churchyards (leeches). Black Dot had made an exceptional good product into an extremely difficult to sell product. These are just couple of examples of the issues we have encountered due to late lifting.

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What are the Consequences? Sales. Morrisons Check no: 4776733 - 4776733_ Check no: 4776733 .4776733_.

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Customer Photos from the field Churchyards harvested in 2020.

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do auuueuex. Talentine – Churchyard field, set skin 0% Black DOT – Bright and a very good sample when they were ready for harvest.

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HAZARDS and the importance of SAFETY. When there are lots of people working in the field, there are many hazards. When turning on headlands and when in the field please keep a minimum of 10 meters apart. When you stop put your hazard lights on even if just for a moment. No use of mobile phones, unless handsfree discussions about work Concentrate, accidents happen when we are distracted. When driving on the main road your max speed should be 32K.

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Before you leave the yard. Make sure your tank is full of diesel You have all the right bearings You have your grease gun, depth stick, tape measure and basic tool kit in your cab You have goggles, gloves and your high viz.

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Round Up. Please remember Health and safety is number 1 But….. De-stoning at the correct depth is so important to the entire business, you might not see the consequences but in the long run we all do Keep checking the amount of stone inside the bed If you are not sure all our Managers are dedicated to improving on this, so if you can’t get hold of your direct report call any of us for help DON’T just carry on.

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Please answer the questions on the sheet provided and hand them in. Any questions please ask..