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User story: One-pass Grimme potato planting rig boosts output

Insights

By going wider and reducing the number of passes, one Lincolnshire grower is seeing the benefits of an all-new potato planting system. Farmers Guardian gets a user’s view of a Grimme GL430T planter.

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A Grimme GL430T planter has helped reduce establishment costs at Eastoft Grange Farm.

Will Gagg is pleased with the success of the new system.

Cutting potato establishment costs while increasing output without compromising yield or quality, has been a key focus for Lincolnshire potato grower Will Gagg of RJ and AE Godfrey’s Eastoft Grange Farm near Scunthorpe.

 

With a responsibility for 336 hectares (830 acres) of main crop potatoes grown for the pre-pack market, Mr Gagg believes he is well on course to finding the solution, with the 2017 season being the fifth since changing his planting regime. Despite average yields dipping to 40 tonnes per hectare (16 tonnes per acre) in 2015, the farm’s five year average is 54 tonnes per hectare (22 tonnes per acre). Varieties include Maris Piper, Nectar, Melody, Sapphire, Desiree, Safari and Estima, which suit the predominantly silty soils with irrigation.

 

Mr Gagg says traditionally the planting operation on the farm involved a six or seven pass system starting with the plough followed by deep ridging, two passes with a bedtiller, then declodding and finally planting.

After the appalling weather conditions during planting in 2012, Mr Gagg realised he had to find a system which would mean he could decide when the best time was to plant, rather than being dictated to by the weather due to the limited number of dry days at planting.

The new planter incorporates five different operations in one pass.

As a result, he approached Grimme in 2013 to see what options were potentially available to boost output and wrestle back control from the weather. At that time, he was operating a two-row planting system and it was suggested output could be improved by switching to a four-row system. Mr Gagg says; “We had seen a four-row system working in Holland which was impressive, so we developed our own with input from Grimme.”

 

Moreover, the decision was also taken to reduce the number of passes in the establishment operation by combining tilling, planting, fungicide and nematicide application and liquid fertiliser placement. “This year will be our fourth season planting potatoes based on a four-row system," he says. "We have easily reduced our establishment costs by £150/ac without compromising yields, and our output is now about 45ac/day with an average forward speed of 7kph. In 2015 we planted 450 acres with one machine which took 18 days.”

 

For the new regime to work land is still ploughed early when it is dry and left to frost mould to help break the soils down into a fine tilth as well as bury trash and weeds. At planting a Basilier cultivator with subsoiler tines prepares the ground straight in front of the planter to a depth of 40cm, which leaves a ‘flat cultivated top no-bed scenario’. The cultivator operates around the clock using two drivers working in 12 hour shifts.

A 360hp tracked John Deere is used to drive the planter.

“On some of our lighter soils we don’t even need to go in with a Basilier,” says Mr Gagg. “Instead we just go straight in with our planting rig onto frosted plough work. A key difference is that we are not bringing up soil from deep down,” he says. “We are only interested in using the top frost moulded soil. With a lot of the deep ridging systems used on farms, we feel they create a plough like environment which is not conducive to establishing a good crop.

 

“Our bedtiller/planting combination produces a loose soil and light seedbed,” he explains. “Hydraulic ridge pressure with ‘Kit-Kat’ ridging hoods on the planter, adjustable from the cab, helps to keep a regular flow of soil continually moving through it. Running the planter on the flat, un-ridged soil means we can pull it from a central position, rather than offset. We aim for about 6.5-7 inches of depth.”

 

Replacing the old two-row planter is a Grimme GL430T trailed four-row planter fitted with a GR360 bedtiller/rotary cultivator and various other appliances to provide fungicide, nematicide and liquid fertiliser application, which is pulled by a low ground pressure John Deere 360hp crawler.

 

The GR360 rotary tiller element hangs independently on a three point linkage in front of the planter and can be lifted and lowered hydraulically from the cab.

Output is about 18 hectares (45 acres) per day with the new planter.

If the planter hits a heavy patch in the field, the depth can be adjusted accordingly. Two extra wheels on the planter help take the weight of the tiller.

 

“Any additional application appliances such as for fungicide, nematicide and liquid fertiliser, are all bolted on to the main planter frame without any requirement for welding,” says Mr Gagg.

 

Despite its size, easily 12m (40 feet) in length including the tractor, Mr Gagg says it is still very manoeuvrable because the GL430 has independent steering. He also says that there has been a massive fuel saving, with the crawler using between 450-550l/day. “It’s a big planting rig but the only real downside is the fact that the cab is like a spaceship inside with a host of individual controls to run different appliances such as VC50 for the planter, a Chafer/Horstine control for liquid fertiliser, a TMAir control for nematicide, an AS120 Amistar applicator and all the GPS electronics.

 

“It is simple to use, however,” says Mr Gagg. “And we have had very few breakdowns. This is a key point when under pressure during planting, where downtime is not an option. The only testing incident we have had was when an axle broke in the morning, but by 3pm Grimme had got us up and running again.

GL430T specifications

  • Number of rows: four
  • Hopper capacity: 3,000kg
  • Tiller: Grimme GR360
  • Applicators: fungicide, nematicide and fertiliser
  • Length with front frame and shaping board: 6.35m
  • Width with 900mm row spacing: 3.9m

“When we switched planter we opted for a cup planter because we wanted to achieve specific spacing and this can’t be achieved in our opinion with a belt planter. The only downside is that we have to have one staff member permanently carting seed to keep the planter going. We operate with two high tip trailers with one always in the field.”

 

Mr Gagg also operates another two Grimme GL430T four-row planters. The original planter with tiller and front mounted liquid fertiliser applicator plants 220 hectares (550 acres) in North Lincolnshire, East Yorkshire and the Isle of Axholme. A second GL430T rig with GR360 rotary tiller plants 100 hectares (250 acres) in the Holbeach area. A third GL430T planter without a tiller is currently used to plant 120 hectares (300 acres) on rented land on the Wolds.

 

With tillering, planting, fungicide and nematicide application plus liquid fertiliser placement all done in one pass now, and the move to a four row machine, it means planting can be done in a much more timely manner and in the right conditions, says Mr Gagg. “Crop health has also improved because potatoes are being planted into warmer soils. In particular, we have seen a marked decrease in disease incidence, especially rhizoctonia which can easily reduce yields by four tonnes per acre.”

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