Home
  Overview
  Membership
  Members
  Topical Comment
  Links
  Events
  Case Studies
  Contact SMI
  FAQs
  Press Articles
  Publications
Case Study 11 - Plough and reduced cultivation systems
Location Suffolk
Size, average field size and spread 938ha
Soils and landscape On Chalky Boulder Clay with predominantly dense soils that are slowly permeable and seasonally waterlogged. Clay loam or sandy clay loam soils over clay (Beccles association) are widespread, mixed with better-structured calcareous clays (Hanslope association). This case study comprises several farms within a 12km (8 mile) radius. Fields are predominantly flat with some gradual slopes.
Cropping Apart from 89ha of sugar beet, 51ha of vining peas and 128ha set aside, the crops are all combinable with 523ha winter wheat, 73ha winter oilseed rape, 37ha winter barley and 37ha spring barley.
Workforce Two working partners and 2 full time tractor drivers’ plus causal help at harvest manage the farm.
Equipment and cultivation machinery

2 x Caterpillar 55 - 270 hp, 400 hp 4 years old (second-hand 2000); 2 x 12 5 hp wheeled tractors; 100 hp runabout tractor; 80 hp runabout tractor; 24m Amazone pneumatic fertiliser spreader; 24 m Sands 2000l Self Propelled Sprayer with Airtec nozzles; Claas Lexion 480 combine with a Horsch trailer. For cultivation a 10- and 5-furrow plough, 8m Vaderstad Press, 8m Vaderstad cultivator with Crosskill rolls’; 6m Simba Solo, 6m Vaderstad Rapid drill with front tines, 12m rolls.

Cultivation Policy

Until recently the farm has almost exclusively ploughed, having reduced ploughing time and cost to a minimum with high output machinery. Part of the decision for further change was due to the expansion in the area farmed, often taking in land with a blackgrass weed problem. Ploughing is seen as a very complete operation, but the farm size is now such that alternatives to the plough on part of the hectarage needs to be and is being considered. The farm is changing the 6m Vaderstad Rapide drill, bought second-hand and now 7 years old, for an 8m System Disc version. The farm anticipates it will bring advantages of added mixing with more straw on the surface and open up enhanced opportunities for a much-reduced scratch and drill cultivation, especially to establish the oilseed rape.

Realising the increased cost and resulting times of continuing to plough set against the plans for expansion when land becomes available at a sensible price, the farm decided they needed to have a quicker and alternative establishment method. The wheat yields are regularly above 10 tonnes per ha with the resulting high volumes of straw. The concerns of discing and smearing in wet conditions were allayed with the incorporation of subsoil tines in the Simba Solo. Less hectares were established with the Solo in the wet autumn of 2000 than had been expected.

 
  Crop sequence        
Operation New Crop (2001 season) Plough or solo Approximate Cost (£/ha) Approximate overall time taken (min/ha)
1st winter wheat 2nd winter wheat Plough £96 94
1st winter wheat 2nd winter wheat Solo £76 47
Winter wheat Winter barley Solo £76 47
Winter wheat Winter barley Plough £96 94
Winter barley Oilseed rape Solo £76 47
Winter barley Oilseed rape Plough £96 94
Sugar beet Winter wheat Plough £79 79
Winter wheat Winter beans Plough £79 79
Winter wheat Sugar beet Anticipated solo but will plough £76 47
*No glyphosate spray has been used to date to kill off any weed growth. Where a second pass has been necessary behind the Solo a further 15 minutes per ha and a cost of £15 per ha needs to be added.
 
Discussion  
Decision to change The farm has a good reputation in the area for producing high yields and generally doing the job well with up-to-date machinery. They are keen to expand when extra land can be acquired at the right price and they anticipate and need to have a proven cultivation system in place for this expansion.
How They visualise continuing to plough at least part of the hectarage in rotation for the foreseeable future. The Solo has worked reasonably well showing undoubted promise but at times the very high straw yields has necessitated another pass and the wet autumn has limited the area that was anticipated for the Solo.
Benefits The advantages of taking out compaction during cultivation were well illustrated in some fields and this will result in less separate remedial operations overall. Another cultivation pass is likely to be necessary in some fields. The owners see advantages in keeping the press separate from the Solo, perhaps 24 hours later.
  Problems   Under the wet conditions the chop and straw spread resulting from the CTS combine was not as good as was hoped for, showing how critical this is to minimise the number of passes.
  Solutions Found  

The farm press needs upgrading with a levelling bar for best effect in tandem with the Solo, as a separate operation or working on ploughed land. A small amount of base N is likely to be added to the P and K fertiliser applied by a contractor in the autumn to overcome the lock up of nitrogen which has been found.

 
SMI COMMENT
Traditional and well respected farm; can just about manage with all-plough situation. With the intention to farm more land, alternatives to the plough must be sought. However, this reduced plough system saves 50min/ha, equivalent to 67 man-days in autumn and 19 man-days in spring. In future, weeds should be sprayed out before drilling.
 
Soil Group Type of Year M.W.D.s'   M.W.D.s'
Beccles
H anslope
Normal
Wet
77
60
  24
3
Man days required for current reduced cultivation
Plough/press/drill/roll = 1.67hr/ha approx 800ha (810)   Harrow (+2) + drill for maize
  Plough/harrow/drill = 2 1 / 2 hr/ha approx 800ha (810)