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Regenerative Agriculture and Direct Drilling
Regen Ag General Discussion
Map for Direct Drilling
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<blockquote data-quote="AT Aloss" data-source="post: 7868831" data-attributes="member: 134478"><p>Key to soil Associations; note the capability for regular direct drilling is classified by “DD class”. This rates the capability according to 3 classes:</p><p>•Class 1 – capable of sequential direct drilling of autumn and spring sown cereals with minimal yield loss compared to conventionally cultivated;</p><p>•Class 2 - capable of sequential direct drilling of autumn sown cereals with minimal loss of yield, expected spring sown yield losses;</p><p>•Class 3 - incapable of sequential direct drilling of autumn or spring sown cereals without yield loss. Note yield loss may not be a margin loss overall due to the cost reductions.</p><p></p><p>For me it's the following soil types:</p><p>•572o: Burlingham 2 - Deep fine loamy soils with slowly permeable subsoils & slight seasonal waterlogging. Compaction is especially restrictive to direct drilling. DD class 2;</p><p>•572s: Bishampton 1 - Deep fine loamy soils with slowly permeable subsoils & slight seasonal waterlogging. DD class 2;</p><p>•511e: Swaffham Prior – Well drained calcareous coarse & fine loamy soils over chalk rubble. Deep non-calcareous loamy soils in places. DD class 1;</p><p>•571r: Hunstanton - Deep well drained often reddish fine and coarse loamy soils. Some similar calcareous soils over chalk. DD class 1;</p><p>•541r: Wick 1 – Deep well drained coarse loamy & sandy soils locally over gravel. DD class 1/2.</p><p>•711u: Holderness - Slowly permeable seasonally waterlogged fine loamy soils and similar soils with only slight waterlogging. Narrow strips of clayey alluvial soils. General DD class 2.</p><p>•512b: Landbeach – Permeable calcareous coarse loamy soils affected by groundwater over chalky ground. DD class 2.</p><p>•813f: Wallasea 1 - Calcareous and non- calcareous alluvial deep clay soils. Calcareous soils of this association can be direct drilled, provided occasionally subsoiled, general DD class 3.</p><p></p><p>Note that experience suggests that soils in DD classes 1 and 2 can be successfully direct drilled in both spring and autumn. Occasional corrective treatment may be needed depending on the capability of the soil to self-structure, and the effects of seasonal factors such as weather and any associated soil structure damage incurred. Soils in class 3 may require loosening on a more regular basis to optimise the results from direct drilling.</p><p></p><p>Reference: The suitability of soils for sequential direct drilling of combine-harvested crops in Britain: a provisional classification [cereals] [1979] Cannell R.Q. Davies D.B. Pidgeon J.D. Agricultural Research Council</p></blockquote><p></p>
[QUOTE="AT Aloss, post: 7868831, member: 134478"] Key to soil Associations; note the capability for regular direct drilling is classified by “DD class”. This rates the capability according to 3 classes: •Class 1 – capable of sequential direct drilling of autumn and spring sown cereals with minimal yield loss compared to conventionally cultivated; •Class 2 - capable of sequential direct drilling of autumn sown cereals with minimal loss of yield, expected spring sown yield losses; •Class 3 - incapable of sequential direct drilling of autumn or spring sown cereals without yield loss. Note yield loss may not be a margin loss overall due to the cost reductions. For me it's the following soil types: •572o: Burlingham 2 - Deep fine loamy soils with slowly permeable subsoils & slight seasonal waterlogging. Compaction is especially restrictive to direct drilling. DD class 2; •572s: Bishampton 1 - Deep fine loamy soils with slowly permeable subsoils & slight seasonal waterlogging. DD class 2; •511e: Swaffham Prior – Well drained calcareous coarse & fine loamy soils over chalk rubble. Deep non-calcareous loamy soils in places. DD class 1; •571r: Hunstanton - Deep well drained often reddish fine and coarse loamy soils. Some similar calcareous soils over chalk. DD class 1; •541r: Wick 1 – Deep well drained coarse loamy & sandy soils locally over gravel. DD class 1/2. •711u: Holderness - Slowly permeable seasonally waterlogged fine loamy soils and similar soils with only slight waterlogging. Narrow strips of clayey alluvial soils. General DD class 2. •512b: Landbeach – Permeable calcareous coarse loamy soils affected by groundwater over chalky ground. DD class 2. •813f: Wallasea 1 - Calcareous and non- calcareous alluvial deep clay soils. Calcareous soils of this association can be direct drilled, provided occasionally subsoiled, general DD class 3. Note that experience suggests that soils in DD classes 1 and 2 can be successfully direct drilled in both spring and autumn. Occasional corrective treatment may be needed depending on the capability of the soil to self-structure, and the effects of seasonal factors such as weather and any associated soil structure damage incurred. Soils in class 3 may require loosening on a more regular basis to optimise the results from direct drilling. Reference: The suitability of soils for sequential direct drilling of combine-harvested crops in Britain: a provisional classification [cereals] [1979] Cannell R.Q. Davies D.B. Pidgeon J.D. Agricultural Research Council [/QUOTE]
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