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<blockquote data-quote="shakerator" data-source="post: 474837" data-attributes="member: 955"><p>Still not convinced of N efficacy of no till in winter crops.</p><p></p><p>Legumes yes cereals with composts/ manures yes, crops after leys yes</p><p></p><p>But</p><p></p><p>Heavy land denitrification risk higher?</p><p></p><p>Evidence that OM builds and N released in future years? Mixed</p><p></p><p>Chemical nitrogen is generally unhelpful to many biological processes, and my gut is it might work (be controlled) better in a sterilised (ploughed) system. Residual herbicides certainly do. But then you have a crop growing in loose soil over winter with minimal rooting and rain washing everything away with no weeds to capture leached nutrient.</p><p></p><p></p><p>Glyphosate better than tillage? Debatable !</p><p></p><p>It's probably the learning curve....but in winter cereals I feel you have to try 10 times as hard to achieve the same no till yield as tilled....</p><p></p><p>Spring crops a completely different kettle of fish.</p><p></p><p>My wish list:</p><p></p><p>Set of shades which when you look at a no till field remove all residue and replace with black soil.</p><p></p><p>A sign next to every field explaining how much it has cost you to get the crop to that stage!</p><p></p><p>A year out to cover crop and manure the whole place.</p><p></p><p></p><p>!!'</p></blockquote><p></p>
[QUOTE="shakerator, post: 474837, member: 955"] Still not convinced of N efficacy of no till in winter crops. Legumes yes cereals with composts/ manures yes, crops after leys yes But Heavy land denitrification risk higher? Evidence that OM builds and N released in future years? Mixed Chemical nitrogen is generally unhelpful to many biological processes, and my gut is it might work (be controlled) better in a sterilised (ploughed) system. Residual herbicides certainly do. But then you have a crop growing in loose soil over winter with minimal rooting and rain washing everything away with no weeds to capture leached nutrient. Glyphosate better than tillage? Debatable ! It's probably the learning curve....but in winter cereals I feel you have to try 10 times as hard to achieve the same no till yield as tilled.... Spring crops a completely different kettle of fish. My wish list: Set of shades which when you look at a no till field remove all residue and replace with black soil. A sign next to every field explaining how much it has cost you to get the crop to that stage! A year out to cover crop and manure the whole place. !!' [/QUOTE]
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