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Arable Farming
Cropping
The £ value of fym
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<blockquote data-quote="NeilT123" data-source="post: 2523456" data-attributes="member: 1710"><p>So the original question was “risky investment or no brainer?”</p><p></p><p>I am assuming that the analysis posted was prior to spreading, i.e. after composting and so that when spread at 12t/ha you are applying 58kg/ha Total N, 38kg/ha Total P2O5 and 78kg/ha Total K2O.</p><p></p><p>Assuming that <strong><u>all</u></strong> of the P & K will at some stage become available to the crop and is therefore a fertiliser replacement then on current TSP & MOP values that is worth about £50 per hectare but there are cheaper sources of P & K, e.g. Fibrophos, P-Grow & Sewage cake and this is based on all of the P&K in the FYM becoming available to the crop which may not happen.</p><p></p><p>With regard to putting a value on the N then it is only worth anything if you reduce your fertiliser N or it gives you a yield benefit. There has been chat on here about 10% availability so if it is 10% then I would suggest that you would not adjust fertiliser Nitrogen application for 6kg/ha of available N coming from the manure so there is no cost saving there so do you get a yield benefit?</p><p></p><p>There is no question that regular applications of OM will be beneficial to the soil and I did see some trial work from WRAP that showed that wheat yields did improve 0.5t/ha on fields treated with FYM but it was not clear what caused that yield improvement and it may be from the trace nutrients that manures apply and are not present in TSP and MOP but would be supplied by Fibrophos for example.</p><p></p><p>So “risky investment or no brainer?” I don’t think it is either. Your soils will benefit from regular applications of manure. That will help your crops but there is probably a net cost to you based on the FYM at £4 delivered in and whether you are happy to take that cost will depend on your philosophy, lowest possible cost of production or farming with a long term sustainable policy.</p></blockquote><p></p>
[QUOTE="NeilT123, post: 2523456, member: 1710"] So the original question was “risky investment or no brainer?” I am assuming that the analysis posted was prior to spreading, i.e. after composting and so that when spread at 12t/ha you are applying 58kg/ha Total N, 38kg/ha Total P2O5 and 78kg/ha Total K2O. Assuming that [B][U]all[/U][/B] of the P & K will at some stage become available to the crop and is therefore a fertiliser replacement then on current TSP & MOP values that is worth about £50 per hectare but there are cheaper sources of P & K, e.g. Fibrophos, P-Grow & Sewage cake and this is based on all of the P&K in the FYM becoming available to the crop which may not happen. With regard to putting a value on the N then it is only worth anything if you reduce your fertiliser N or it gives you a yield benefit. There has been chat on here about 10% availability so if it is 10% then I would suggest that you would not adjust fertiliser Nitrogen application for 6kg/ha of available N coming from the manure so there is no cost saving there so do you get a yield benefit? There is no question that regular applications of OM will be beneficial to the soil and I did see some trial work from WRAP that showed that wheat yields did improve 0.5t/ha on fields treated with FYM but it was not clear what caused that yield improvement and it may be from the trace nutrients that manures apply and are not present in TSP and MOP but would be supplied by Fibrophos for example. So “risky investment or no brainer?” I don’t think it is either. Your soils will benefit from regular applications of manure. That will help your crops but there is probably a net cost to you based on the FYM at £4 delivered in and whether you are happy to take that cost will depend on your philosophy, lowest possible cost of production or farming with a long term sustainable policy. [/QUOTE]
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The £ value of fym
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