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- W3138029178 abstract "Using NDICEA, farmers can identify where problems with nutrient loss/imbalance occur in their rotation. They can experiment with changes in rotation or management to find the most effective strategies to address nutrient imbalances and nutrient losses due to leaching.Practical recommendation• NDICEA is a freely available, computer-based nutrient budgeting tool developed by the Louis Bolk Institute in the Netherlands. It takes data on the crop rotation for an individual field rotation, alongside data on climate, soil properties and management practices (e.g. seed rates, fertiliser application, cultivation regimes etc.) to map changes in soil nutrients over the course of the rotation.• Application of the tool on seven organic farms found that, of eight fields modelled, seven had negative organic nitrogen balances and five had negative phosphate and potassium balances. The only farm with positive levels for both minerals achieved this through applications of either compost (35 t per ha) or chicken manure (10 to 17 t per ha) for six (out of eight) years of the rotation.• In all cases, many of the nutrients added to the fields were lost through leaching or harvest of the high fertility ley before being available to the commercial crop. This was especially the case where the ley was broken in autumn, leaving the soil susceptible to leaching and denitrification over winter. Breaking the ley in spring makes the nutrients available for the next crop rather than being lost by leaching or denitrification. This is true even for autumn cropping.• The biggest improvements to nutrient balance resulted from changing tillage practices to a reduced-till or, ideally, no-till system. For several cases, this change alone was enough to result in positive nutrient and organic nitrogen balances. Leaving the straw behind had very little impact on nutrient balances but did in-crease organic matter. Increasing the yield of the grass-clover ley can also significantly improve organic nitrogen balances plus soil nutrient retention.• Using digestate from anaerobic digestion could present an alternative to rock phosphate. In addition to supplying phosphate, digestate can add nitrates, potassium and organic matter to the soil." @default.
- W3138029178 created "2021-03-29" @default.
- W3138029178 creator A5026629420 @default.
- W3138029178 date "2018-01-01" @default.
- W3138029178 modified "2023-09-24" @default.
- W3138029178 title "NDICEA - A digital tool to model nutrient balances across a crop rotation (OK-Net Arable Practice abstract)" @default.
- W3138029178 hasPublicationYear "2018" @default.
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