Nitrate and ammonia, use for measure (history)
Description
Additional use for nitrate (nitrogen) measures and ammonia measures. This layer is the work map from the Plan of Approach Regional Manure and Ammonia Policy, as established by GS, dated September 2000. This layer has been compiled using a selection on the vegetation map (> 5 ha and clipping on zones 4.5 and 6) and a buffered dry sand map (Decision on sand and discharge soils, Alterra 1998).
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