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- | < | + | ===== Agricultural land use and environmental indicators at 1x1 km grid resolution- High Nature Farmland index ===== |
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Main Contributors: | Main Contributors: | ||
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+ | The [[http:// | ||
+ | * **Arable crop index** | ||
+ | * The arable crop index takes into accound firstly a slightly modified **Shannon index measuring the diversity of shares of annual crops.**. The modification ensures index values between 0 and 1. High index values (close to 1) indicate a combination of small shares of many crops. The index drops if the number of the crops is reduced, or the rotation is dominated by large share of a few crops. It takes on the value zero in case of monoculture. The second part of the index is based on the **average mineral nitrogen fertilization application in kg/ha**. It is defined to be close to 1 with doses at or or below 20 kg per ha and drops non-linearly to zero for doses for 200 kg per ha or above. The overall index for the arable crop part is derived by multiplying the two index elements. {{: | ||
+ | * **Permanent crop index** | ||
+ | * The permanent crop index uses only the **mineral nitrogen fertilizer dose** to define a sub-index between 0 and 1 as explained for the arable crops. | ||
+ | * **Grass land index** | ||
+ | * The grass land index takes into the **ruminant stocking density**, calculated per fodder area, and takes on values between 0 and 1. {{: | ||
- | <div style=" | + | The overall index is derived by adding the three sub-indices (arable, permanent, grass land), weigthed with their share on total agricultural area. The methodology is based on a study conducted by [[http:// |
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- | High index values indicate a rich crop rotation or a high share of grass land combined with a low intensity of farming, generally assumed to be beneficial | ||
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- | a combination of small shares of many crops. The index drops if the number of the crops is reduced, or the rotation is dominated by large | ||
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- | share of a few crops. It takes on the value zero in case of monoculture.< | ||
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- | at or or below 20 kg per ha and drops non-linearly to zero for doses for 200 kg per ha or above. | ||
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- | The overall index for the arable crop part is derived by multiplying the two index elements.</ | ||
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- | on a study conducted by <a class=" | ||
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