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| | <H2><a class="intext" HREF="/dokuwiki/doku.php?id=capri:concept:spatialdownscaling">Agricultural land use and environmental indicators at 1x1 km grid resolution</A><BR> - High Nature Farmland index</H2> |
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| | Main Contributors: Maria-Lusia Parrachini, Phillippe Pointereau, Wolfgang Britz |
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| | <a href="images\HNV_pl.jpg"> |
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| | <img style="text-decoration: none;border: none;color: white;" src="images\HNV_pl.jpg" width="400px"/></a> |
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| | <P><I>Intermediate results for Poland</I></P> |
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| | <P>The <a class="intext" href="http://agrienv.jrc.it/activities/hnv/">High Nature Farmland</a> index tries to espress in one single number the "nature likeness" of farming practises. |
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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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| | for the environment, by allowing for high bio-diversity and reducing harmful impacts on the environment. The preliminary index, still in development, is the built from the following |
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| | elements:</P> |
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| | <UL> |
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| | <LI><P><B>Arable crop index</B></P> |
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| | <UL> |
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| | <P>The arable crop index takes into accound firstly a slightly modified <B>Shannon index measuring the diversity of shares of annual crops.</B>. The modification |
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| | ensures index values between 0 and 1. High index values (close to 1) indicate |
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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.<P> |
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| | <P>The second part of the index is based on the <B>average mineral nitrogen fertilization application in kg/ha</B>. It is defined to be close to 1 with doses |
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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.</P> |
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| | <P><img style="text-decoration: none;border: none;color: white" src="images\NIndex.jpg"/></P> |
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| | </UL> |
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| | </LI> |
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| | </UL> |
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| | <LI><P><B>Permanent crop index</B></P></LI> |
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| | <UL> |
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| | <P>The permanent crop index uses only the <B>mineral nitrogen fertilizer dose</B> to define a sub-index between 0 and 1 as explained for the arable crops.</P> |
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| | </UL> |
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| | <LI><B>Grass land index</B> |
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| | <UL> |
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| | <P>The grass land index takes into the <B>ruminant stocking density</B>, calculated per fodder area, and takes on values between 0 and 1. </P> |
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| | <P><img style="text-decoration: none;border: none;color: white" src="images\LUIndex.jpg"/></P> |
| | </UL> |
| | </UL> |
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| | <P>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 |
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| | on a study conducted by <a class="intext" href="http://www.solagro.org/site/015.html">Philippe Pointerau from Solagro, Toulouse, France</a>.</P> |
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