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capri:concept:hnv [2011/04/12 10:23] – gochtcapri:concept:hnv [2022/11/07 10:23] (current) – external edit 127.0.0.1
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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>
  
 +<hr style="color: 'blue'; height: '2'; text-align: 'left';">
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 +Main Contributors: Maria-Lusia Parrachini, Phillippe Pointereau, Wolfgang Britz
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 +<hr style="color: 'blue'; height: '2'; text-align: 'left';">
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 +<div style="float:right;padding:20px;padding-right:0px">
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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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 +</div>
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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
 +
 +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
 +
 +elements:</P>
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 +<UL>
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 +   <LI><P><B>Arable crop index</B></P>
 +
 +       <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
 +
 +       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>
 +
 +       <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
 +
 +       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.</P>
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 +
 +
 +<P><img style="text-decoration: none;border: none;color: white" src="images\NIndex.jpg"/></P>
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 +
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 +       </UL>
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 +   </LI>
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 +
 +
 +</UL>
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 +<ul>
 +
 +
 +
 +   <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>
 +
 +       </UL>
 +
 +   <LI><B>Grass land index</B>
 +
 +       <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
 +
 +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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