capri:concept:hnv []

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<H2><a class=“intext” HREF=“/dokuwiki/doku.php?id=capri:concept:spatialdownscaling”>Agricultural land use and environmental indicators at 1×1 km grid resolution</A><BR> - High Nature Farmland index</H2>

Main Contributors: Maria-Lusia Parrachini, Phillippe Pointereau, Wolfgang Britz

<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.

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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 <LI><P><B>Arable crop index</B></P>

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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

     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.<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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 </LI>

</UL>

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 <LI><P><B>Permanent crop index</B></P></LI>

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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>

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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>

<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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