Nutritional content of alpine grassland in Gran Paradiso National Park, 2013 dataset

<strong>Abstract</strong> This dataset has been collected to validate the predictability of forage quality of alpine grasslands from remotely sensed data. We investigated this relationship in the Gran Paradiso National Park (Western Italian Alps). In 2013 we collected a total of 112 grass samples within random plots, from June to July. From these samples we estimated biomass, relative and available crude protein, fiber (neutral detergent, acid detergent and lignin) and fiber digestibility (at 24 and 240 hours).Data were used in the following publication: L. Ranghetti, B. Bassano, G. Bogliani, A. Palmonari, A. Formigoni, L. Stendardi and A. von Hardenberg (2016). «MODIS time series contribution for the estimation of nutritional properties of alpine grassland». <i>European Journal of Remote Sensing</i>, 49: 691-718, doi: http://dx.doi.org/10.5721/EuJRS20164936. <strong>Data structure</strong> field2013.csv int_id : int record ID (serial)<br>text_id: Factor w/ 142 levels record ID (string)<br>group : Factor w/ 18 levels group of the harvest (number of repetition)<br>doy : int day of the year of the harvest<br>plot : Factor w/ 19 levels plot name (matching with plot.2012$plot)<br>AB : num Aboveground Biomass (g)<br>H2O : num Water content (ratio between AB and fresh weight)<br>CP : num Crude Protein (% of total weight)<br>NDF : num Neutral Detergent fiber (% of total weight)<br>ADF : num Acid Detergent fiber (% of total weight)<br>ADL : num Lignin (% of total weight)<br>dNDF24 : num NDF digestibility after 24 hours (% of NDF)<br>dNDF240: num NDF digestibility after 240 hours (% of NDF) plots2013.dbf plot : Factor w/ 19 levels string code which identify single plots<br>elevation: int elevation of the plot, estracted from the Tinitaly 10m DEM (see text)<br>aspect : int aspect of the plot, derived from the elevation map