Dataset paper "N2 use in perennial swards intercropped with young poplars, clone I-214 (Populus × euramericana (Dode) Guinier) in the Mediterranean area under rainfed conditions"

<p>These files contain the data produced within a 2-yr field experiment conducted in Pisa, Central Italy, to assess N dynamics in a young silvopastoral system (i.e., where two forage crops, sulla and ryegrass, were grown in intercropping with an alley row of poplar trees) compared to a pure pastoral system (i.e., where teh afore-mentioned forage crops were grown without trees).</p> <p>Specifically:</p> <p>- &quot;15N_poplars_Ntransfer.csv&quot; contains the data on N2-transfer from sulla to poplar trees</p> <p>- &quot;Averaged cumulate values.csv&quot; contains the data on aboveground biomass, N yield and N fixed of the forage crops, cumulated over the two years of experimentation;</p> <p>- &quot;Poplars growth.csv&quot; contains the data on plant height and trunk diameters ( at the foot and at 130 cm) collected on poplar plants at different dates (at plantation time and at the end of each experimental year);</p> <p>- &quot;Root_N_Nfix.csv&quot; contains the data on delta 15N, %N derived from fixation and N concentration in poplar tree roots sampled at the end of each experimental year;</p> <p>- &quot;Seasonal Data_AGB_N_Nfix.csv&quot; contains the data on aboveground biomass, N yield,&nbsp;delta 15N, %N derived from fixation and N concentration and N fixed of forage species observed at each sampling time (mowing date) within the two experimental years;</p> <p>- &quot;Soil_N_only SIPAST.csv&quot; contains the data of soil total Nitrogen and nitric Nitrogen observed only in the silvopastoral system at different positions on the field;</p> <p>-&quot;Soil_N.csv&quot; contains the data of soil total Nitrogen and nitric Nitrogen observed in the two cropping systems at different positions on the field.</p>