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This dataset lists basic information about the plots of the NUMEX  experiment. 
It contains the coordinates of the center of the plot, a standardized lable of the plot and the treatment of the plot.

Abstract:

Fortnightly time series of measured concentrations of Cl, PO4-P, Total P, NH4-N, NO3-N, Total N, K, Na, Mg, Ca and Total organic C in throughfall at NUMEX San Francisco. The fortnightly time series extends between August 2007 and March 2013. Throughfall was sampled on the 20 NUMEX plots with Hellmann-type collectors. On each plot 20 replicates were collected, volume-weighted and bulked to one sample per plot. Samples were immediately filtered (4-7 µm) in the laboratory of the ECSF  and stored at -20 °C until transport in frozen state to Germany or to Switzerland for concentration measurements.

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AMF root colonization of roots extracted from the upper soil layer (5cm) at all NUMEX plots. Roots are stained with Trypan Blue, AMF root colonization is examined by the line-intersect method.

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Fortnightly time series of measured concentrations of Cl, PO4-P, Total P, NH4-N, NO3-N, Total N, K, Na, Mg, Ca and Total organic C in litter leachate at NUMEX San Francisco. The fortnightly time series extends between August 2007 and March 2013. Litter leachate was sampled on the 20 NUMEX plots with tero-tension lysimeters below the organic layer. On each plot 3 replicates were collected, volume-weighted and bulked to one sample per plot. Samples were immediately filtered (4-7 µm) in the laboratory of the ECSF and stored at -20 °C until transport in frozen state to Germany or to Switzerland for concentration measurements.

Abstract:

Fortnightly time series of measured concentrations of Cl, PO4-P, Total P, NH4-N, NO3-N, Total N, K, Na, Mg, Ca and Total organic C in soil solution (15 cm mineral soil depth) at NUMEX San Francisco. The fortnightly time series extends between August 2007 and March 2013. Soil solution was sampled on the 20 NUMEX plots with ceramic suction cups having a pore size of 1 µm installed at 15 cm depth in the mineral soil. On each plot 3 replicates were collected and bulked to one sample per plot. The samples were stored at -20 °C until transport in frozen state to Germany or to Switzerland for concentration measurements.

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The dataset includes physical and chemical properties of the organic layer and mineral soil at NUMEX San Francisco during sampling campaigns from 2007 to 2009. Following properties were measured: bulk density, horizon thickness, sand, silt and clay content, concentrations of Al, Fe, Mn, Zn, C, N, S, P, K, Na, Mg, Ca, cation exchange capacity, exchangeable cations Ca, Na, Mg, K, Al, Fe, delta 13C and delta 15N values. For details on used methods please see Wullaert, H. (2010): Response of nutrient cycles of an old-growth montane forest in Ecuador to experimental low-level nutrient amendments Johannes Gutenberg University Mainz, phd thesis (FOR816dw ID 885): http://www.tropicalmountainforest.org/publications.do?citid=885

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Analyses if morphological and physiological attributes of seedlings from the two most common species in NUMEX experiment at the three elevations. Changes in this attributes are altered by nutrient availability in this case fertilization might showed specific limitation for N or P.

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