1 Dataset title: Remarkable solar panels Influence on soil moisture, micrometeorology and water-use efficiency 2 Authors: Elnaz Hassanpour Adeh, John Selker, Chad Higgins 3 Abstract: In this dataset we present the environmental effect of solar panels. We had two weather stations, one in a control area and one in an area with solar panels. The weather stations collected wind speed, temperature, solar radiation and relative humidity. We also measured soil moisture in different shaded zones under the panel and control area. We used the Daubenmire method for grass classification and gathered data from the solar field. 4 Principal investigator: Chad Higgins Biological and Ecological Engineering Department 5 Contact information: Chad. Higgins Biological and Ecological Engineering Department chad.higgins@oregonstate.edu Telephone: 541.737.2286 6 Methods: The weather data presented here were collected with decagon sensors during summer 2015(May - August) in a solar farm in Oregon State University campus. The soil data were collected with a neutron probe device on the same dates. The grass data were collected twice: once in the middle of the summer to investigate the grass species and once at the end of summer to measure dry biomass. 7 File list and attributes: There are three datasets associated with this readme file. A) Grass: Grass samples for dry biomass monitoring collected from fenced area so sheep grazing won’t affect the samples. These data were collected at the end of growing season in late August.For grass classification 36 samples gathered from control area and 6 samples from solar area at the middle of the growing season in July. Here, dry biomass data is presented. B) Soil: There are 33 csv files in this folder that describe neutron probe measurements. The file name of the files is indicative of the date when the measurement was taken, in a format mmddyy, where mm is the month, dd is the day of the month, and yy are the last two digits of the year. C) WeatherStation: There are a total of 31 files collecting data from April to August 2015 from 4 loggers from two weather station towers. Each tower had four levels, 0.5, 1.2, 2.3 and 2.7 meters. Null values are documented as N/A data in the excel files is due to malfunctioning instrument. Variable lists for each dataset are below and are structured as follows: [Variable name] (units): description A) Grass shaded (grams): 6 samples for dry bio-mass where is totally shaded by solar panels alley (grams): 6 samples for dry bio-mass in between panels where it was totally open control (grams): 6 samples for dry bio-mass in control area where it was totally open B) Soil Each file has 10 categories with the following information: 1. R1, R2 and R3 (neutron counts per 36 seconds) in the Right side of the solar panel at 6 depths (0.1, 0.2, 0.3, 0.4, 0.5, 0.6 meters) with three repetitions. 2. L1, L2 and L3 (neutron counts per 36 seconds) are neutron readings in the Right side of the solar panel at 6 depths with three repetitions. 3. M1 and M2 (neutron counts per 36 seconds) are neutron readings in the Middle side of the solar panel at 6 depth with three repetitions. 4. OL and OM (neutron counts per 36 seconds) are neutron readings in the Left and Middle part of the Control area at 6 depths with three repetitions. C) WeatherStation Each logger collects data at two heights. openlow (collects data at 0.5 and 1.2 meters) and open_up (collects data at 2.3 and 2.7 meters) are loggers in the control area. LowerSol (collects data at 0.5 and 1.2 meters) and UpperSol(collects data at 2.3 and 2.7 meters) are loggers in the solar area. Columns 2-6 are same as columns 7-11 but for different heights. If file name has low suffix/prefix, columns 2-6 measures data at 0.5 meters and columns 7-11 measures data at 1.2 meters. If file name has up suffix/prefix, columns 2-6 measures data at 2.3 meters and columns 7-11 measures data at 2.7 meters. Column 12 measures radiation at 1.2 meters for file names with low suffix/prefix and measures radiation at 2.7 meters for file names with up suffix/prefix. Each file has 12 columns col 1 is time in format MM/dd/YY hh:mm col 2 is wind speed in m/s col 3 is wind gusts in m/s col 4 is direction(degree) col 5 is relative humidity, unit less col 6 temperature in centigrade col 7 is wind speed in m/s col 8 is wind gusts in m/s col 9 is direction(degree) col 10 is relative humidity, unit less col 11 temperature in centigrade col 12 Radiation in W/m2