TREC-summary.Rsummer: May 10, 2018 - Aug 15, 2018
winter: Nov 1, 2018 - Jan 11, 2019
summer: May 13, 2019 - July 11, 2019
winter: Nov 6, 2019 - Jan 6, 2020
summer: May 5, 2020 - July 1, 2020
CropTrt)SH)
SS)
VB)
SHSSSHVBSSVBLocation
VFFOHHOCPlotName = [Site]_[treament]-[row] (VF_SHSS-1)PlotID integer
VF 1:36FO 37:72HH 73:108OC 109:144 All site are moldboard plowed before each planting cycle.
HH and OC were rockplowed March 2018.
biomass_soil_[season]_[crop].csv (biomass_soil_winter_SH.csv)
Season: time period of plantings (i.e. Summer or Winter)Location: experimental plot location at TREC [linking field]CropTrt: experimental treatment denoting cover crops in monoculture or mixture [linking field]CropName: abbreviated name of individual cover crops e.g. SH for sunn hempLeavesStems_tha: an estimate of aboveground biomass for each crop within a treatment at harvest [reported as a sample average (avg_) and standard deviation (sd_)]SOM_percent: soil organic matter as a percent of soil sample before plantingRoots_tha: an estimate of belowground biomass for each crop within a treatment at harvestWeeds_tha: an estimate of weeds biomass for each crop within a treatment at harvestTP_mgkg: soil total phosphorous concentration in mg/Kg before planting [summer only]GravelDryWgt_g: gravel dry weight in bulk density sample in gramsGravelVol_mL: gravel volume from bulk density sample in millilitersSoilDryWgt_g: soil dry weight from bulk density sample in gramsSoilVol_cm3: soil volume from bulk density sample in cubic centimeters (i.e. mL)SoilBD_gcm3: soil bulk density in grams / cubic centimetersSoilPorosity_percent: soil porosity from bulk density as a percent of sample volumePreIgnitionWgt_g: beaker and soil sample weight before muffle furnace PostIgnitionWgt_g: beaker and soil sample weight after muffle furnaceAshWgt_g: weight of ash minus beaker after muffle furnace LOIorSOM_percent: percentage of soil organic matter by LOI method NH4_mgL: ammonium concentration from soil sample in milligrams / LiterNO3_mgL: nitrate concentration from soil sample in milligrams / LiterNH4_mgKg: ammonium concentration from soil sample in milligrams / kilogramNO3_mgKg: nitrate concentration from soil sample in milligrams / kilogramheight_[season]_[crop].csv (height_winter_SH.csv)
SamplingWeek: week of sampling after planting dateEmergDay50_percent: day of fifty percent emergnce for a species in a unitLocation: experimental plot location at TREC [linking field]CropTrt: experimental treatment denoting cover crops in monoculture or mixture [linking field]Height_mm: canopy height of each crop at a Sampling Week [reported as a sample average (avg_) and standard deviation (sd_)]Diameter_mm: individual crop diameter at point where stem meets soil measured with a caliperpH: pH reading of soils as measured by an Oakton pH6+Chlorophyll_CCI: chlorophyll index of greeness as measured by an Appogee MC-100TotCH_ugcm2: chlorphyll index of greeness as measured by AtLeaf handheld meterSPAD: chlorphyll SPAD reading as measured by AtLeaf handheld meter Temp_F: temperature in Farenheit at time of CHL measurment (with AtLeaf handheld meter).