Data

The following data is collected at each LTARN site:

Plant Data

Alfalfa

  • Dry Matter @ each cutting
  • NIR Analysis
    • Protein, ICP, ADF, NDF, Fat, Ash, Lignin, NDFICP, Insol, Sugar, NDFD, Ca, Cl, K, Mg, P, and S
  • Elemental Analysis
    • Al, B, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, P, Pb, and Zn
  • Bi-weekly measurements
    • PAR (above and below canopy), LAI, plant height, growth stage

Spring Wheat

  • Grain yield
  • Stover dry matter
  • Whole plant dry matter
  • Harvest index
  • Seed weight
  • NIR Analysis (Grain and Stover)
    • protein, oil, sat fats, fiber, ash, starch, ADF, NDF, + Amino acids
  • Elemental Analysis (Grain and Stover)
    • Al, B, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, P, Pb, Zn + Total N
  • Bi-weekly measurements
    • PAR (above and below canopy), LAI, plant height, growth stage

Corn silage

  • Stand count
  • Wet weight
  • Dry matter
  • Moisture
  • NIR Analysis
    • protein, ICP, ADF, NDF, Starch, Fat, Ash, Lignin, NDFICP, Insol, pH, sugar, Ca, P, K, Mg, S, Cl,
  • IVDMD, and NDFD
  • Elemental Analysis
    • Al, B, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, P, Pb, Zn + Total N
  • Bi-weekly measurements
    • PAR (above and below canopy), LAI, plant height, growth stage

Soybean

  • Stand count
  • Whole plant dry matter at R6
  • Grain yield
  • Dry matter at harvest
  • Stover dry matter
  • Harvest index
  • Seed weight
  • NIR Analysis (grain)
    • protein, oil, sat fats, fiber, ash, starch, ADF, NDF, + Amino acids
  • NIR Analysis (whole plant at R6 and Stem at harvest)
    • lignin, uric acid, rhamnose, arabinose, xylose, mannose, galactose, and glucose
  • Elemental Analysis (Grain)
    • Al, B, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, P, Pb, and Zn
  • Elemental Analysis (whole plant at R6 and stem at harvest)
    • Al, B, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, P, Pb, Zn + Total N
  • Bi-weekly measurements
    • PAR (above and below canopy), LAI, plant height, growth stage

Corn

  • Stand counts
  • Grain yield
  • Stover dry matter
  • Cob dry weight
  • Harvest index
  • Seed weight
  • NIR Analysis (grain)
    • protein, fat, fiber, ash, starch
  • NIR Analysis (cob and stover)
    • CP, ADF, NDF, TDN, Ca, Ash, Lignin, IVTD, NDFD
  • Elemental Analysis (grain, cob, stover)
    • Al, B, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, P, Pb, Zn + Total N
      • Bi-weekly measurements
        • PAR (above and below canopy), LAI, plant height, growth stage
field instrumentation

Weather Data

  • Wind speed
  • Wind direction
  • Rainfall
  • Air temperature
  • Relative humidity
  • Barometric pressure
  • Solar radiation
  • Snow depth
  • Pan evaporation
  • Soil moisture retention

Soil Data (@ 10, 20, 40, 60, 100, and 200 cm soil depth)

  • Soil temperature
  • EC
  • Volumetric water content

Soil Water (in weather station)

  • Matric potential
  • Tensiometers

Soil Fertility

  • pH, P, K, OM in whole plots late June (6 locations/plot and composited)
  • Soil Nitrate in microplots (0-15, 15-30, 30-60, 60-90, 90-120 cm depths)
  • Bulk Density, CEC, and Texture (WA and LA in 2014, GR in 2015)

Nematodes

  • Time Zero (6 samples/plot composited, 0-10 and 10-20 cm depths)

Microbes

  • Annual sampling in June and at harvest (6 samples/plot composited, 0-15 cm depth)

Soil Moisture Retention

  • Sampled in 2014 at WA and LA and 2015 in GR (1 m depth)

Remote sensing

  • NDVI/PRI and IR Temperature (over row, between row, and 300 angle across rows
  • N treatment microplots only