The following data are collected at each LTARN site:
Plant
Plant
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
Soybeans
- 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
- Bi-weekly measurements
- Al, B, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, P, Pb, Zn + Total N
Soil
Soil
Soil Data
At 10, 20, 40, 60, 100, and 200 cm soil depth:
- Soil temperature
- EC
- Volumetric water content
Soil Water
- 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)
Soil Moisture Retention
- Sampled in 2014 at WA and LA and 2015 in GR (1 m depth)
Other
Other
Weather Data
- Wind speed
- Wind direction
- Rainfall
- Air temperature
- Relative humidity
- Barometric pressure
- Solar radiation
- Snow depth
- Pan evaporation
- Soil moisture retention
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)
Remote Sensing
- NDVI/PRI and IR Temperature (over row, between row, and 300 angle across rows
- N treatment microplots only
Instrumentation
Basic instrumentation at each network node includes a Campbell Scientific weather station (CR1000 data logger, enclosure, solar panel, charging components, wind monitor, tipping bucket rain gauge, temperature/RH probe, pyranometer, barometer, all mounting hardware), plus:
- CSI Multiplexer
- Sonic snow depth sensor
- Soil temperature and moisture sensors
- Evaporation station
- Cellular modem and antennas
- Water table monitoring devices (type TBD)
- Campbell 229-L Heat dissipation matrix potential sensors at weather station, 3 depths
- Campbell T4 Tensiometers at weather station, 3 depths
- Apogee infrared radiometer for canopy temperature.
- Decagon Spectral Reflection Sensors NDVI, PRI on boom at angles