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Broom's Barn - Long Term Experiment No. 2 - LTSE

Relationships
Data Holder: 
Allison, Marc
Subnetworks: 
Rothamsted
Location:
United Kingdom
Latitude: 51.809118
Longitude: -0.355210
Background
Continent: 
Europe
Website: 
http://www.rothamsted.ac.uk/broom/
Year LTSE Began: 
1965
On-going or Terminated?: 
On-going
Comments: 
IACR Broom's Barn, Higham, Bury St. Edmunds, Suffolk, IP28 6NP, England archive - Time zero soil measurements taken. As far as I am aware samples are taken from each block of the experiment (0-23, 23-60,60-90 cm) are stored. * Details of soil sampling method: Auger - When sampled regularly several (6) cores are bulked together for each plot. * Soil is separated into layers * Details of measuring depths and soil layers: 0-23 cm: Originally one per rotation (ie 3 years) but now once per two or three rotations, dependent on labour availability. 23-60, 60-90 cm: Some samples on certain treatments in certain years. solid - Total carbon: Once per 2 or 3 rotations * Method of measuring total carbon: Dichromate (Walkley/Black) method * Total nitrogen: Once per 2 or 3 rotations * Method of measuring total nitrogen: Kjeldahl - modified to include nitrate. * Total mineral nitrogen: Yearly on certain plots * Method of measuring total mineral nitrogen: Extraction with 2M KCl, analysis by Technicon. * Soil bulk density or weight: Infrequently * Method of measuring soil bulk density or weight: Using "undisturbed" core method. * Other nutrients: P, K, Na, Mg - infrequently * Atmospheric inputs: On a weekly/monthly basis - see Keith Goulding. vegetative - Yield: Yearly * Total above-ground dry matter: Yearly * Total dry matter offtake: Yearly * Nitrogen content of offtake: Yearly * Yearly: P, K, Na, Mg
Environment
Annual Precipitation (mm): 
400-800
Mean Annual Soil Temperature (C): 
Mesic: 8 to 15C
Is temperature regime isothermic? ie, do mean monthly temperatures deviate by <6C?: 
Yes
Is atmospheric deposition chemistry monitored?: 
Yes
Dominant plant species (latin genus and species): 
Sugar beet, Spring oats, Winter wheat.
Landuse: 
Arable
Ecoregion: 
Cool Temperate
Landform (general description): 
"Land use = cropping sequence: Sugar beet, Spring oats, Winter wheat. Treatments: 3 levels of N, 2 levels of P, 2 levels of K, Na and FYM."
Slope (%): 
0-2%
Experimental Design
Design (short description): 
Width of smallest plot is 5.08 m Length of smallest plot is 15.95 m Slope: slight . Shape: concave Details of direction of cultivation: Right angles to plots Width of Discard Strip around plot: 1 m b) Details of replication, randomization and controls There are at least 2 replicates in the experiment. The experiment has a randomized plot design. There are control plots described as follows: * Treatment A: No inputs; Treatment I: Standard inputs
Soil Classification
Soil taxa (ex, Great Group of Soil Taxonomy): 
Barrow series: Typical paleoargillic brown earth
Soil/Data Archive
Soil solid samples archived: 
Yes
Samples from multiple depths: 
Yes
Year of first sampling for archive: 
1965
Soil Solid Data
pH and acidity: 
Yes
Nitrogen: 
Yes
Other macronutrients: 
Yes
Bulk Density: 
Yes
Vegetation Data
Biomass above ground: 
Yes
Macronutrient contents: 
Yes
Harvest mass: 
Yes
Harvest nutrient contents: 
Yes