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Lethbridge: Rotation U - irrigated cropping system - LTSE

Relationships
Data Holder: 
Smith, Elwin
Publications: 
A comparison of strategies for ameliorating subsoil acidity: I. Long-term growth effects
Location:
Lethbridge Research Centre
Lethbrige, T1J 4B1
Canada
Latitude: 49.702962
Longitude: -112.757492
Background
Continent: 
North America
Year LTSE Began: 
1911
On-going or Terminated?: 
On-going
Comments: 
The treatments have changed over time. Originally sugar beets and potatoes were grown. Major changes occurred in 1933, 1990 and 2004.
Environment
Annual Precipitation (mm): 
<400
Mean Annual Soil Temperature (C): 
Mesic: 8 to 15C
Is temperature regime isothermic? ie, do mean monthly temperatures deviate by <6C?: 
No
Soil moisture regime: 
Aridic
Is atmospheric deposition chemistry monitored?: 
No
Landuse: 
Arable
Ecoregion: 
Cool Temperate
Slope (%): 
0-2%
Elevation (m): 
800-1500
Geological material: 
The soil is an Orthic Dark Brown Chernozem (Typic Haploboroll) developed on alluvial lacustrine parent material under native vegetation and short grass species. Surface soils have a loam texture (45% sand, 30% silt, 25%clay) and neutral pH. Subsurface layers are calcareous.
Experimental Design
Design (short description): 
3 crop rotations: (5yr)alfalfa-alfalfa-alfalfa-wheat-barley; (5yr)corn silage-wheat-corn silage-wheat-barley; and the previous 2 rotations in sequence over 10 yr. 4 inorganic P and livestock manure combinations. 3 replicates. Only the corn-based rotation receives N fertilizer (100 kg ha-1). Not all crops are planted each year, but in years 4 and 5 of the rotations the crops are the same (wheat and barley) across all plots.
Number of permanent plots: 
3-10
Soil Classification
soilorder: 
Mollisol
Soil/Data Archive
Data Archive: 
Yes
Vegetative samples archived: 
No
Soil solid samples archived: 
Yes
Samples from multiple depths: 
Yes
Sample frequency: 
>Every 5 years
Year of first sampling for archive: 
1910
Year of last sampling for archive: 
2003
Soil Solid Data
pH and acidity: 
No
Organic Carbon: 
Yes
Nitrogen: 
No
Other macronutrients: 
No
Micronutrients: 
No
Chemical Contaminents: 
No
Water holding capacity: 
No
Bulk Density: 
Yes
Mineralogy: 
No
Soil Water Data
pH and alkalinity: 
No
Dissolved organic carbon: 
No
Other macronutrients: 
No
Micronutrients: 
No
Soil Gas Data
Surface Fluxes: 
Yes
Concentrations belowground: 
No
Vegetation Data
Biomass above ground: 
No
Biomass below ground: 
No
Macronutrient contents: 
No
Micronutrient contents: 
No
Harvest mass: 
No
Harvest nutrient contents: 
No
Soil Biota Data
Macro-invertebrates: Biomass, Densities, Taxonomy: 
No
Micro-invertebrates: Biomass, Densities, Taxonomy: 
No
Microorganisms: Biomass, Densities, Taxonomy: 
No
Molecular biology studies: 
No