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Effect of systematic straw application on humus content and nitrogen pool of soil - LTSE

Location:
Chelyabinsk NIISKH
Chelyabinsk, 456404
Russia
Latitude: 54.515000
Longitude: 60.302000
Background
Continent: 
Asia
Year LTSE Began: 
1971
On-going or Terminated?: 
On-going
Comments: 
It was grain-fallow rotation on the site before 1971
Environment
Annual Precipitation (mm): 
400-800
Mean Annual Soil Temperature (C): 
Cryic/Frigid: <8C
Is temperature regime isothermic? ie, do mean monthly temperatures deviate by <6C?: 
No
Soil moisture regime: 
Udic
Landuse: 
Arable
Ecoregion: 
Cool Temperate
Experimental Design
Design (short description): 
Number of plots - 64. 1 replicate - 16 plots. 3 replicates.4 N applications and 4 straw applications. N rates: 0, 60, 120,180. Straw and stubble: 1.Straw and stubble are removed 2.Straw is removed, stubble is ploughed up 3.Straw and stubble are ploughed up 4.Straw and stubble are burned up. Rotation: continuous spring wheat
Permanent plot area (square meters): 
1000-3000
Number of permanent plots: 
>20
Soil Classification
soilorder: 
Other
Soil taxa (ex, Great Group of Soil Taxonomy): 
Russian classification: Soil cover includes middle leached chernozem - 69,2% of the area high leached chernozem - 20,3% (as spots), slighty leached chernozem - 8,0% podzolized chernozem - 1,9%, humus horizon depth - 70-100 cm Parent material - loess sandy sediments Profile description A plow (0-27), arable wet, dark-grey colour, fine granular structure, silty loam, compact, densily pierced by roots, distinct transition A1 (27-47), dark-grey, cloddy-subangular structure, silty loam, slighty compact, piersed by roots, distinct transition B (47-75) wet, brownish dark-grey colour, subangular structure weakly granular , silty loam,slighty compact,piersed by roots, gradual transition BC (75-103) wet, greyish brown colour, silty loam, subangular structure, compact, piersed by roots,carbonate pseudomycelium, gradual transition C 103 and deeper wet, grey-brown, loamy, cloddy-prismatic structure,carbonate pseudomycelium. Effervescence line 83 cm Rooting layer depth up to 80 cm
Soil/Data Archive
Data Archive: 
Yes
Vegetative samples archived: 
No
Soil solid samples archived: 
No
Samples from multiple depths: 
Yes
Sample frequency: 
Every 5 years
Year of first sampling for archive: 
1971
Soil Solid Data
pH and acidity: 
Yes
Organic Carbon: 
Yes
Nitrogen: 
Yes
Other macronutrients: 
Yes
Micronutrients: 
Yes
Water holding capacity: 
Yes
Bulk Density: 
Yes
Soil Water Data
pH and alkalinity: 
Yes
Dissolved organic carbon: 
Yes
Vegetation Data
Biomass above ground: 
Yes
Macronutrient contents: 
No
Micronutrient contents: 
Yes
Harvest mass: 
Yes
Harvest nutrient contents: 
Yes