Wheat Stress Data from Agroecological Resource Area (ARA) Database

WHTSTRESS.DAT

This file contains output from a modified version of the Versatile Soil Moisture Budget. References: De Jong and Bootsma (1988); De Jong et al. (1991a).

One record per year per ARA per rotation.

Item Name Description Reporting Units
ARANO ARA Number  
PROV Province  
ROTATE Indication of Rotation System
- continuous, stubble or fallow
 
AWHC Available Water Holding Capacity
- One of 100, 150, 200 or 250 mm.
- See definitions in FORARID.DAT.
 
YEAR Year  
LDSPRFROST Last Date of 0 degree C Spring Frost Julian day #
LDSPRFROST-2 Last Date of -2 degree C Spring Frost Julian day #
FDFALFROST0 First Date of 0 degree C Fall Frost Julian day #
FDFALFROST-2 First Date of -2 degree C Fall Frost Julian day #
SEED Seeding Date for Wheat
- observed data on "date when seeding is general" (Statistics Canada)
Julian day #
HEADING Calculated Heading Date for Wheat
- calculated with the biometeorological time scale of Robertson (1968)
Julian day #
HARVWHT Calculated Harvest Date for Wheat
- Robertson (1968)
Julian day #
HARVBAR Calculated Harvest Date for barley
- Williams (1974)
Julian day #
TTLH20SEED Total Available Water at Seeding mm
H20SEED1ZN Total Available Water at Seeding in 1st zone
- (Available water-holding capacity of the 1st zone is 5% of the AWHC)
mm
TTLH20HEAD Total Available Water at Heading mm
TTLH20HARV Total Available Water at Harvest mm
H20DIFHTOS Change in Soil Water Content Between Previous Year's Harvest Date
and Current Year's Seeding Date
(approx. 9 months)
mm
H20DIFSTOH Change in Soil Water Content Between Current Year's Seeding and Harvest Dates mm
PRECIPH7 Accumulated Precipitation at Harvest + 7 days mm
PRECIPH14 Accumulated Precipitation at Harvest + 14 days mm
PRECIPH21 Accumulated Precipitation at Harvest + 21 days mm
PRESCROP Present Crop (W=wheat, F=fallow)  

N.B. The following data pertain to the time period from the previous year's harvest to the current year's seeding date.

Item Name Description Reporting Units
ACCPRECIP Accumulated Precipitation (rain + snow) mm
ACCPRESNOW Accumulated Precipitation (snow only) mm
POTEVAP Accumulated Potential Evapotranspiration mm
ACTEVAP Accumulated Actual Evapotranspiration mm
RUNOFFRS Accumulated Runoff (rain + snow) mm
ACTDRAIN Accumulated Drainage mm
ACCSRUN Accumulated Snow Runoff mm
ACCSINFIL Accumulated Snow Infiltration mm
ACCSBLOWN Accumulated Amount of Snow Blown Away mm

N.B. The following data pertain to the time period from the current year's seeding date to the current year's harvest date.

Item Name Description Reporting Units

* N.B. PRECIPFAL and PERPREFAL variables contain no data for fallow rotation.

ACCPRECIPR Accumulated Precipitation (rain only) mm
ACCPOTEVAP Accumulated Potential Evapotranspiration mm
ACCACTEVAP Accumulated Actual Evapotranspiration mm
ACCRUNOFFR Accumulated Runoff mm
ACCDRAINR Accumulated Drainage mm
ACCSTRESS Accumulated Stress
(1 - ACTEVAP/POTEVAP)
 
ACCSTRESSJSD Accumulated Stress Jointing to Soft Dough  
PRECIPFAL* Precipitation During Previous Fallow Year mm
PERPREFAL* Percent of Precipitation Retained During Fallow Period  
WTHRFILE Name of Weather File (AGMET)
For Internal Use Only