USDA - ARS
Soft Wheat Quality
Research Unit

Quality Goals


The following tables present desirable ranges for the results of the various wheat, flour, and baking quality evaluations accomplished on the eastern soft wheats harvested in 1995. Quality ranges are presented for flours that may be intended for a contemporary pastry flour and for a flour with somewhat stronger gluten protein characteristics for the production of crackers or for export where utilization will be in various international breads. The stronger protein cracker wheats are not semi-hard wheats. They only have more protein content and should have stronger gluten. All nine main categories in the tables are important. Some categories are more important to individual millers and bakers, depending on their objectives. However, a high quality soft wheat cultivar will satisfy the ranges of all categories. The highest quality cultivars will be within range of as many tests within each category as possible.

Products made using pastry flour include, cookies, cakes, pie crust, donuts, layered pastries, wafers, cones, batters, pancakes, waffles, soup thickeners, muffins, and biscuits. In general, the desirable data ranges for pastry flour represent soft kernel texture, no field sprouting, high milling qualities, medium protein content, low alkaline water retention, high test weight and grain condition, medium protein strength, and baking qualities that are typical of soft wheats having those characteristics. The specific attributes are defined in the tables. These characteristics should be target goals for soft wheat breeders developing pastry quality soft wheats for the eastern United States.

Products made using cracker/export flour include chemically leavened crackers, fermented dough crackers, pretzels, and various international pan and flat breads. In general, the desirable data ranges for cracker/export flour represent medium kernel texture, no field sprouting, high milling qualities, high protein content, medium alkaline water retention, high test weight and grain condition, strong protein strength, and baking qualities that are typical of soft wheats having those characteristics. The specific attributes are defined in the table. These characteristics should be target goals for soft wheat breeders developing cracker/export quality soft wheats for the eastern United States.

Some characteristics, especially protein content, influence other quality characteristics. The various ranges in the table are based on the presumption that all characteristics, especially protein content, are within the desirable range. The specific ranges are for typical wheats grown under typical growing conditions that meet the U.S. #2 grade or better. Test samples that do not meet that standard will usually appear atypical and inferior in many test results. They also are very difficult to evaluate for quality without comparison with a known standard wheat grown at the same location under optimum conditions. Cultivars should be subjected to similar and typical agronomic production practices. They also should be planted and harvested at optimum dates for their location.

Quality Goals:

The quality goals for soft wheat depend upon the desired end use. A pastry flour has different requirements than a flour that is milled for crackers or export. Both types require a wheat with high test weight, no sprouting, and high flour yield, but the pastry flour requires a wheat with soft kernel texture, with medium protein content and strength, and low A.W.R.C. Wheat grown for export or cracker production should have medium kernel texture, with high protein that is stronger than the pastry flour, and with medium A.W.R.C.

 


 
    Category / Method
Pastry Flour 
Desirable Parameter Range
Cracker and Export Flour Desirable Parameter Range
Test Weight / Grain Condition
. .
Test Weight > 58 lb/bu > 58 lb/bu
Shrivelling Factor < 15 % < 15 %
1000 Kernel Weight > 27 g > 27 g
Kernel Size Test Uniform Uniform
SKCS Diameter >2.1 >2.1
SKCS Weight >2.7 >2.7
Field Sprouting
. .
Viscograph (Amylograph) > 500 bu > 500 bu
Alpha-Amylase Activity < 0.08 abs < 0.08 abs
Falling Number > 350 sec > 350 sec
Kernel Texture
. .
Milling, Allis-Chalmers Break Flour Yield 30 - 37 % 25 - 37 %
Milling, Miag-Multomat Break Flour Yield 34-41 % 25 - 41 %
Milling, Quadrumat Sr. Break Flour Yield 32 - 41 % 25 - 41 %
Milling, Quadrumat Jr. Softness Equivalent 53 - 64 % 45 - 64 %
Milling Qualities
. .
Quadrumat Jr. Flour Yield >67.5 % >67.5 %
Quadrumat Sr. Flour Yield > 62 % > 62 %
Quadrumat Sr. Flour Ash < 0.420 % < 0.420 %
Allis-Chalmers Flour Yield > 75.7 % >75.7 %
Allis-Chalmers Flour Ash < 0.430 % < 0.430 %
Allis-Chalmers E.S.I. < 11.5 % < 11.5 %
Allis-Chalmers Milling Score > 52 > 52
Allis-Chalmers Friability > 27.2 % >27.2 %
Miag-Multomat Flour Yield > 71 % > 71 %
Miag Damaged Starch < 3.5 % <3.5%
Miag Flour Ash < 0.500 % < 0.500 %
Agtron Color > 50 Units > 50 Units

 
 
 
Flour Characteristics:
Category / Method
Pastry Flour 
Desirable Parameter Range
Cracker and Export Flour Desirable Parameter Range
Protein Content
. .
Wheat Protein 9 - 11.5 % 10 - 15 %
Flour Protein 8 - 10 % 9 - 14 %
Protein Strength
. .
Mixograph Absorption 52 - 58 % 53 - 59 %
Mixograph Peak Time > 2.0 min > 2.5 min
Mixograph Peak Height > 2.8 mu > 3.0 mu
Alveograph Peak (Overpressure) > 24-38 mm > 30 mm
Alveograph Length (Abscissa) > 106-180 mm > 150 mm
Alveograph Work (Deformation Energy) > 70 - 127 Joules > 127 Joules
Farinograph Stability/Tolerance 2 - 4 min 3 - 7 min
Farinograph Peak Time > 0.75 min > 1.0 min
Farinograph Absorption 51 - 55 % 52 - 56 %
Alkaline Water Retention Capacity
. .
AWRC < 54 % < 58 %
Acidulated Flour Viscosity
. .
MacMichael Viscosity 90-173 cps 150-300 cps
Baking Qualities
. .
Cookie, Wire-Cut Method 10-53 Width 63 - 66 cm 63 - 66 cm
Cookie, Wire-Cut Method 10-53 Height < 8.4 cm < 8.4 cm
Cookie, Sugar-Snap Method 10-52 Width 17.2 - 18.0 cm 17.2 - 18.0 cm
Cookie, Sugar-Snap Method 10-52 Height < 1.65 cm < 1.65 cm
Cookie, Sugar-Snap Method 10-50D Width 48.6 - 52.1 cm 48.6 - 52.1 cm
Cookie, Sugar-Snap Method 10-50D Height < 5.7 cm < 5.7 cm
Cookie Instrumental Hardness < 26.6 kg < 26.6 kg

 
 
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