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Every time the work of dragging the threshing board is repeated, the grain is stirred again, moving more straw to the edge of the threshing floor. If too much grain is spread on the ground, it has to be raked and swept in order to make a round mound and, if possible, to remove as much straw as possible.
This was done because steel was then a much more expensive commodity than iron. Modern blades are sometimes laminated, but for a different reason. Since the hardest steel is brittle, a layer of hard steel may be laid between two layers of a milder, less brittle steel, for a blade that keeps a sharp edge well, and is less likely to break in service.
[citation needed] The higher gluten and protein properties of these hard wheats offered better bread-making qualities than the soft wheat varieties. [9] U.S. commercial millers initially significantly discounted the hard wheats because the white endosperm that customers preferred could be more easily sifted from the soft wheats. [10]
Straw is an abundant agricultural waste product, and requires little energy to bale and transport for construction. For these reasons, straw bale construction is gaining popularity as part of passive solar and other renewable energy projects. [3] Wheat straw can be used as a fibrous filler combined with polymers to produce composite lumber. [4]
Producing split straw of sufficient length was the key technical innovation making OSSBs possible. OSSB is thus sometimes referred to as oriented split straw board. [4] Formaldehyde free resin is added to the straw and the fibres are oriented for strength and appearance, and shaped into a mat through directional mat forming.
The dull halogen light. The spinning glass plate. The humming that terminates in a “BEEP.” Today the sights, sounds, and smells of the microwave oven are immediately familiar to most Americans.