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The drying zone moves from the bottom of the bin to the top, and when it reaches the highest layer, the grain is dry. The grain below drying zone is in equilibrium moisture content with drying air, which means it is safe for storage; while the grain above still needs drying. The air is then forced out the bin through exhaust vent.
A swather (North America), or windrower (Australia and rest of world), is a farm implement that cuts hay or small grain crops and forms them into a windrow for drying. Crimper rollers and cutting discs. They may be self-propelled with an engine, or drawn by a tractor and power take-off powered. [1]
1926 threshing machine "The expense of horse labour, from the increased value of the animal and the charge of his keeping, being an object of great importance, it is recommended that, upon all sizable farms, that is to say, where two hundred acres [800,000 m²], or upwards, of grain are sown, the machine should be worked by wind, unless where ...
In modern agricultural practices there are methods of managing under 1% grain loss, but small subsistence farms can see 20% - 100% of grain loss. This causes starvation and an unstable food supply. Grain loss can be caused by mold growth, bugs, birds, or any other contamination. One method of preventing loss is hermetic grain storage.
Grain combine fires are responsible for millions of dollars of loss each year. Fires usually start near the engine where dust and dry crop debris accumulate. [21] Fires can also start when heat is introduced by bearings or gearboxes that have failed. From 1984 to 2000, 695 major grain combine fires were reported to U.S. local fire departments. [22]
Grain bins with dryer unit (center) putting out steam from drying the corn (Click for video) Grain bins typically have grain dryers next to them which heat the grain to lower moisture content before storage within in the bins. Applying too much heat to the grain when attempting to lower moisture content can cause shrinkage which cuts into profits.
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