Harvesting And Storage

The U.S. soybean crop normally is harvested in September or October. Ideal moisture content for harvesting is 13%, and the crop can be successfully stored at this moisture content until the following summer. Soybeans at <12% moisture can be stored for 2 yr or more with no significant deterioration. Beans with moisture above safe storage limits are dried or placed in aerated bins for gradual moisture reduction.

Soybeans are trucked from the farm to country elevators. From there they are moved by truck or rail to processing plants, subterminal elevators, or terminal elevators. From the terminal elevators, the beans are shipped by rail or barge to export elevators or processors. Soybeans are stored in concrete silos 6-12 m in diameter with heights of > 46 m. The silos are often arranged in multiple rows, and the resulting interstitial silo areas are likewise used for storage. In bulk storage, seasonal temperature changes cause variations in temperature between the different portions of the grain mass (eg, in the winter, soybeans next to the outer walls are colder than those in the center of the silo). Such temperature differences initiate air currents that transfer moisture from warm to cold portions of the seed mass. Thus bulk soybeans originally at safe moisture concentrations may, after storage, have localized regions of higher moisture that cause growth of microorganisms, which in turn can lead to heating. Under these conditions, the beans turn black and may even ignite. Such seasonal moisture transfer also occurs with other oilseeds. In commercial practice the temperature is carefully monitored and, when it rises, the beans are either remixed or processed. Aflatoxin contamination is not a problem as it is with cottonseed and peanuts. Although fungi invade soybeans stored at high moisture and temperatures. Aspergillus flavus does not grow well on soybeans and afla-toxins are negligible.

Sleeping Sanctuary

Sleeping Sanctuary

Salvation For The Sleep Deprived The Ultimate Guide To Sleeping, Napping, Resting And  Restoring Your Energy. Of the many things that we do just instinctively and do not give much  of a thought to, sleep is probably the most prominent one. Most of us sleep only because we have to. We sleep because we cannot stay awake all 24 hours in the day.

Get My Free Ebook

Post a comment