By R. N. Reddy
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Extra resources for Agricultural Process Engineering
Until you have a little practice it is best to put a tarp on the ground, in case you need to sweep up your mistake and start over. Heavy seed is best winnowed by pouring the seed from one container to another in front of box fan, or alternatively directing the air discharge hose from a vacuum cleaner into a large (16" diameter) mixing bowl. When dealing with large volumes or certain types of seed it is helpful to use mechanical equipment for winnowing. The University of California at Davis has plans for making your own winnowing equipment.
In the Mid-Atlantic and South, frequent and daily thunderstorms and high humidity may playa large role in determining how and when seed is harvested. For example, in dry climates, beans can normally be left to mature and dry in the field, but during wet humid weather, it is best to harvest early and allow the beans to continue maturing and drying under cover. Dry Seed Processing When seeds are ready to be processed, the entire seedpod, capsule, or seed head will become brown and dry. During the maturation process, the ripening pods and capsules change colour from green, to yellowgreen, to yellow, to light brown, to a darker brown, or dark gray.
Processing of cocoa beans at small scale also needs attention. Processing of Medicinal and Aromatic Products The plant based pharmaceuticals, herbal medicines, perfumery, cosmetics, fragrances and food flavour industries have recorded a phenomenal expansion in last 50 years and as a result, this sector figures in high annual growth rate industries in agri-business. The market for plant based pharmaceuticals in the year 1994 was estimated to range between US$ 32-43 billion. The world essential oil production at raw materials level was estimated to be about Rs.
Agricultural Process Engineering by R. N. Reddy