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The Crusher Department,manufactures and sells stone crushing machinery The concrete and asphalt products with which we are familiar contain a high proportion of crushed rock and sand...

Agricultural technology | Britannica

Agricultural technology: Agricultural technology, application of techniques to control the growth and harvesting of animal and vegetable products Mechanical processing of soil so that it is in the proper physical condition for planting is usually referred to as tilling; adding nutrients and trace elements is called...