after air and water, sand is our most consumed natural resource and is the most widely used aggregate. in fact, we use billon tons of sand each year for building purposes!...
contains extinct plants that have been dated from the silurian (ca. million years ago). [ ] [ ] lycophytes were some ofthe dominating plant species ofthe carboniferous period, and included tree-like species, although extant lycophytes are relatively small plants. [ ] the scientific names and the informal...
grinding machine: when dolomite grinding machine is at work, all the grinding rollers are rolling in the ring, and the materials are driven to the edge ofthe turnplate by the centrifugal force and fall down into the grinding chambers where the materials are repeatedly pressed, crushed and grinded by...
heads are tight and compact. the plants have vigorous leaves which wrap the heads in cooler weather. delicious raw or cooked. ready to harvest in just days from transplanting, this early variety is very well complimented with the standard snowball which produces heads from around days. standard packet...
of about accepted species in the family zingiberaceae that contains such species as turmeric and siam tulip . they are native to southeast asia , southern china , the indian subcontinent , new guinea and northern australia . some species are reportedly naturalised in other warm parts ofthe world such...