Urea is a raw material used in the manufacture of many important chemicals, such as: 1  Various plastics, especially the Urea-formaldehyde resins. 2  Various adhesives, such as Urea-formaldehyde or the urea-melamine-formaldehyde used in marine plywood. 3  Potassium cyanate, another industrial feedstock. 4  Urea nitrate, an explosive.
There are many types or strains of marijuana, however they basically fit into two categories; Indica and Sativa.Breeders will often cross strains to change the growing or properties of the original. As a rule of thumb, generally Indicas tend to be shorter, stockier plants with smaller, denser and smellier buds.here are many types or strains of marijuana, however they basically fit into two categories; Indica and Sativa.
Hereâs how to tell them apart. Cannabis is one of the oldest crops known to mankind, with records of its cultivation dating back thousands of years. Today, it is widely accepted that marijuana has two different species: Cannabis indica and Cannabis sativa.ereâs how to tell them apart. Cannabis is one of the oldest crops known to mankind, with records of its cultivation dating back thousands of years. Today, it is widely accepted that marijuana has two different species: Cannabis indica and Cannabis sativa.