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.
Indica vs Sativa. Indica and sativa are both strains of the cannabis weed, also known as marijuana. Typically, it is used as a psychoactive drug in its dried herbal form. Cannabis has got three known species which are sativa, indica and ruderalis. In this article weâll look at the contrasts between the sativa and indica species of the cannabis weed. Sativa plants are just as different in appearance from the Indicas as they are in the chemical composition of the leaves.