Primary agricultural ... nature or from the primary sector. Secondary agricultural goods are treated products and preparations from primary agricultural goods. Together, these form the main definition ...

Oil production is separated into three phases: primary, secondary and tertiary, which is also known ... thinning the oil and enhancing its ability to flow. First applied in Venezuela in the ...

Sector analysis reveals which are expanding and which are contracting. In economics, there are four big sectors. They include the primary, secondary, tertiary, and quarternary sectors, each of ...