High yielding varities of seeds are used in ____________. 

There are _______ types of intensive subsistence agriculture. 

___________ is one in which the farming areas consume all, or nearly so, of the products locally grown. 

___________ was introduced by the Europeans. 

The production of vegetables for sale in the market is called __________. 

___________ is known as pastoral nomadism. 

___________ needs a large labour force to look after the cattle. 

In _________, the aim is to get higher yields per unit area. 

Crops and livestock are raised together on the same farm in ___________. 

Subsistence agriculture can be grouped in ___________ categories.