Theory:

In a sentence, sometimes more than one word is required to explain the subject. When some words come together before a noun, to explain the noun better, the group of words is called a Noun Phrase. A noun phrase does exactly the work of a noun.
Example:
The subject "mango" is described as:
 
mango.jpg
 
A mango.
A sweet mango.
A sweet Alphonso mango.
A ripe sweet Alphonso mango.
A big, ripe, sweet Alphonsomango.
Noun phrases from the lesson:
  1. Foreign fruit chilli.
  2. A long green chilli.
  3. Locally grown food.
  
Order of noun phrases: Before the head of a noun phrase, determiners (a, an, the, some, many etc.) come first, then adjectives (long, short, happy, strong etc.), then nouns acting as modifiers, and finally the subject being described.
Example:
1. Long, a, chilly, green - A long green chilly.
2. Potatoes, many, long - Many long potatoes.
3. Lot of, children, small, a - A lot of small children.
4. Merchants, some, rich - Some rich merchants.
5. Commonly, most, used, spice - Most commonly used spice.