Aboriginal society remained mostly unchanged until Europeans arrived in Australia in the 1600's.
It wasn't until the arrival of Europeans (on any continent) did the native people begin to change, taking on and adopting European forms of society.
Answer:
1. It involves risk. In crop rotation, investing in a season involves input of much money to buy different seedlings of the different types of crops to be planted.
2. Improper implementation can cause much more harm than good.
3. Obligatory crop diversification.
Polyester<span> is a thread is made from a plastic compound. Its super cheap to make and that is why it is so widely used.</span>
