Answer:
Jade was used to make art and jewelry, while obsidian was used to make art and weapons.
Explanation: Jade was a very beautiful and sought after gem that was very decorative while obsidian was a very hard, easy to make weapon material. I hope this helps ya.
Innovations in farming techniques that led to great productivity.
1.- <em>Three Point Linkage</em>. Developed by Harry Ferguson, this invention raised or lowered the plough, depending on the depth farmers wanted to dig.
2.- <em>Genetical Modified Corps</em>. Scientist isolate genes with some desirable traits to improve the quality of the plant.
3.- <em>Fertiliser Deep Placement.</em> A new form of fertiliser that increased the Yields.
4.- <em>New Feeding Methods</em>. Blending different components of food to improve the quality of nutrition.
Yeah what question do you need
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