There are many yield-improvement systems but a well known one is crop rotation, where fields would have different crops and be fallow (empty) for a time in between.
The reason for this is that different crops need different nutrients, so the soil would be used to maximum effect. The fallow year would allow the land to recover its minerals and nutrients, so that it would be fully ready to grow more crops.
the water method helpes
The mesopotamins farming system, is like the egyptions. the mesopotamins used irrigation.
sudsistence farming
farming crops
They grew their food by terrace farming.
to grow food
Advances in medicine and farming.
To grow food for people to eat.
A Surplus of food. A Surplus is were you grow food and have a lot!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
farming
because most people practiced on farming and technology. this is how the population became wealthier and this helped with trading.
subsistence farming