ammar is waste man
most grow a specific a crop.
Humans in Palaeolithic period were hunter gatherers not farmers/crop growers
cash crops like rice tobacco and indigo
Farmers get the majority of their seeds from crop breeders who specialize in producing seeds to grow the plants that farmers grow to sell their crops with. The seeds that farmers keep from the crop they sow often won't be suitable enough to grow again, especially with crop varieties like corn, wheat and canola.
Vietnam's farmers grow cocoa, rice is the most important food crop, followed by corn, cassava, and sweet potato, in that order.
One problem GMO crops pose for farmers who do not grow them is cross pollination of GMOs in non-GMO crops, especially those that are grown organically.
Rainfall and growing season length determine crop production.
The crop that farmers depend on depends on the main crop that each farmer grows. Farmers depend on the crops that bring them the most money to live on, such as wheat, corn, lettuce, tomatoes, or peanuts. Many farmers grow more than one crop so that if one fails they still have another one to fall back on.
How do Spain's farmers grow crops on the Central plateau
Most crops are grown for profits for farmers, not for personal use. Only in the third world countries like most of Africa and India will you find farmers that grow and harvest rice and wheat for their own use.
crop
Farmers in Mesopotamia learned to successfully grow onions by irrigating the crops. Onions were a favorite crop that the Mesopotamians grew along with leeks and lentils.