Why are crop fields known as artificial ecosystem?

More Questions

• Why are crop fields known as artificial ecosystems?
• Why natural ecosystem is more stable than artificial ecosystem?
• What is the strength of magnetic field known as?
• What kind of ecosystem is known as sustainable?
• Why does a farmer rotate crops in the field?
• What is food crops and cash crops?
• What is kharif crop and rabi crop?
• What is electric field and magnetic field?
• What type of fracture is known as greenstick fracture?
• What is the si unit of magnetic field?