Consider the following statements :
1- Organic farming is a farming system with maximum or substantial use of chemicals as fertilizers, herbicides, pesticides etc. and with a maximum input of organic manures, recycled farm wastes, and bio-agents, with healthy cropping systems.
2- Mixed farming is a system of farming on a particular farm, which includes crop production, raising of livestock etc.
3- Mixed cropping is growing of two or more crops simultaneously on the same piece of land.
4. Growing two or more crops in definite row patterns is known as crop rotation.
Which of the statements given above are correct?