Give one word for the following
(a) Farming without the use of chemicals as fertilizers, herbicides and pesticides is known as ___.
(b) Growing of wheat and groundnut on the same field is called as ___.
(c) Planting soya bean and maize in alternate rows in the same field is called as ___.
(d) Growing different crops on a piece of land in pre-planned succession is known as___.
(a) Organic farming
(b) Mixed cropping
(c) Inter cropping
(d) Crop rotation