Perennial Crops

The branch of agriculture that deals with the utilization of biology / biological systems along with engineering to solve problems and make, modify or improve products as well as organisms for agricultural upliftment.

Those crops which have a woody stem are known as woody crops. For Example: Hibiscus, Pine, Oak.

The unwanted grasses or plants that grow in a cultivated area, it is known as weed. It also refers to the plants that hinder the growth of the main crop such as chenopodium album,bidens pilosa, amaranthus spp in maize.