Transplantation refers to the process of transferring a plant or plant part from one location to another. It is commonly done in crop production to ensure that plants are grown in the most suitable conditions and to achieve higher yields.

Advantages of transplantation in crop production include:

1. Better plant establishment: Transplanting allows for the controlled and optimal growth conditions for young plants. This ensures that they have a higher chance of survival and establishment compared to direct seeding.

2. Early maturity: Transplanting allows for the early establishment of crops, which can lead to earlier maturity and harvesting. This is particularly beneficial in regions with short growing seasons.

3. Uniformity: Transplanting enables the planting of uniform-sized seedlings, which ensures uniform growth and maturity of crops. This can result in more consistent yields and easier management practices.

4. Weed control: Transplanting allows for better weed control as the young seedlings can be transplanted into weed-free fields. This reduces competition for resources and increases crop productivity.

5. Disease and pest management: Transplanting can help reduce the risk of diseases and pests as seedlings can be grown in controlled environments, such as greenhouses, before being transplanted into the field. This can minimize the exposure to pathogens and pests.

6. Improved water management: Transplanting allows for efficient water use as the seedlings can be placed in moist soil, reducing water stress and increasing water uptake.

Overall, transplantation offers several advantages in crop production, including better plant establishment, early maturity, uniformity, improved weed control, disease and pest management, and improved water management.

Undesirable plants grow with the crops are called weeds.