Which of the following procedures are followed in dairy farm management ?
(i) Regular inspections and visits by veterinary doctors.
(ii) Usage of manure to increase copy yields.
(iii) Adequate environmental condition is provided.
(iv) Weeding away unproductive and harmful plants from the brood house.

Options

A. (i) and (ii)
B. (i) and (ii)
C. (iii) and (iv)
D. All of these

Explanation

To determine which procedures are followed in dairy farm management, let's analyze each option provided:

1. **Regular inspections and visits by veterinary doctors**: This is a crucial practice in dairy farm management. Regular veterinary check-ups ensure the health and well-being of the animals, which directly affects milk production quality and quantity. Thus, this procedure is **correct**.

2. **Usage of manure to increase crop yields**: While manure is indeed used in agriculture to enhance soil fertility and crop yields, it is not a direct practice of dairy farm management. Dairy farming focuses primarily on animal health and milk production rather than crop yield. Therefore, this procedure is **incorrect** in the context of dairy farm management.

3. **Adequate environmental condition is provided**: Providing a suitable environment for dairy animals is essential. This includes proper ventilation, temperature control, and adequate shelter to ensure the animals are comfortable and healthy. Hence, this procedure is **correct**.

4. **Weeding away unproductive and harmful plants from the brood house**: This practice is more relevant to agriculture than dairy farming. In dairy management, the focus is on animal care rather than plant management. Therefore, this procedure is **incorrect**.

In summary, the correct procedures followed in dairy farm management are:
- **(i)** Regular inspections and visits by veterinary doctors (Correct)
- **(ii)** Usage of manure to increase crop yields (Incorrect)
- **(iii)** Adequate environmental condition is provided (Correct)
- **(iv)** Weeding away unproductive and harmful plants from the brood house (Incorrect)

Thus, the correct answers are **(i)** and **(iii)**.