Answer the following question with complete details:
Examine the passage carefully and provide answers to the questions:
Vikram is planning to start a commercial poultry farm. He wants to raise both egg-laying birds and broilers. He knows that the birds can get diseases if hygiene is not maintained, and that proper feeding is important for growth and egg production. He also wants to improve the breed quality for higher yield.
i. Which method helps in improving poultry breeds for better production?
ii. What management practices are required for layers to ensure good egg production?