Memorizing important facts and figures related to Paper II of UPSC Animal Husbandry and Veterinary Science Optional Subject can be challenging, but there are specific techniques that can help you in this process. Here are some effective strategies to improve memorization:

1. Understand the concepts:
- Before memorizing any facts or figures, it is crucial to have a clear understanding of the underlying concepts. This will help you make connections and provide a framework for memorization.

2. Use mnemonic devices:
- Mnemonic devices are memory aids that help in remembering information. You can create acronyms, rhymes, or visual associations to make the facts and figures more memorable. For example, creating a mnemonic to remember the different breeds of cattle or diseases can be helpful.

3. Chunking:
- Chunking involves breaking down large amounts of information into smaller, manageable chunks. By grouping related information together, it becomes easier to remember. For instance, you can divide the topics into subheadings and focus on memorizing one chunk at a time.

4. Visualization and association:
- Creating mental images or associations can enhance memory retention. Visualize the facts and figures in a vivid manner or associate them with something familiar to you. This technique taps into the brain's natural inclination for visual and associative thinking.

5. Practice active recall:
- Actively recalling information from memory strengthens the connections and improves retention. Instead of simply re-reading or highlighting, try to actively recall the facts and figures without referring to any notes. This can be done through flashcards, quizzes, or practice tests.

6. Utilize spaced repetition:
- Spaced repetition involves revisiting the information at increasing intervals over time. By spacing out your study sessions and reviewing the material periodically, you can reinforce the memory traces and prevent forgetting.

7. Create summary notes and diagrams:
- Summarizing the important facts and figures in your own words can aid in understanding and memorization. Additionally, creating diagrams, charts, or mind maps can help visualize the relationships between different concepts and make them easier to remember.

Remember, it is important to have a structured study plan, allocate dedicated time for memorization, and regularly revise the material to reinforce your memory. Practice these techniques consistently, and you will improve your ability to memorize and recall important facts and figures related to Paper II of UPSC Animal Husbandry and Veterinary Science Optional Subject.