Complex sentence: The most successful breed raised in early 19th century was the Spanish breed of Merino, in view of its good wool quality though it was not good as a meat and not adjusted to the wet climatic conditions.
Split into simpler sentences: The most successful breed raised in the early 19th century was the Spanish breed of Merino. However, though its wool quality was good, its meat was not good, and the breed was not adjusted to the wet climatic conditions.