Why are the leaves of burr oak turn brown?

The leaves of a burr oak may turn brown due to several factors, including environmental stress, such as drought or excessive heat, which can cause leaf scorch. Additionally, diseases like oak wilt or pests like oak leaf caterpillars can lead to browning and defoliation. Nutrient deficiencies, particularly in nitrogen or magnesium, can also contribute to the discoloration of leaves. Proper care and monitoring are essential to maintain the health of the tree.