Managing nitrogen

Nitrogen management is important in all wine grapes, but even more so in white varieties because of its association with fruit flavor compounds. But how much nitrogen is needed for adequate levels in fruit, and when should it be applied? Research has shown that nitrogen plays a key role in the grapevine’s canopy growth and development and is a significant component of fruit, said Dr. Joan Davenport during a discussion at the annual meeting of the Washington State Grape Society last fall. But there is also a strong relationship between nitrogen and fruit flavor compounds, particularly compounds found in white […]