from English Grammar Today. Efficient and effective are adjectives. We use efficient to describe something or someone that works in a quick and organised way: The new online banking system offers a convenient and efficient way to check your account. [extract from a reference for someone applying for a job]
Main Disease. Oak wilt is caused by the fungus Ceratocystis fagacearum which develops in the outer sapwood of the tree. The infected tree reacts by developing tyloses and gums which subsequently restrict the flow of water and nutrients in affected vascular tissues with the result that the tree wilts and subsequently dies (French & Stienstra, 1980). Host Range.
Oaks regenerate from acorns and stump sprouts. They do not produce many seeds compared to other tree species. Acorns decompose quickly if they become wet. White, swamp white and bur oak acorns begin to develop in the fall after they drop from the tree. Northern red, black and northern pin oak acorns begin to develop during the spring after they drop from the tree. Oaks can survive in low light when they first begin to grow, but they need more sunlight as they grow larger.