When is nitrogen removed when harvesting crops?

What is the Bloodgood Japanese Red Maple trees envornment? How can blueberry irrigation be optimized for maximum yield and quality? Do all coniferous hold there needles and if not which type of coniferous needles fall? What is the name of bristle on certain grasses? How can I protect my fence from damage caused by a weed eater? How can I protect pansies from frost? Why is my rubber tree dying and how can I save it? The plant that provides us with flour is? What is the season for delphinium? Why use chloroform in DNA extraction for plant? How often do sour wood trees bloom? What type of soil do cranberries grow in? How can I successfully grow rhubarb in the south? Why is my clay pot turning white? How big can a cork oak tree get? How can leachate be effectively managed and utilized in composting processes? What kinds of trees grow in New Mexico? Where can sundews be found? How are toxic wastes managed by plants? Where is stinkwood grow?