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aboveground acreage Agricultural agus animal manure Argenteuil aspara asparagus beds asparagus beetle asparagus crowns asparagus is grown asparagus is shipped asparagus plant asparagus rust Asparagus shoots blanched bunches California color commercial cover crop crate crop crowns are planted crowns are set cultivation cutting season Cutworms develop diseases dust early field fleshy roots furrows Fusarium Wilt garden symphylan germination grades green aspar green asparagus growers harvest Heavy soils important injury insects Intercropping knife large plantations larvae legume light sandy malathion manure Martha Washington Mary Washington nitrate of soda nitrogen obtained old asparagus old beds overwinter paragus percent planted to asparagus planting distances pounds per acre practice production profitable reserve food resistant ridges rotenone rows seed seedlings siderable soaked sodium sodium chloride spears spores spray spring stalks temperature Thrips ting tion tips top growth toxaphene tying Washington varieties water per acre weeds weeks yields