Leopold Center funds 30 new projects for 2006 ; Research confirms link between extended crop rotations, soil quality ; Director column: What are your top priorities? ; Kirschenmann column: Aldo Leopold and 21st Century agriculture ; Burlington forum explores Leopold's Iowa roots ; Southwest Iowa Entrepreneurial Center ; New generation' producer finds new markets ; Advice from distributors: Tell us your story ; Workshop targets niche beef market opportunities ; ISU researchers advice Chinese hoop project ; Team completes external review of Leopold Center programs