Effects of Site Management Treatments on Growth of 5-year-old, Second-rotation Chinese Fir Plantations EFFECTS OF SITE MANAGEMENT MEASURES ON GROWTH OF 4-YEAR-OLD,SECOND-ROTATION CHINESE FIR PLANTATIONS Effects of Site Management Treatments on Growth of 6-Year-Old,Second Rotation Chinese Fir Plantations IMPACT OF SITE MANAGEMENT ON PRODUCTIVITY OF SECOND GENERATION 1-YEAR-OLD PLANTATION OF CHINESE FIR A Study on the Influence of Site Management Measures on the Growth of 3 year old Cunninghamia lanceolata Plantation of Second generation A Study on the Influence of Site Management Measures on the Growth of Four-year-old Chinese Fir Plantation of Second-generation