2.2. Experimental layout and treatments
The experimental layout was a randomized complete block design with five treatments and three replicates per treatment. The plot size was 6!5 m. The treatments were: (1) nonfertilized control (treatment A1); (2) fertilized with
14.04 t haK1 of CGCC (5 t organic matter haK1) (treatment A2); (3) fertilized with 28.08 t haK1 of CCGC (10 t organic matter haK1) (treatment A3); (4) fertilized with 8.14 t haK1 of PM (5 t organic matter haK1) (treatment A4), and (5) fertilized with 16.29 t haK1 of PM (10 t organic matter haK1) (treatment A5). Organic wastes were applied to the soil surface on 15 October 1999, 16 October 2000, 17 October 2001, 15 October 2002, and 14 October 2003, and incorporated to a depth of 25- cm by chisel ploughing and disking the day after application.