Table 2. The changes of weed occurrance(dray weight) after mulching.

Treatment	Days after planting (g/m2)
	0	27	40	54	70
1	0	16.6	105.7	237.8	179.3
2	0	6.17	62.7	156.3	148.2
3	0	1.26	17.9	20.1	39.2
4	0	0	0	0	0
5	0	0	0	0	0
6	0	0	0	0	0

1: non-mulching, 2: a single fold of newspaper, 3: two folds of newspaper,
4: recycled paper(120g/m²), 5: recycled paper(180g/m²), recycled paper(250g/m²).