Magnitude of Annual Soil Loss from a Hilly Cultivated Slope in Northern Vietnam and Evaluation of Factors Controlling Water Erosion

Table 2

Monthly canopy cover ratio (%) or LAI of the planted plots during the rainy season.

Year	Plot	Land-cover	Apr.	May	June	Jul.	Aug.	Sep.
1st	3, 6	Cassava	NA	8-9	10–12	13–16	22–24	30-31
	8, 9, 11, l2	Cassava	NA	NA	13–15	17–19	24-25	32–34
	2, 5	MG	NA	7-8	12	21-22	26–28	32–35
2nd	8, 10	Cassava	NA	7	12	24	37	53
	9, 11	MG	NA	3–5	5–8	4–9	6–12	6
3rd	6	Cassava	0.05	0.25	1.00	2.25	3.95	5.20
	5	MG	1.32	2.42	1.98	2.28	1.68	NA

  MG: Morning glory.
 Canopy cover ratio (%) was measured in the 1st and 2nd year, while LAI was measured in the 3rd year.
 NA: not available due to before planting in April and May and after harvesting in September.