Table 3. Effects of consecutive monoculture on N, P and K contents in R. glutinosa.

Days after planting	Years of cultivation	N (mg/g)	P (mg/g)	K (mg/g)
70	One-year1)	14.3a	1.86a	3.89a
	Two-year2)	15.4a	2.00a	3.17b
95	One-year	11.3a	1.51a	3.19a
	Two-year	6.80b	1.66a	2.00b
110	One-year	12.7a	2.16a	2.87a
	Two-year	10.8b	1.77a	2.61b

Note: Different letters show significant differences at the 5% level according to its p-value between R. glutinosa samples harvested on different length of time after planting for one-year monoculture¹⁾ and two-year consecutive monoculture²⁾ by Tucky's test (n = 10, P≤0.05).