Table 2.

Growth comparison of pine trees by treatment

	Mean	SD	P (T < t) two-tail
Height for soil (m)	1.412	0.056	0.96
Height for pit (m)	1.412	0.069
Leader for soil (m)	0.307	0.011	0.6
Leader for pit (m)	0.320	0.082
Root collar for soil (m)	0.0266	0.0055	0.01
Root collar for pit (m)	0.0304	0.0055
Age for soil (Whorls)	7.7	2.6	0.9
Age for pit (Whorls)	7.7	1.6

n = 30