Influence of stand and site conditions on the quality of digital elevation models underlying New Zealand forests

New Zealand Journal of Forestry Science

Table 4 Percentage of ground returns as a function of slope, crop stand density for the mean non-crop stand density (438 stems ha ^-1 ) and the most common non-crop stand density (0 stems ha ^-1 )

	Non-crop stand density of 0 stems ha^-1				Non-crop stand density 438 stems ha^-1
Slope	Crop stand density				Crop stand density
	250	500	750	1000	250	500	750	1000
0	40	33	30	29	29	23	20	18
5	37	30	27	26	27	20	17	16
10	34	27	24	23	24	17	14	13
15	31	24	22	20	21	14	11	10
20	28	22	19	17	18	11	8	7
25	25	19	16	14	15	8	5	4
30	23	16	13	12	12	5	2	1
35	20	13	10	9	9	2	0.7	0.7
40	17	10	7	6	6	0.7	0.7	0.7
45	14	7	4	3	3	0.7	0.7	0.7

All values are shown for the mean New Zealand rotation length of 28 years. Note that a minimum value of 0.7% was assumed for GR_per as this was the lowest value recorded in the LUCAS dataset.