STANDS IN MANGROVE SWAMPS &9 
TABLE II.—Stand of poles on one hectare in mangrove swamp forest, Port 
Banga area, Mindanao. Average of 6.25 hectares. 
[Data from H. N. Whitford and W. I. Hutchinson. ] 













= mets 
} Average number of poles per hectare. 
| | 
| Pole class. | | aoe ite 
| Baka- Pagat-, Po- ~ Grand| Per 
| Tangal. | Total. laneous | stand 
uan. pat. | totan. isoeeies total. | cent. per 
| | acre 
Small, 6 to 15 em. di- | 
ameter 2.2 ee ee Gti eb 5.44 | 0.64 | 71.35 T92 W3E27 43.5 | 29.65 
Large, 16 to 25 cm. di- | | | 
ameternsse at sae 74.88 | 11.04 7.04; 1.12) 94.08) 1.12 95.20 56.5 | 38.53 
otal. | 182. 63 | 18.56 | 12.48 1.76 | 165.43 | 3.04 168.47 | 100.0 | 68.18 
percents as esse = 78.73 | 11.02 7.41 1.04 | 98.20 80h} 100500) ese |e ees 
| | 


Dr. F. W. Foxworthy has found stands of from 300 to 650 
cubic meters per hectare in large swamps in Mindanao. 
Tables III to V, taken from a report by Ranger Vicente Castillo 
on a virgin mangrove swamp on Basiad Bay in Tayabas Prov- 
ince, give a good idea of the original composition of a mangrove 
swamp. In these tables cords are calculated by allowing 30 per 
cent for air space in stacking. One cord is the equivalent of 3.62 
cubic meters. 
An examination of these tables shows that the stand of timber 
in a virgin forest is comparatively heavy. 
TABLE III.—Stand of firewood 10 centimeters and over in diameter on 
2.8 hectares. Survey applicable to 440 hectares between Mapinghil 
and Poctol Point, Capalonga, Luzon. 
[Data from report by Ranger Vicente Castillo.] 









Species | : 
Species. Trees. Volume. | pe | ese 
| trees. : 
ane: oe wars rs 
j cu. mM. Cords. | Per cent.| Per cent, 
Ie ESE ol ah I as ee | 816 146. 22 58.49 | 45.0 55.6 
(hanani cranalaee ss mec eswee et) SAL Poses iol had | 620 73.33 29. 33 | 34.2 | 27.9 
cleaner aie ee ae FP 257 36. 66 14.66| 142] 13.9 
LUA G1 ees Spee es ne ee ee eae 74 3.90 1.56 4.0 | 1.5 
[sath] etal ae Rie ah ee A 46 | verom 0.88 Dats 20.8 
[Pag supa Lees cn ene Se. aS ee 2 0.55 0. 22 QEis) 0.2 
Ko tal ees ee ete 1, 815 262. 87 105: 14) |ieeees* ee Race ee 
Stand perihectare see ss 0) e382 ss ses 789 114. 29 | 45 TI Ae eee ee Aa 

