Table 2. Essential oils yields, origins, latitudes and longitudes of ten Algerian P. halepensis.

Areas		Samples	Regions	Latitudes	Longitudes	Altitudes	Essential oil yields (%)
Littoral	Area 1	S1	Nedroma	34° 52′ 38″	1°14′ 25″	650 m	0.14
		S2	Hwanet	34° 58′ 13″	1°48′ 10″	650 m	0.20
		S3	Oued Tlala	35° 03′ 51″	1°44′ 59″	197 m	0.40
		S4	Bab Taza	34° 58′ 13″	1° 45′ 16″	662 m	0.22
		S5	Bab El Assa	34° 58′ 08″	2° 01′ 40″	537 m	0.63
		S6	Sidi youchaa	35° 06′ 55″	1° 46′ 47″	111 m	0.30
		S10	Ghazaouet	35° 05′ 59″	1° 50′ 59″	118 m	0.40
Mountain	Area 2	S7	Agadir	34° 53′ 21″	1° 18′ 06″	914 m	0.13
		S8	Amieur	35° 01′ 59″	1° 15′ 20″	706 m	0.14
		S9	Mansourah	34° 52′ 27″	1° 19′ 11″	983 m	0.35