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Table 1 Characteristics of the three Agroecology indigenous agroforestry systems in the Tigray Region, Northern Ethiopia

From: Tree diversity and carbon stocks in agroforestry systems in northern Ethiopia

Characteristics

Lowland

Midland

Highland

Altitude (m a.s.l)

1300–1500

1930 to 2500

1,800 to 3,250

Mean annual rain falls (mm)

400 to 600

397 to 903

478 to 956

Average minimum and maximum To (oC)

14.3 to 29.9

11.1 to 28.0

10.2 to 22.5

Dominant soil type

Cambisols

Leptosols

Leptosols

Textural Class

Sandy loam

Sandy loam

Sandy loam

Average pH ± sd

7.9 ± 0.4

7.3 ± 0.5

7.3 ± 0.4

Mean size of farms studied (ha) ± sd

1.62 ± 0.76

0.89 ± 0.78

0.76 ± 0.49

Major trees

Ziziphus spina-christi, Acacia etbaica; Acacia seyal

Faidherbia albida, Eucalyptus camaldulensis, Faidherbia albida, Acacia saligna

Eucalyptus globulus, Acacia abyssinica, Acacia saligna, Olea a fricana, Psidium guajava,

Major food and cash crops

Zea mays, Sorghum bicolour, Eragrostis teff, Linum usitatissimum and Eleusine coacan

Triticum aestivum, Eragrostis teff, Zea mays, Eleusine coacana

Hordeum vulgare, Triticum aestivum and Zea mays