Soudage et Oxycoupage à l'arc électrique Électromécanique des Systèmes Automatisées-ESA-OFPPT-PDF

Soudage et Oxycoupage à l'arc électrique  Électromécanique des Systèmes Automatisées-ESA-OFPPT-PDF
Soudage et Oxycoupage à l'arc électrique  Électromécanique des Systèmes Automatisées-ESA-OFPPT-PDF

Soudage et Oxycoupage à l'arc électrique   ESA-OFPPT-PDF

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Artificial pepper tree

Family: ancardiaceae.

- Origin: south america.

- Small tree up to 8 to 10 m tall, with evergreen and hanging branches. Dioecious species.

- Alternate leaves, bet or imparipinnate, from 20 to 30 cm, leaflets from 3 to 5 cm.

- Flowers axillary inflorescences in conical panicles; yellow flowers - dialypetal.

- Fruits: red drupes of the loftiness of a grain of pepper.

- Clear smell of pepper from leaves and organic products.

- Multiplication: standard sowing; rejects strain.

- Decorative species, in particular thanks to its organic products; can be used even in arid regions (150 to 300 mm).

5. Atriplex. nummularia linidl

Depiction: erect, branched shrub up to 3 m tall.

Bark: yellowish white.

Leaves: alternate greenish gray, suborbicular or rhomboid forms with full margin or toothed sinuate.

Inflorescences: dioecious species, the flowers of male individuals are arranged in aphyllous spikes grouped in terminal panicles, 5 sepals and stamens.

The female flowers in leafy clusters grouped in terminal panicles. Female flowers without petals or sepals. Pistil surrounded by rounded, cordiform fructiferous valves with whole margin or denticulate.

Repair area: Australia.

Bioclimates: arid. Subhumid; hot to temperate variations.

Soils: marly clay, salty hydromorphs, limestone soils with slight encrusting.

Use: fodder foliage appreciated by livestock, fairly rich in proteins (1 kg = 0.20U.F).

6. Pinus halepensis Mill.

Aleppo pine

Family: pinaceae

Botanical depiction: tree 20-25 m high up to 1.2-1.5 m in diameter. Trunk in addition to at least flexible, branches irregularly distributed. Bark gray and smooth in young subjects, becoming cracked, scaly with age, with brown-red rhytidoma.

Standard fasciculate needles 2, 6 x 10 cm long, 1 mm in diameter, light green in color, persistent for 2 years, with a finely denticulate margin, the apex abruptly attenuated in rigid point. Male oblong - reddish catkins, 6-7 mm yearns, fasciculate under the terminal bud. Flower solitary females, emerging at the ends of the branches of the crown, reddish, giving development of oblong, conical, acute cones, 8-12 cm, briefly pedunculate, spreading or reflected, reddish brown tending to become gray with age; scales with an almost white escutcheon, weakly faired across, with an obtuse umbilicus at focus. Seeds gray speckled on one side, 5-7 mm with wings 4 times in addition to long.

Flowering: early spring; fruiting summer - autumn of the following year.

Juvenile state: seedling with 6-9 cotyledons. The needles are first isolated, without sheath, glaucous green.

Origin: circum - Mediterranean.

Bioclimates: appears in isolated feet in the arid upper bioclimat up to the humid stage. Ideal: semi-arid bioclimate in cool winter.

Variants: a particularly abundant species in the cool winter variant where most of its stands are found. But can be found in warm, sweet, temperate variants. It is largely eliminated from the cold variant.

Rainfall: 220-1000 mm; ideal 450-500 mm. In well-watered regions, prefer warm, well-drained stations.

Temperature: the minimum average of the month in addition to cold is not less than 0 ° C. absolute minimum: 15 ° -18 ° C provided that the cold is short-lived.

Wind: fears spray and Atlantic mists.

Soil: indifferent species, prefers marly-limestone soils, supports calcareous and even gypsum crusts. Fears hydromorphic soils as well as low retention soils (deep sands).

Use: rustic and plastic substance, accepting all kinds of soils, even very calcareous, Aleppo pine has been and is used very frequently in reforestation. There is a tendency today to restrict child employment, since its growth is quite slow. It rarely gives the yield of 4 m 3 / ha / year required for creative reforestation. In the good stations where it reaches this threshold. It can generally be replaced by embodiments in addition to productive.


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