It covers 77% of the country and receives less than 150 mm per an.La Saharan zone, immense, covers the remainder of the country. thorny vegetation and perennial herbaceous carpets are becoming increasingly rare as we advance towards the north and northeast. No culture are possible except in Koris in the center, where gardening is practiced, and the oases of dal1s Kaouar and Djado northeast. The temperature this very extreme scored: very hot day and very cold at night.

Practices: oisiennes crops: The agricultural practice selimite gardening, cultivation of date palm and citrus Ll'eau is manually pulled with puisettes catch basins to irrigate crops, or with "Chadouf and / or animal-drawn Dalou's area. culture are oases.

dry arid Sahel

It covers 10% of the country and receives 350 to 600 mm per year and is constituted of a forest-steppe; Livestock is kind of transhumance; in this zone, cereal production are random Humidity decreases eastward and especially to the north. Marked by a thorn steppe vegetation and acacia trees, it remains the livestock favorite region. She gradually gave way to the Sahara which it is separated by the northern limit of crops under rain band poorly defined that substantially follows the 16th parallel, with a shift east-southeast.

Practices: rainfed crops: cereals (millet, sorghum, rice) Legumes (Dragonsly) against-season crops: market gardening and fruit trees

dry arid Sahelo-Saharan zone

Represents 12% of the land area. It receives 150 to 350 mm of rain per year. Its canopy consists of a sparse shrub steppe with abundant grass for grazing;

Practices: oisiennes cultures: gardening, date palm, citrus Using sump water for irrigation manually with puisettes, "Chadouf and / or Dalou animal drawn storm crops: cereals, legumes

plains Sudano-Sahelian Zone

It represents approximately 1% of the total area of the country. The Sudanese zone, bounded on the north by a line from the 15th degree of latitude west to just below the 14th degree east. This is the wettest part of the country with more than 600 mm per year. The humidity is increased in the southwestern tip that receives up to 870 mm (Gaya). Agricultural region, she knows, next to a savannah vegetation, millet crop, sorghum, maize and groundnuts.

Practices: Cultures essentially pluiviale; Sone favorite cereals and legumes and tubers (cassava, sweet potato)