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70 ANNEXES Analysis of the agricultural situation in Azraq Basin German-Jordanian Programme “Management of Water Resources” 1.2 – Deep fine mixed calcareous family of Typic Haplocambids*. Occurs in flat to very gently sloping, Qa wadis and some terraces in the aridic moisture regime, precipitation 50-100 cm,the soil is formed on basaltic alluvium and average soil depth is 96 cm, these soils found in Al-Awshaq which represent the old farm in Azraq. When dry the surface is hard to very hard, vesicular and often shows polygon formation with common 0.5-1cm wide cracks. Surface gravel cover is variable from nil to 60%, and a gravelly phase is recognized as a soil type. The topsoils is reddish yellow to strong brown (7.5YR7/6-5/6)strong to moderate coarse to medium sub angular blocky structured, texture is Silty Clay or heavy silty Silty Clay Loam (44.8% Clay, 49.2% Silt, and 6.0% Sand),the topsoil is platy and vesicular breaking to sub angular blocky. Reaction to dilute HCL is strong. Subsoil is strong brown to yellow red (7.5YR5/6-5YR4/6)weak to moderate, coarse to medium sub angular blocky Silty Clay Loam to Silty Loam, (31.2% Clay, 58.2% Silt, and 10.6% Sand) A few CaCO3 concentration can occurs throughout and few gypsum crystals occur in lower subsoil. Gravels normally absent or very low, the deep subsoil can be massive compacted reaction to dilute HCL is strong. These soils is very saline and sodic with Ece 43 and 35 mS/cm in top and sub-soils respectively and ESPs of 15 and 50% respectively, Reaction is slightly alkaline with pH 7.4,If reclaimed fertility would be medium to high with CEC of 20-30 m/100g. inherent fertility is low with Organic Matter about 0.1%, total-N100 respectively indicate a strong k deficiency, CaCO3 contents of about 17% are moderately high and somewhat hazardous and gypsum content of about 3% relatively low but could reduce CEC and AWC, Moisture reserves, if the soil was wetted, would adequate with AWA in the range 110-120 mm/m, low infiltration rates.
Analysis of the agricultural situation in Azraq Basin ANNEXES German-Jordanian Programme “Management of Water Resources” 71 1.3 - Deep fine mixed thermic Family of Typic Calcigypsids*. Soil occurs in flat to gently sloping pediments and terraces of basalts flows on upland are on the upland area the soils formed from on colluvial and alluvial materials derived from basalts in arid zone with a precipitation is
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