Jordan Valley is the most important irrigated area for crop production
in Jordan. Deficiency symptoms of micronutrient elements have been ob
served. To appraise the status of hot water extractable B in the soils
of the Jordan Valley, 15 profiles were sampled to represent the vario
us types of soils in the valley. The majority of the profiles studied
contained less than 0.5 mg kg(-1) water-soluble B, which is considered
too low to supply sufficient B for normal plant growth. All the profi
les studied are high in clay content and highly calcareous. These two
factors may have contributed to the low water-soluble B in these soils
. The heavy texture of the soils also led to the fairly uniform distri
bution of B with depth in the great majority of the profiles.