Production of vegetable crops under calcareous soil faced many problems, such as soil salinity and
sodicity. Three sulphur amendment levels (SAL) with (0 (control), 4, and 6 ton/ha) was applicated to
study its effect on reclamation of this soil and produce squash crop during 2 successive seasons of
winter and spring (2012-2013). The contents of soil nitrogen (N), phosphorus (P), potassium (K), pH,
electric conductivity (EC), and organic matter (OM) in 2 soil depths ((0-15) cm and (15-30) cm) was
measured as the efficacy parameters of the soil reclamation. The results indicated that SAL 6 ton/ha
gave the best results and significantly decreased soil EC (57.54% and 51.51%) and pH (4.67% and
2.83%) respectively in (0-15) and (15-30) cm soil depth compared with the control. Moreover, the
contents of N, P, K, and OM of the soil increased (16.0% and 68.50%), (29.20% and 26.29%), (14.61%
and 15.85%), and (3.99% and 7.60%) respectively in (0-15) and (15-30) cm soil depth. These results
affected in increasing of squash yield significantly 9.39 ton/ha in winter and 6.11 ton/ha in spring.