Abstract:
This study was conducted in un cultivated Shambat area, Khartoum Bahri, south of college of Agricultural Studies, Sudan University of Science and Technology during(April to May, 2016),to estimate the soil seed bank in this area. The soil data were collected from area mention above. The distances between samples were equal (10x10 meters) at a depth of (10 cm) and a diameter (8 cm), and the number of samples (25), and the weight of each sample (1) kg. The samples were taken to plant pathology lab in department of plant protection, college of Agricultural Studies, Sudan University of Science and Technology, then the sample mixed with each other and screened sieve (2) Mesh and fragmentation to (5) parts, and then was extracted weed seeds directly by washing with water in sieves graded diameters (2 0.2) mesh, the vital weed seed was tested by calcium chloride. The results showed that, the most dominant species identified was Trianthema
portulacastrum(34%), followed by Cynodon dactylon(13.4%), Ipomoea cordofana(11.9%). Also the number of live an
