The main objective of this study was to determine spatial variability in a dry onion field in EL-Saff agricultural farming village, Giza Governorate, and to produce a management strategy which is based on spatial variability of yield and soil components. The onion field properties were determined and given in maps. Soil samples were taken to determine properties of soil such as salt (EC), pH, available N-P-K, and onion yield. Longitudinal slope was also measured. Results were used to produce maps. The greatest percentage of the field soils was determined as sand to sandy loam textured soils and loamy sand in lower depth. Their surface is covered with a lot of fine and medium gravel. Yield of dry onion increased with decreasing level of total soluble salts. Available nitrogen, phosphorus and potassium in the field reflected good nutrient power supply of the studied soil as well as onion dry bulbs according to the related maps.