Inorganic fertilizers with major nutrients are likely to be contaminated with some micronutrients. Fertilizers, utilized in Saudi Arabia, were analyzed for their total and water-soluble content of Fe, Zn, Mn and Cu. They represented three categories namely: phosphatic, solid multiple nutrient fertilizers (SMNF) and wat …
… lected and analyzed. Soils were found to be characterized by high pH, high CaCO3 content, low or very low micronutrient contents. The unfavorable conditions caused nutrient deficiencies within the plant tissues. To correct the situation, fertilizer use should be based on soil testing and plant analysis, as well as info …
… e, except for a few cases. Leaf nitrogen concentrations were at adequate levels. To minimize the usage of fertilizers, the quantity of N-fertilizer should not exceed 100 kg N per feddan, added as three doses in September, March and June. Phosphorus fertilizers should be added in September and when another dose is neede …
… ive of this study was to evaluate the e ect of a long run application of Kala compost mixed with chemical fertilizer on soil and plant productivity. Soil and plant (mainly cucumber) samples were taken from 12 greenhouses that received Kala compost continuously for the last ve years. No symptoms of physical or chemical …