Onions require potassium at rates equal to nitrogen, but calcium is required at considerably higher rates. High nutrient availability is important during bulb-formation; in this phase a high K:N ratio is required. Pungency of flavor is enhanced by fertilizers containing S but diminished by N in ammonium form. system is shallow and fibrous, therefore, fertilizers should be applied 10–15 cm below the seed row. Optimum soil pH >6.0. Best onion mineral nutrition regime includes the use of CRFs and foliar feeding. In certain areas fertigation with fully-soluble fertilizers is also practiced.
Agroleaf Power Calcium
Agroleaf Power Calcium prevents and corrects situations of calcium deficiencies. Instances like these are: excess evaporation and calcium sensitive crops such as lettuce, cabbage and fruits.
Agroleaf Power Magnesium
Agroleaf Power Magnesium contains NPK, MgO and SO3. It cures and prevents magnesium deficiencies found in soils like: acidic, light and sand. It also increases photosynthesis and chlorophyll creation. It is great to use for crop recovery, stress relief and cell stretching.