Black Jack contains Phosphorous, Potassium, and Sunraysia’s Proprietary Co-factors that work synergistically to offer excellent quality and ROOT Health. Being in effervescent tablet form it readily dissolves in water while offering macronutrients and micronutrients to your crops. With Black Jack measured dose in Tablet form you do not have to measure the nutrients. Tablet ensures that your dose is correct for every application and offers you uniform results and uniform quality produce. Black Jack helps in increasing the ROOT mass of Plants thereby increasing the absorption and nutrition uptake in Plants. Unhealthy ROOTSystem cannot absorb and translocate nutrients to the plants, they also become susceptible to Nematodes and other soil-borne diseases. Phosphorous and Potassium not only provide nutrition to crops but also keeps the ROOTS healthy. A healthy ROOT System ensures faster absorption and translocation of water and nutrients to the plants, thereby increasing Productivity and Yields! Black Jack also improves the soil quality and fertility and provides essential Nutrition to Plants.