Features of Goodly Calcium: 1. Contains a variety of trace elements, ''Si'' is the major element and calcium, magnesium and boron as adjuvant, thoroughly supplementing essential nutrients which are usually deficient in base fertilizers.2. ''Non-silicate slag fertilizer'', and free from doubt about metal safety tests. It's safety material that developed with patent nanotechnology, allowing increased agricultural food safety.3. Facilitates plant development and extending in roots, increasing nutrient-absorption, soil-holding, stem toughness and reducing outside damage.