Charcoal-based fertilizers can be improved in quality by nutrient impregnation and modified to provide nutrients gradually (slow release fertilizer-SRF). SRF fertilizer made using a coating the form of charcoal from pyrolysis palm oil waste. Raw waste Bantur District, Malang, East Java, for soaking process with fertilizers, there are two different types namely organic (EM4) inorganic (Urea) aft...

Proppants play an important role to increase oil and gas output in shale development process. Tracers are used study the degree of heterogeneity dynamic equivalence between injection production wells judge state reservoir. However, it is difficult integrate both slow-release tracing supporting functions one material. The functional coated proppants with tracer function great significance. Here ...