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Research ArticleOpen accessIn the abstractEvaluation of NPK Fertilizer Content Derived from Wild Plant DiversityKhosi'in, Nur Hidayat, Zulfikri Muhammad, Endang HaryantoThis research has the background of understanding the diversity of wild plants that can produce organic NPK fertilizer that can be utilized by the community. The purpose of this research is to produce NPK fertilizer from wild plants and to determine the nitrogen, phosphate, and potassium content in the organic fertilizer derived from wild plants. The type of this research … …OnLine Journal of Biological Sciences, Vol. 25, Issue 2 · 20 Jun 2025 · 4,225 accessesView PDFCite
Review ArticleOpen accessIn the abstractAbout HelicoptersRelly Victoria Petrescu, Raffaella Aversa, Bilal Akash et al.A helicopter is a type of rotorcraft in which lift and thrust are supplied by one or more engine-driven rotors. In contrast with fixed-wing aircraft, this allows the helicopter to take off and land vertically, to hover and to fly forwards, backward and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft would … …Journal of Aircraft and Spacecraft Technology, Vol. 1, Issue 3 · 9 Sep 2017 · 15,671 accessesView PDFCite