There are several types of nano fertilizers, including: - Nano-encapsulated fertilizers: These involve nutrients encapsulated within nanoparticles that release nutrients slowly. - Nanocomposites: These are a combination of nanoparticles and traditional fertilizers, enhancing the effectiveness of the nutrients. - Nanoscale micronutrients: These provide essential micronutrients like zinc, iron, and copper in nanoparticle form, which are more readily absorbed by plants.