CHRISTIAN DARKIN / SCIENCE PHOTO LIBRARY CHRISTIAN DARKIN / SCIENCE PHOTO LIBRARY
Inorganic NPK fertiliser, computer artwork. NPK fertiliser contains the plant nutrients nitrogen, phosphorus and potassium (whose chemical symbol is K). The 5-10-5 on the bags refers to the ratio of these nutrients in the fertiliser. In this case, the fertiliser contains 5% nitrogen, 10% phosphorus and 5% potassium.
Model release not required. Property release not required.