Chemical Fertilisers poster by Martyn F. Chillmaid/science Photo Library. Our posters are produced on acid-free papers using archival inks to guarantee that they last a lifetime without fading or loss of color. All posters include a 1" white border around the image to allow for future framing and matting, if desired.
Chemical fertilizers. Samples of different chemical fertilizer mixtures. The main elements required by plant life are nitrogen (N), phosphorus (P)... more
Chemical fertilizers. Samples of different chemical fertilizer mixtures. The main elements required by plant life are nitrogen (N), phosphorus (P) and potassium (K). Supplements based on compounds that contain these elements are referred to as NPK fertilizers. Different ratios, and additional trace elements, are used depending on the crop and soil. Clockwise from far left, the N:P:K ratios are: 15:5:20, with 2 parts magnesium (Mg) and 3 parts sulphur (S); 15: 30:15, with trace elements (commercial Miracle- Gro mixture); 12:10:27 with added sulphur, iron (Fe) and maganese (Mn); 1:1:1; and 16:8:13 with 2 parts Mg (tomato fertilizer).
About Martyn F. Chillmaid/science Photo Library
Science Photo Library (SPL) is the leading source of science images and footage.
Sourced from scientific and medical experts, acclaimed photographers and renowned institutions, our content is unrivaled worldwide.
Outstanding quality, accuracy and commitment to excellence are deeply embedded in our DNA.
Science Photo Library inspires creative professionals and delivers engaging content of the highest quality for a wide range of clients in a variety of sectors.
Visit sciencephoto.com for more information and stay connected on Twitter, LinkedIn, Instagram and Vimeo.