PAR is the acronym for Photosynthetically-Active Radiation, and refers to light with wavelengths of 400 – 700 nm, the so-called visible spectrum, from red to violet. PAR is photosynthetically-active because it...
Light has tremendous effects on crop architecture and its quantity and quality affect internode lengths in cucumber (Cucumis sativus). Kahlen and Stützel make simplifications to a light quantity- and quality-sensitive...