Identification of nutrient deficiency in maize and tomato plants by in vivo chlorophyll a fluorescence measurements / Mohamed Hazem Kalaji...[et al.]. -- grafy, ilustr. -- Bibliografické odkazy. In: Plant Physiology and Biochemistry. -- ISSN 0981-9428. -- Vol. 81, (2014), s. 16-25. http://dx.doi.org/10.1016/j.plaphy.2014.03.029 kukurica * rajčiak jedlý * chlorofyl a * fluorescencia * živiny