The dynamics of leaves area formation in local and introduced varieties of wheat growing in the arid conditions
The formation of the total leaves area of wheat plants during vegetation period in the arid conditions and, as well as the leaf area index (LAI). The hard of arid conditions revealed the reaction of studied wheat varieties to stressful growing conditions. The total of leaves surface was maximal in the earling phase in wheat varieties Volzhskaya 100, Volzhskaya С<sub>3</sub> (light), and in Volzhskaya K (qualitative) and Zafar (standard). The maximum total of leaves surface in the flowering phase is observed.