Photosynthesis is the main component in the formation process of vegetative and generative organs in plants, it ultimately provides a certain level of winter barley productivity. Defining the leaf surface area and photosynthetic potential of winter barley crops sown at different dates, with different sowing rates after sunflower allows to determine more effectively the parameters of plant productivity formation.

It is known that photosynthesis intensity is determined by leaf surface assimilation area, which in turn depends on growing conditions. That is why leaf surface size and leaf activity duration are crucial for determining the intensity of dry matter accumulation in plants.