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The paper presents a synthesis of investigations with 30 inbred lines of maize from different germplasm groups (BSSS, Iodent, Lacaune, Lancaster) and different ma-turity groups as parental forms. The research was carried out at the Institute of Crop Science „Porumbeni”, in the pedoclimatic conditions of 2022. As a result of topcross pollinations, hybrids from 6 maturity groups were obtained, which differ in morphologi-cal characters, productivity and the rate of water loss from the grains. Hybrids from the middle maturity group resulted in a higher productivity, compared to the hybrids from the other maturity groups. The rate of grain moisture loss for the hybrids from middle maturity group is more pronounced compared to early hybrids and is at the same level as late maturity group hybrids.

The article presents the results of studies on the effect of steroid glycosides isolated from the aerial part of plants of the Scrophulariaceae family on the parameters of growth, photosynthetic activity and productivity of spring barley plants, when they grow in the field, in comparison with the wellknown growth regulator Ekostim. [ABSTRACT FROM AUTHOR]

The article presents the results of the studies on the content and accumulation of plastid pigments in various plant organisms of Ingen 93 variety of triticale cultivated after different forerunners in 2014. It is noted that after the following forerunners: grain peas and oats + vetch in stem elongation stage chlorophyll a and b in leaves are much higher than in later phase - ear emergence, which is 15.12 mg/g of absolute dry matter and 9.28 in cereal peas and 13.02 mg / g of absolute dry matter and 8.71 mg / g of substance absolute dry matter after cloves + oats. The organisms of winter triticale accumulate different amounts of chlorophyll - the leaves 44.3-45.9%, the stems - 41.6-43.3% and 12.4% of the quantity represented throughout the plant. Higher level of chlorophyll in winter triticale plants grown after peas has contributed to the formation and higher production growth of 597 kg /ha compared to the forerunner vetch+oat. [ABSTRACT FROM AUTHOR]