Weeds – plant species from the spontaneous flora, who without man’s desire, vegetate and develop into a community with agricultural crops, causing adverse and harmful influences on the optimal growth and development of cultivated cultures. Origin and evolution of weeds are related to the origin and development of plant agricultural production. In such a phylogenetic development weeds with cultivated cultures comprise common plant communities – phytocenoses, in which weed plants in many ways have harmful effects on the optimal development and productivity of cultures. Most harmful impacts arise due to competitive relations between the cultivated cultures and weeds, such as: a) reducing the vegetation space of cultures, which makes the optimal development of certain underground and overhead bodies of reared cultures; b) shading, resulting in the suboptimal use of energy from solar radiation and the assimilation of the CO, necessary for the OP2 Timulated photosynthesis; c) strong competition in the utilization of water and mineral food substances from the soil, d) aggravation and increase of agrotechnical operations, such as those performed before sowing or planting and operations that are performed during the vegetation and over the harvesting of individual cultures. R. L. Weed vegetation in a cereal field in Pelagonia
Original article in Macedonian language Cyrillic alphabet
Кириличен напис ПЛЕВЕЛИ