Energy distribution between maize and weeds

The aim of the study was to investigate the variations in accumulation of dry substance and water in maize and weeds, induced by two herbicide types (applied pre- and post-emergence). Weeds tend to captivate higher energy amounts than crop plants. Greater free energy of water indicated increased energy consumption for non-spontaneous processes in weeds. Relatively unchanged net heat of combustion of maize and lower net heat of combustion of weeds indicated herbicide ability to reduce energy accumulation by weeds and to remain it constant in maize plants.