Pagrindinio žemės dirbimo įtaka dirvožemio sėklų bankui ir piktžolėtumui javų bei žolių sėjomainoje

In the shallow ploughing and shallow ploughless tillage treatments there were found 25.5% and 41.5% more weed seed species in the soil, compared with the conventional tillage treatment. The seeds of Chenopodium album L., Persicaria lapathifolia L., Fallopia convolvulus L. and Viola arvensis Murray were found in all tillage treatments. The distribution of F. convolvulus L., P. lapathifolia L. seeds was significantly influenced by soil tillage only, that of V. arvensis Murray by soil tillage and its interaction with soil fertility improvement measures, and that of Ch. album L. by soil fertility improvement measures only

The influence of PGR on chlorophyll amount, UV-B, par absorption and productivity of two winter wheat varieties

Vytauto Didžiojo universitetasŽemės ūkio akademij

Integrated weed management in rice

Weeds are one of the major constraints in rice production systems. The development and adoption of proper integrated weed management strategies must form an integral part of sustainable rice production. An integrated weed management is defined as combinations of two or more weed control measures at low inputs in order to reduce weed competition in rice below an economical threshold level. Use of preventive methods and cultural practices such as crop simulation through nutrient application, method of rice sowing, planting time, plant population, and weed competitive cultivars have been recommended for minimizing impact of weeds on crop yield. The use of herbicide rotation, herbicide-resistant crops, bioherbicides, and their integration with hand tools or agricultural implements should be encouraged for better weed control efficiency