1964, Nr 12

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https://hdl.handle.net/20.500.12539/2075

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    Badanie zachwaszczenia pola doświadczalnego Katedry Ogólnej Uprawy Roli i Roślin w R.Z.D. Lipki w latach 1961-1963
    (1964) Hoffman-Kąkolowa, I.; Wyższa Szkoła Rolnicza w Szczecinie. Katedra Ogólnej Uprawy Roli i Roślin
    During a period of 3 years, observations in flora tables conducted before and after planting registered 59 weed varieties. The number of specimens per 1 m² varied from 1700 to only a few, with the predominance of yearly spring and winter varieties. The spread of weeds was due to after-cultivations and an enormous number of seeds in the soil. In the soil samples taken for testing, seeds of 51 weed varieties were found, and in 1 m² of arable soil, there were 99,500 to 267,000 seeds.