@misc{Kajak_Anna_Productivity_1971,
 author={Kajak, Anna and Breymeyer, Alicja and Pętal, Joanna},
 editor={Polish Academy of Sciences, Institute of Ecology},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Warszawa},
 howpublished={online},
 year={1971},
 language={eng},
 abstract={Comparison was made of the predatory arthropods in a natural meadow in a nature reserve and in cultivated meadows. It was found that predators were as a rule more numerous in the nature reserve meadow in which no agricultural practices were carried out. Analysis was made of the trophic relations in two of the most numerous predatory groups in the study habitats, that is spiders and ants.},
 type={Text},
 title={Productivity investigation of two types of meadows in the Vistula valley. 11, Predatory arthropods},
 URL={http://rcin.org.pl/Content/71710/PDF/WA058_86464_P2840-T19_Eko-Pol-A-Nr-17.pdf},
 volume={19},
 number={17},
 journal={Ekologia Polska},
 publisher={Państwowe Wydawnictwo Naukowe},
 keywords={meadows, soils, research, Poland, primary productivity, ecology},
}