The master work presents the research of macrofauna (Lumbricidae) quantity, depending on the spieces of the plants grown and the hydrotermic modes. Research object: the soil macrofauna in the light granulometre composition of soils (in Akemnė district, Smiltinė village). Research objective: by field research to evaluate quantity of macrofauna (Lumbricidae) in the nothern part of Lithuania in the light granulometre composition of soils, in the ecological production farm, depending on the spieces of the plants grown and the hydrotermic modes. Research methods: the quantity of earthworms was established by digging 0.5 x 0.5 m and 0.25 m depth monolyths of soil, gathering earthworms, calculating, weitghting and measuring them. The research established that the quantity, weight, length of the earthworms depended on the species of plants grown, forecrops and hydrotermic modes. The most advantageous crops were the kitchen-garden, the garden, the potatoes. The best forecrops were the kitchen-garden. During the years of research strong reverse correlation links between the quantity of earthworms and the hydrotermic modes were established.

In Magister work the spreading of macro fauna (Lumbricidae) in agrofitocenosis. Work object: research made in southwest Lithuania, Vilkaviškis region in the intensive agriculture farming in the hard granules ground. Aim of the work: to evaluate by field research southwest Lithuania hard granules soil macro fauna (Lumbricidae) spreading in agrofitocenosis depending on the kinds of growing plants, prior planting and hydrothermical regime. The methods of work: earthworm quantity was made digging 0,5 x 0,5m 2 and 0,25cm deep soil monolities and counting earthworms. By the research established that for earthworm quantity had influence growing plants, and their prior planting and hydrothermical regime. Most useful prior planting were barleys and long year grass. During research years between hydrothermical regime and earthworm number was defined strong and medium correlation relations.

In this master work was researched macrofloras dynamics variation during the period of vegetation in phyto association and in the soil. Research object: the part of research was accomplished in 2003 autumn by prof. hab. dr. V. Žekonienė in her executive stationary tests in Trakų Vokė. Another part was accomplished at the stationary ground in Modžiūnai fields also not far from the Merkis near Čižiūnai, and Lazdijai and Varėna regions in the light granulemetre composition of soil. Research objective: to value by the field researches the pervasion in the agrofitocenoze in the southeast part of Lithuania in the light composition of soil macrofauna, subject to cultured species of plants and hidrotermic mode in the soil fields. Research methods: the number of earthworms was counted by dig 0,5*0,5m2 and 0,3 m deep the monoliths of soil and by counting the earthworms. According to researches the number of worms depended on species of cultured plants, influence of forecrops and hidrotermic coefficient. The best preplants were perennial grass and winter rye. At the time of researches were found strong correlation links between hydrotermic modes and the number of earthworms. Keywords: earthworms, agrofitocenose, the soil fauna.