Kremenets'ka Y. 3. Silvicultural features of natural foreststands in the Kiyv city green zone and scientific foundations of improvement their condition.

3. Natural foreststands in the Kiyv city green zone. The estimation of ripe natural foreststands' condition on a basis of the study of their silvicultural features, of indicators of a biological cycle of units. Field, laboratorial. Flame universal photometers: "ФПЛ-1", PLAPHO-4; universal ion meter "ЭВ-74"; Golubev's hardometer. Typological conception, modern ideas about biological cycle in the forest. Regularities of biological cycle of nitrogen, phosphorum and potassium are determined in the natural foreststands of different forestvegetative conditions; the models of recreative degression stages' dependence from hardness data of soil are elaborated. Obtained results were used in the "Diagnostic table of recreative degression stages'determination for forestvegetative conditions in the Kiyv city green zone", were extented by PA "Ukrderjlisproekt". The Kiyv city green zone.