chemical agents used for protection against organisms, undesirable in medical or economical sense. The important group of C.k. includes pesticides.
Поиск
По запросу «Chemical weed-killers and pest-killers» — результатов: 2
Словарные статьи
1В определениях
1– artificially cultivated ecosystem (biogeocenosis), the basic functions of which (first of all, productivity) are maintained by a system of agronomical measures (ploughi