The term serf, in the sense of an unfree peasant of the Russian Empire, is the usual translation of krepostnoi krestyanin (ÐºÑÐµÐ¿Ð¾ÑÑÐ½Ð¾Ð¹ ÐºÑÐµÑÑÑÑÐ½Ð¸Ð½). The origins of serfdom in Russia are traced to Kievan Rus' in the 11th century. Legal documents of the epoch, such as Russkaya Pravda, distinguished several degrees of feudal dependency of peasants.
Thatching is the craft of building a roof with dry vegetation such as straw, water reed, sedge (Cladium mariscus), rushes, or heather, layering the vegetation so as to shed water away from the inner roof. It is a very old roofing method and has been used in both tropical and temperate climates.hatching methods have traditionally been passed down from generation to generation, and numerous descriptions of the materials and methods used in Europe over the past three centuries survive in archives and early publications.
An excessive layer of thatch can cause problems for lawns. Thatch in lawns is often misunderstood; both its cause and control. Some lawns have serious thatch problems while others do not. Thatch is a layer of living and dead organic matter that occurs between the green matter and the soil surface. Excessive thatch (over Â½ inch thick) creates a favorable environment for pests and disease, an unfavorable growing environment for grass roots, and can interfere with some lawn care practices.