A method of increasing the fertility of the rooting layer of derno-podzolic soils
Sdobnikov, S.S.; Zenin, A.A.; Voronkova, V.I., 1981: A method of increasing the fertility of the rooting layer of derno-podzolic soils. Doklady Vsesoyuznoi Ordena Lenina Akademii Sel' skokhozyaistvennykh Nauk Imeni VI Lenina (9): 22-25
A micro-plot experiment on a derno-podzolic soil showed that placement of farmyard manure (100 t/ha) at depths of 25-30 cm or 30-45 cm improved the fertility of the soil for a period of 5-6 years and increased the productivity of a crop rotation by 61.3-65.1 feed units per ha.