Oats and barley on different taxons of sod-calcareous and soddy soil associations
2001
Kask, R. | Samel, H. (Estonian Agricultural Univ., Tartu (Estonia))
North-Estonian soils are characterised by a frequent alternation of soils based on limestone, pebbe mortaine and marine sediments. The field studied contain six different soils. During 1992-1998 the average joint crop of oats and barley harvested from the studied field was (depending on the soil) 1.11-2.83 t/ha. The minimum crop was gathered from a thin limestone-based soil. The 1000-grain mass of barley measured in 1994, 1996, 1998 and 1999 ranged from 23.9 to 44.5 g. The characteristic 1000-grain mass was in a positive correlation (r=0.53...0.90) with the crops, which in turn depended on the soils as well as on the weather conditions in each particular year. As most of the variation crops (within a uniformly cultivated plot) can be accounted for by the basic characteristics of the soils, it is necessary to study their mineral and humus profiles, water regime etc. Studies of the agrochemical, agrophysical and meliorative condition of soils, however, as well as crop mapping without considering the basic characteristics of the soils can never provide a satisfactory survey of the reasons of the unevenness of field crops in each concrete case
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