Morphological investigations on stability of the structure of the arrable layer of soils cultivated with plough and active tools. Pt. 1. Brown soil developed from loess
1989
Slowinska-Jurkiewicz, A. | Domzal, H. (Akademia Rolnicza, Lublin (Poland). Instytut Gleboznawstwa)
Samples for micromorphological studies were taken from the surface soil layer (0-8 cm) and then were saturated with polyester resin Polimal-109. The polished blocks served for making photograms in which the colour of the solid phase of soil was white and that of pores black. It has been found that due to the action of implements used in tillage the arable layer of loess soil has a fragment structure. The largest aggregates are formed as the result of the work of plough; active tools disintegrate the soil much stronger. The content of water in soil during tillage does not effect, in the moisture interval analysed, the type of the structure which the arable layer is induced by the working elements of the tools used. The durability of the effects of soil is closely related to weather conditions. The soil structure induced during tillage is the longer maintained the longer is the period without rainfalls after tillage. In spring-summer period the structure of the arable layer of soils is non-aggregate regardless of the kind of implements used in autumn. The predominating structure types are crack and joined
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