The effects of some soil additives on hydro-physical and chemical properties of soils

Abstract

Preventing soil degradation and soil rehabilitation is very significant issue in terms of soil and land management. In this study the effects of pumice, bituminous shale and organic material (poplar tree leaves) addition to different treatments (1. dose 10% and 2. dose 20%) on some degraded grassland soil physical and chemical properties was examined. Incubation period of the soil was three months. The experiment was performed with three replication. Moisture contents in pots were kept around field capacity with adding distilled water after weighing the pots in every 3 days. 12 topsoil samples (0-15 cm depth) was taken by using grid sampling method from a degraded grassland which is located in the South of Akkaya Dam in Nigde Province. Soil samples were sieved 2 mm and 10% pumice (P1), bituminous shale (BS1), organic material (OM1), 10 % pumice+bituminous shale (P+BS)1, pumice+organic material (P+OM)1, bitüminous shale+organic material (BS+OM)1, bituminous shale+pumice+organic material (BS+P+OM)1 and 20 % pumice (P2), bituminous shale (BS2) , organic material (OM2) were added to the each soil pot according to dry weight basis. Study results showed that soil additives was effected some soil properties. Aggregate stability increased 65 % in (BS+P+OM)1 treatment. The highest water holding capacity increasing was observed in (P+OM)1 treatment (69 %) compared to control pot. Total porosity increased highly in OM2 treatment pot. Soil bulk density decreased in (P+OM)1, (BS+P+OM)1, P2, BS2 and OM2 treatments pots compared to control. Soil organic matter increased in OM2 (39 %) and (BS+OM)1 (25 %) compared to control pot.

Keywords

• soil degradation
• soil additives
• bituminous shale
• pumice
• organic matter
• toprak bozulması
• toprak iyileştiriciler
• bitümlü şeyl
• pomza
• organik madde