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- W2353295511 abstract "The soil bulk densities(BD) and water stable aggregates in the ploughed layer(0- 20 cm) under no-tillage(NT), reduced tillage(RT), moldboard plow tillage(MT) and rotary tillage(Rot) were observed during crop growth season, and their seasonal variations were analyzed. Results showed BD under MT and Rot was increasing from sowing time to harvesting time; BD under MT in October was greater than in May. In RT, deep tillage of the furrow in June significantly lowered BD than other treatments. BD under NT varied slightly. There was no significant difference in seasonal variation of both 1- 2 mm and 0.25- 0.5 mm size classes between all the treatments. The contents of 2mm water stable aggregates followed the order of NT RT MT Rot. And NT had more 5 mm water stable aggregates than other tillage systems. The contents of 0.25 mm water stable aggregates(WR0.25) changing over time showed a decreased tendency. The mean weight diameter(MWD) had no significant difference between different seasons, the geometric mean diameter(GMD) showed a decreased trend in the 10- 20 cm layer of soil, and the fractal dimension increased at first and decreased afterwards under MT. Rot had no significant seasonal variation in MWD and GMD. In the 0- 10 cm layer, MWD and GMD increased firstly and then decreased with time, and fractal dimension had a larger changing range under RT. MWD and GMD in NT had a highest value in August. Compared with MT and Rot, NT was higher in WR0.25, MWD and GMD, lower in fractal dimension. NT got a more stable soil structure than other treatments." @default.
- W2353295511 created "2016-06-24" @default.
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- W2353295511 date "2015-01-01" @default.
- W2353295511 modified "2023-09-23" @default.
- W2353295511 title "Seasonal Variations of Soil Structures under Different Tillage Systems" @default.
- W2353295511 hasPublicationYear "2015" @default.
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