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The influence of the initial amelioration degree on the agrophysical indices of long-fallow sod-podzolic soils

doi: 10.30766/2072-9081.2018.67.6.102-108.

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A.V. Lednev1, DSc in Agriculture, senior officer,
A.V. Dmitriev1,2, PhD in Agriculture, senior researcher, associate professor,
N.A. Pegova1, PhD in Agriculture, senior researcher,
D.A. Popov2, postgraduate student

1 Udmurt Research of Agriculture – Structural subdivision of the Federal State Budgetary Institution of Science Udmurt Federal Research Center of the Ural Branch of the Russian Academy of Sciences, Pervomaisky village, Zavyalovsky district, Izhevsk, Udmurt Republic, Russian Federation,,
2 Izhevsk State Agricultural Academy, Izhevsk, Udmurt Republic, Russian Federation, e-mail:

The influence of the initial degree of cultivation on the development of modern soil- forming processes in fallow agro-sod-podzolic loamy soils of the Udmurt Republic was established by 2015-2017 studies. It has been shown that three-year weed infestation increased the soil structure, which was expressed in a sharp decrease in the silt fraction content (<0.25 mm) in the upper 0-30 cm layer, which was a result of the sod-forming process of soil formation. The initial amelioration level of postagenogenic soils had a significant effect on the soil structure. The structural coefficient in the 0-10 cm layer in variants with increased and higher cultivation levels exceeded an indicator of averagely cultivated soil (by 35.7 and 16.7%, respectively). It is established that weed infestation of arable land led to a decrease in soil density in the 0-10 cm layer at all levels of cultivation from 2.3 to 6.1%. Changes in the layers of 10-20 and 20-30 cm depended on the cultivation level: at the average level soil density increased by 10.1-14.2%, on the increased and high level it practically did not change. The productive moisture content in the 0-30 cm soil layer in the variants with fallow land exceeded arable analogues by 22.1-46.7%. The state of cultivation contributed to an additional increase in the productive moisture content in fallow soils by 1.8-8.8%.

Keywords: postagenogenic soils, state of cultivation, agrophysical indicators, soil structure, organic matter

For citation:

Lednev A.V., Dmitriev A.V., Pegova N.A., Popov D.A. The influence of the initial amelioration degree on the agrophysical indices of long-fallow sod-podzolic soils // Agrarnayа nauka Evro-Severo-Vostoka. 2018. Vol. 67. no. 6. pp. 102-108. doi: 10.30766/2072-9081.2018.67.6.102-108.