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MEASUREMENT OF SOIL CONE INDEX IN WET RICE FIELD SOIL USING DIGITAL HAND-HELD CONE PENETROMETER
S. RAMACHANDRAN, D. MANOHAR JESUDAS

Published in: International Journal of Agriculture Sciences
Volume- 9, Issue-45, pp.4757-4762, Sep 2017
DPI :-> 16.10077.IJAS.2017.V9I45.47574762.2035



Abstract
Soil cone index (CI) is a soil mechanical property widely used to assess soil strength in tillage research. In this study, physical properties of soil and penetration resistance of soil were measured at four locations viz., namely Wet land and Paddy Breeding Station of Tamil Nadu Agricultural University- Coimbatore (CWL to C-PBS) and at Aduthurai and Bhavanisagar (ADT and BSR) under wet rice field condition, like those encounters by tractor at start of puddling operation. Bulk density varied with depth; and hence samples were taken at two depths of 0 to 10 cm and 10 to 20 cm. Values of Cone Index decreased with the increase in moisture content. Contrary to the effect of moisture content on Cone Index, values of Cone Index tended to increase with the increase in bulk density under both layer. An instrumented electronic hand-held cone penetrometer with a cone base area of 7.8 cm2 was developed to record the strength of rice soil. The penetration resistance in the upper layer varied from 13.63 to 35 kPa in C-WL and 6.3 to 40.57 kPa in C-PBS. Penetration resistance in the lower layer varied between145.03 and 200.36 kPa in C-WL and 88.17 and 200.64 kPa in C-PBS. In case of ADT and BSR sites, the soil strength profile was observed to be uniform and average penetration resistance in 0 to 30 cm depth varied from 67.66 to 166.73 kPa and 75.91 to 169.85 kPa respectively.

Key-Words / Index Term
SoilCone Index, Bulk Density, Moisture Content and Traction

How to cite this article
S. RAMACHANDRAN, D. MANOHAR JESUDAS , “MEASUREMENT OF SOIL CONE INDEX IN WET RICE FIELD SOIL USING DIGITAL HAND-HELD CONE PENETROMETER”, International Journal of Agriculture Sciences, 9, Issue-45, pp.4757-4762, Sep 2017. DPI:16.10077.IJAS.V9.I45.2035