Draught and Soil Disturbance of Model Tillage Tines Under Varying Soil Parameters

ABSTRACT

Soil bin investigations were carried out to study the influence of some soil parameters

namely: moisture content and cone index, on draught force and soil disturbance of model

tillage tools. The tools were tines in the groups of very narrow tines, narrow tines and wide

tines. The soil under study was a sandy clay loam. It was observed that draught increased at a

decreasing rate as the soil moisture content increased from 11 to 22.5% (db). Polynomial

regression models best described the relationships with high R2 (coefficient of determination)

values. Soil disturbance parameters: ridge-to-ridge distance, width of crescent or width of

furrow at the surface, total disturbed width, height of ridge, and furrow depth were

determined. Tine draught increased at an increasing rate as compaction increased for a cone

index in the range of 150 to 800 kPa with polynomial regression equations best describing the

relationships. The models generated in this study were suitable for predictive purposes.

 Keywords: Soil parameters, draught, regression models, tines, soil disturbance, soil moisture,

bulk density.