Performance analysis of a tractor - power harrow system under different working conditions

Tillage is one of the most important operations in the preparation of land for growing crops. Among secondary tillage implements, power harrows, which have a series of PTO-driven rotors which rotate about their vertical axis, are widely adopted in soil-working operations. Typically, this kind of implement is highly energy consuming, due to the heavy mechanical loads required to pull the harrow and the PTO (Power Take-Off) torque needed to drive the rotors. This paper reports the results of extensive in-field experimentation in which the relationship between the operating conditions of a tractor - power harrow system and the mechanical loads (i.e. PTO torque and draught) were investigated in two different test site fields. The test parameters consisted of: nominal tractor speed (3, 6, 9 and 12 km h−1), nominal working depth (6, 9 and 15 cm) and rotor speed (285 and 411 rpm) at a PTO speed of 1000 rpm. The data was statistically analysed by means of a linear mixed effect model to assess the differences in the tractor - harrow system performances measured under different working conditions. The presented results show which operating conditions can be favourable regarding energy and fuel consumption as this information may be very useful to farmers to reduce costs. Moreover, the measured mechanical loads concerning PTO torque and draught may also be beneficial for manufacturers to improve the design of these kinds of implements.

[1]  Inge Håkansson,et al.  A review of research on seedbed preparation for small grains in Sweden , 2002 .

[2]  Johan Arvidsson,et al.  Specific draught for mouldboard plough, chisel plough and disc harrow at different water contents , 2004 .

[3]  Mohammad Askari,et al.  Performance of tractor and tillage implements in clay soil , 2017 .

[5]  R. K. Wood,et al.  Powered Harrow Operating Parameters: Effects on Soil Physical Properties , 1993 .

[6]  H. Raheman,et al.  Effect of velocity ratio on performance characteristics of an active-passive combination tillage implement , 2020 .

[8]  L. Gaston,et al.  Winter cover crops effect on soil moisture and soybean growth and yield under different tillage systems , 2019 .

[9]  M. Almagro,et al.  Beneficial effects of reduced tillage and green manure on soil aggregation and stabilization of organic carbon in a Mediterranean agroecosystem , 2015 .

[10]  Ibrahim Akinci,et al.  Strength-based design analysis of a Para-Plow tillage tool , 2020, Comput. Electron. Agric..

[11]  Michele Mattetti,et al.  Influence of the speed on soil-pressure over a plough , 2017 .

[12]  M. V. Braunack,et al.  Soil aggregation in the seedbed: A review. I. Properties of aggregates and beds of aggregates , 1989 .

[13]  T. Gaiser,et al.  Interactive effects of conservation tillage, residue management, and nitrogen fertilizer application on soil properties under maize-cotton rotation system on highly weathered soils of West Africa , 2020 .

[14]  H. Raheman,et al.  Performance of combined offset disc harrow (front active and rear passive set configuration) in soil bin , 2018, Journal of Terramechanics.

[15]  Santosh K. Pitla,et al.  In-field fuel use and load states of agricultural field machinery , 2016, Comput. Electron. Agric..

[16]  H. Raheman,et al.  Comparative analysis of tillage in sandy clay loam soil by free rolling and powered disc harrow , 2019, Engineering in Agriculture, Environment and Food.

[17]  R. Oberti,et al.  A Technical-Economic Comparison between Conventional Tillage and Conservative Techniques in Paddy-Rice Production Practice in Northern Italy , 2019, Agronomy.

[18]  P. Schjønning,et al.  Soil strength and soil pore characteristics for direct drilled and ploughed soils , 2000 .

[19]  S. K. Upadhyaya,et al.  Energy Requirements for Chiseling in Coastal Plain Soils , 1984 .

[20]  H. Raheman,et al.  An approach for draft prediction of combination tillage implements in sandy clay loam soil , 2006 .

[21]  Gary L. Kinzel,et al.  Computer Graphics Analysis of Rotary Tillers , 1981 .

[22]  M. Braunack.  Effect of aggregate size and soil water content on emergence of soybean (Glycine max, L. Merr.) and maize (Zea mays, L.) , 1995 .

[23]  Terenziano Raparelli,et al.  Kinematic analysis of rotary harrows , 2019 .

[24]  Vilas M. Salokhe,et al.  Performance of Free Rolling and Powered Tillage Discs , 2010 .

[25]  Luigi Sartori,et al.  Assessing Topsoil Movement in Rotary Harrowing Process by RFID (Radio-Frequency Identification) Technique , 2019, Agriculture.

[26]  U. D. Perdok,et al.  Soil-tool interactions and field performance of implements , 1994 .

[27]  W. Köppen.  Das geographische System der Klimate , 1936 .

[28]  M. F. Kocher,et al.  Tillage implement forces operating in silty clay loam , 1996 .

[29]  Prathuang Usaborisut,et al.  Performance of combined tillage tool operating under four different linkage configurations , 2018, Soil and Tillage Research.

[30]  V. Damanauskas,et al.  Efficiency of disc harrow adjustment for stubble tillage quality and fuel consumption , 2019, Soil and Tillage Research.

[31]  R Core Team,et al.  R: A language and environment for statistical computing. , 2014 .

[32]  R. S. Bello,et al.  Agricultural Machinery Management , 2015 .

[33]  K. J. Shinners,et al.  Performance Characteristics of a Tillage Machine with Active-Passive Components , 1993 .

[34]  James G. Hendrick,et al.  Rotary Tiller Design Parameters, V: Kinematics , 1978 .

[35]  A. F. Kheiralla,et al.  Modelling of power and energy requirements for tillage implements operating in Serdang sandy clay loam, Malaysia , 2004 .

[36]  Marie-France Destain,et al.  Effects of design and kinematic parameters of rotary cultivators on soil structure. , 1990 .

[37]  Günther Weise.  Active and Passive Elements of a Combined Tillage Machine: Interaction, Draught Requirement and Energy Consumption , 1993 .

[38]  Robert D. Grisso,et al.  Fuel Prediction for Specific Tractor Models , 2008 .

[39]  I C Edmundson,et al.  Particle size analysis , 2013 .

[40]  J. Adamowski,et al.  Soil fragmentation and aggregate stability as affected by conventional tillage implements and relations with fractal dimensions , 2020 .

[41]  Jean-Noël Aubertot,et al.  Emergence of seedlings of sugar beet (Beta vulgaris L.) as affected by the size, roughness and position of aggregates in the seedbed , 2000, Plant and Soil.

[42]  Anacleto Pinheiro,et al.  Tractor energy requirements in disc harrow systems , 2007 .

[43]  K. M. Adam,et al.  SECONDARY TILLAGE TOOL EFFECT ON SOIL AGGREGATION , 1992 .

[44]  M. R. Carter,et al.  Comparative tillage costs for crop rotations utilizing minimum tillage on a farm scale. , 1998 .

[45]  A. Cipliene,et al.  Experimental validation of tyre inflation pressure model to reduce fuel consumption during soil tillage , 2019, Biosystems Engineering.

[46]  John M. Fielke,et al.  Furrow parameters in rotary strip-tillage: Effect of blade geometry and rotary speed , 2014 .

[47]  R. Berntsen,et al.  Soil fragmentation and the efficiency of tillage implements , 2002 .