Agricultural Engineering / Disc Plow Penetration Draft
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LABORATORY 03 · AGRICULTURAL ENGINEERING

Disc Plow Side Draft, Tilt Angle & Furrow Penetration Mechanics

Investigate the relationship between plowing depth and total draft force for an agricultural disc plow and evaluate penetration resistance under varying disc angles. Explore interactive farm machinery simulation, irrigation hydraulics, and agricultural engineering telemetry.

FARM MACHINERY · SOIL & WATER · POST-HARVEST · STRUCTURES

Your virtual agricultural engineering laboratory.

TOTAL DRAFT FORCE F—
FIELD & TEST CELL TELEMETRY

Ready to sample with Depth d = 16.0 cm.

16.0 cm
Disc diameter: 66 cm (3 discs)

Adjust Depth d, then execute agricultural trial.

Agricultural engineering telemetry and biosystems states are evaluated rigorously using 64-bit IEEE 754 precision. Residuals reflect ordinary least-squares regression across successive observations. Continuous data structures support high-fidelity agricultural and environmental modeling.

Agricultural assumptions and boundary condition limits

Assumes consistent soil penetration resistance without hidden boulder strikes or subsoil rock shelves. Evaluated at constant disc angle of 42° and tilt angle of 20° on hard clay soil. Draft F represents the forward horizontal component of total soil resistance.

Agricultural apparatus & field instrumentation sensors.

Three-Disc Mounted Agricultural Plow

Features 66 cm diameter heat-treated boron steel concave discs with heavy-duty roller bearings.

Tri-Axial Three-Point Hitch Dynamometer

Measures longitudinal draft, vertical penetration reaction, and lateral side forces simultaneously.

Spring-Loaded Rear Furrow Wheel

Absorbs lateral side draft and maintains plow tracking in the furrow bottom.

Mechanical Disc Inclinometer & Protractor

Sets and verifies disc angle (horizontal) and tilt angle (vertical) with 0.5° precision.

Ultrasonic Tillage Depth Sensor

Continuously measures distance from plow frame to unplowed ground surface.

Multi-Channel Digital Telemetry Hub

Logs forces, tractor forward speed, and wheel draft signals at 100 Hz.

FOLLOW THE METHOD

A reason behind every step.

Investigate the relationship between plowing depth and total draft force for an agricultural disc plow and evaluate penetration resistance under varying disc angles. Standardized parameter settings: 10.0, 13.0, 16.0, 19.0, 22.0, 25.0 cm.

01

Disc Angle & Tilt Angle Calibration

Adjust the disc standard clamps to set disc angle to exactly 42° and tilt angle to 20° using the mechanical protractor and inclinometer.

02

Hitch Geometry & Sway Setup

Attach the plow to the tractor Category II three-point linkage, adjusting check chains to allow slight floating sway for the furrow wheel to seat against the furrow corner.

03

Zero-Load Sensor Balancing

Elevate the plow fully with the hydraulic lift and record tare offsets on all draft, vertical, and side load cell channels.

04

Shallow Penetration Run

Set the rear furrow wheel depth stop to d = 10.0 cm, engage tractor forward speed at 5.0 km/h, and log steady draft force over a 50-meter test course.

05

Sequential Depth Increments

Increment the working depth in five uniform stages up to 25.0 cm, checking furrow slice throw and soil pulverization consistency.

06

Penetration Gradient Analysis

Plot draft force F against depth d, perform ordinary least-squares regression to extract the depth draft gradient c_d, and calculate side force ratio.

YOUR NOTEBOOK · 0 OBSERVATIONS

Turn measurements into agricultural engineering insight.

See a complete example report ↗

Points are your recorded observations. The solid regression line validates Disc Plow Penetration Draft mathematical scaling.

LINEAR REGRESSION FIT · y = mx + b
F = c_d · d = 0.3200 · d
#Operating Depth of Cut d (cm)Total Draft Force F (kN)Plowing depth d (cm)Draft force F (kN)Remove

No readings yet. Execute an agricultural trial and record it.

Calculate it yourself.

CHECK YOUR UNDERSTANDING

Explain what the agricultural metrics mean.

What is the typical disc angle range for standard agricultural disc plows?

Why does a disc plow generate substantial lateral side force?

If the depth draft gradient is c_d = 0.32 kN/cm, what is the expected draft at d = 20 cm?

What primary mechanism prevents disc plows from clogging in sticky, trashy soils?