Classification of Tillage
Classification of Tillage
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Tillage is divided into two classes:
Primary tillage
- It constitutes the initial major soil working operation.
- It is normally designed to reduce soil strength, cover plant materials and rearrange aggregates.
- The operations performed to open up any cultivable land with a view to prepare a seed bed for growing crops is known as primary tillage.
- Implements may be tractor drawn or animal drawn implements.
- Animal drawn implements mostly include indigenous plough and mould-board plough.
- Tractor drawn implements include mould-board plough, disc plough, subsoil plough, chisel plough and other similar implements.
Secondary tillage
- Tillage operations following primary tillage which are performed to create proper soil tilth for seeding and planting are secondary tillage.
- These are lighter and finer operations, performed on the soil after primary tillage operations.
- Secondary tillage consists of conditioning the soil to meet the different tillage objectives of the farm.
- The implements used for secondary tillage operations are called secondary tillage implements.
- They include different types of harrow, cultivators, levellers, clod crushers and similar implements.
- These operations are generally done on the surface soil of the farm.
- Secondary tillage operations do not cause much soil inversion and shifting of soil from one place to other.
- These operations consume less power per unit area compared to primary tillage operations.
- To break the big clods and to make the field surface uniform and levelled.
- To cut crop residues and mix them with top soil of the field.
- Secondary tillage implements may be tractor drawn or bullock drawn implements. Bullock drawn implements include harrows, cultivators, hoes etc.
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Last modified: Tuesday, 26 June 2012, 1:36 PM