Rice-the staple food- Land Preparation
Primary Land Preparation
What is the purpose of primary tillage?
- Increases the rhizosphere soil depth and make adequate space for the roots to grow.
- Incorporates weed biomass and crop residues to soil, and improve organic matter content in the soil.
What is the perfect timing?
- The moisture content of the soil determines the time of tillage.
- Ideal when soil is adequately friable at the time of ploughing.
- Primary tillage should be done at least 14 days before the secondary tillage (3-4 weeks before crop establishment).
What are the techniques to be used?
- For deep ploughing – Moldboard ploughs fixed to 04- or 02-wheeled tractors are used.
- For medium depth tillage – Disc plough or conventional plough with animal /manual power are used.
- Recommended depth of ploughing is about 20 cm.
- Water should be incoperated to cover the half of the soil clumps
- The green manure should be incoperated to fhe field after plowing.
- Bunds should be cleaned and the weeds should be also incoperated to the field
What are the important factors that need special attention?
- Continuous cropping and use of improper ploughing equipment could create a sandy shallow root zone.
- If the time gap between tillage and crop establishment is extended, tillage steps should be repeated to prevent soil compaction.
- Deep ploughing is important to control perennial weeds like “Atawara“ (Panicum repens Linn.) and “Kaladuru” (Cyprus rotundus L.).