දවස් 45හේ ගංවතුරට රත්නපුරේ ඈයො ගෙනාපු භාණ්ඩෙ, ගොයියා ගොඩ

oils with good water retention capacity with high amount of clay and organic matter are ideal for rice cultivation.
Clay or clay loams are most suited for rice cultivation.
Such soils are capable of holding water for long and sustain crop.
Rice being a semi-aquatic crop, grows best under sub-merge conditions.
Rice is cultivated in almost all types of soils with varying productivity.
The major soil groups where rice is grown are riverine alluvium, red-yellow, red loamy, hill and sub-montane, Terai, laterite, costal alluvium, red sandy, mixed red, black, medium and shallow black soils.
It grows well in soils having a pH range between 5.5 and 6.5.
Special technologies for problem soils :
For fluffy paddy soils: compact the soil by passing 400kg stone roller or oil-drum with stones inside, eight times at proper moisture level (moisture level at friable condition of soil which is approximately 13 to18%) once in three years to prevent the sinking of draught animals and workers during puddling.
For sodic soils: For sodic soils with pH values of more than 8.5, plough at optimum moisture regime, apply 50% of total gypsum requirement uniformly, impound water, provide drainage for leaching out soluble salts and apply green leaf manure at 5 t/ha, 10 to 15 days before transplanting. Mix 37.5kg of Zinc sulphate per ha with sand to make a total quantity of 75kg and spread the mixture uniformly on the leveled field. Do not incorporate the mixture in the soil. Rice under sodic soil responds well to these practices.
For saline soils: For saline soils with EC values of more than 4 dS/m, provide lateraland main drainage channels (60cm deep and 45cm wide), apply green leaf manure at 5 t/ha at 10 to 15 days before transplanting and 25% extra dose of nitrogen in addition to recommended P and K and ZnSo4 at 37.5 kg/ha at planting
For acid soils: For acid soils apply lime based on the soil analysis for obtaining normal rice yields. Lime is applied @ 2.5t/ha before last ploughing. Apply lime at this rate to each crop upto the 5th crop.

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