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Climate & Soil

Rice can be cultivated under a variety of climatic and soil conditions. Rice cultivation is conditioned by temperature parameters at the different phases of growth. The critical mean temperature for flowering and fertilization ranges from 16 to 200C, whereas, during ripening stage, it ranges from 18 to 320C. Temperature beyond 350C affects grain filling. Rice comes up well in different soil types. For normal growth, a pH range of 5.0-8.0 is suitable.

In general, rice can be grown as a transplanted or a direct sown crop during three seasons as shown below depending on the agroclimatic situations.

Different rice growing seasons of Kerala

During second crop, in Palakkad district, where assured irrigation is available, for higher yield in photosensitive high yielding varieties the crop commencement may be adjusted in such a way that it flowers only during the second fortnight of December, facilitating proper integration with the weather, better utilization of applied fertilizers and high filling percentage.

Agroclimatic situations

Seasons

Period

From

To

General

Virippu (I crop / autumn)

April-May

Sept-Oct

Mundakan (II crop / winter)

Sept-Oct

Dec-Jan

Puncha (III crop / summer)

Dec-Jan

March-April

Onattukara

Virippu (I crop / autumn)

April

August

Mundakan (II crop / winter)

Aug-Sept

Dec-Jan

Third crop (where HYVs come up) Feb - Mar April

Kuttanad

Additional crop

May-June

Aug-Sept

Puncha

Oct-Nov

Feb-March

Kole (single cropped area)

Mundakan (Kadumkrishi)

Aug-Sept

Dec-Jan

Pokkali

Virippu (I crop / autumn)

May-June

Sept-Oct

Oorumundakan

Aug-Sept

Dec-Jan

Kaippad

Mundakan (II crop / winter)

Sept-Oct

Dec-Jan

Puncha (III crop / summer)

Dec-Jan

March-April

High ranges

Nancha

May-June

Oct-Nov

Puncha

Dec-Jan

April-May

Kari

Additional crop )

June-July

Sep- Oct

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