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  3. The ideal season for planting the crop in the main field is July-August or November-December. Planting is done on raised beds of

The ideal season for planting the crop in the main field is July-August or November-December. Planting is done on raised beds of

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问题    The ideal season for planting the crop in the main field
is July-August or November-December. Planting is done on
raised beds of 60～90cm wide at a spacing of 30 x15cm (30cm   【M1】______
between rows and 15cm within plants in the same row).         【M2】______
Dry cow-dung/poultry manure or compost on the rate of 10      【M3】______
tonnes a hectare can be applied at the time of preparing the beds.
Application of compost, rice husk or saw dust at the rate of
two tonnes per every hectare was found to be beneficial in increasing【M4】______
the yield, according to Mr. Kutty. In wetlands, the beds should be
raised sufficient to limit water stagnation to the channels   【M5】______
between the raised beds. Given details on the chemical        【M6】______
fertilizer application, Dr. Balachandran said, about 1～2 doses
of 40～60 kg of nitrogen, 60 kg of phosphorus and 100 kg of
potassium may be applied for one hectare of cuttings.
In wetlands, where earthing is not possible due water         【M7】______
logging, fertilizers can be applied on the beds and raked
into the soil. Though the variety is resistant to major pests,
nematode infestation have been observed in some areas.        【M8】______
Crop rotation and use of soil conditioners, such as rice
husk, can help control the spread, according to Dr. Balachandran.
Irrigation may be stopped during the monsoon and
be resumed during dry spells by aIlowing water to flow in the 【M9】______
channels. The crop can be harvested after 120～150 days. For those
interested in growing this variety, the seed tubers will
be abtainable by December at the Regional Agricultural Research【M10】______
Station, Pattambi or can be collected from farmers.
【M3】
选项
答案On—at
解析 at the rate of为固定搭配。
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