Rainfed rice - IRRI books - International Rice Research Institute
Rainfed rice - IRRI books - International Rice Research Institute
Rainfed rice - IRRI books - International Rice Research Institute
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Sparse growth and low yield in rainfed uplands due to moisture stress<br />
Constraints Favourable areas<br />
Constraints in <strong>Rainfed</strong> <strong>Rice</strong> Farming in Eastern India<br />
Unfavourable areas<br />
Moisture stress Erratic rainfall<br />
Low and erratic rainfall<br />
Light soil texture, flat and bunded Light texture of soil, shallow soil<br />
depth, unbunded<br />
Sloping and undulating topography<br />
Soil acidity Low pH<br />
Leaching loss of nitrogen and potassium<br />
Low pH<br />
Leaching loss of nitrogen and potassium<br />
Poor fertility Low organic matter<br />
Low organic matter<br />
Deficiency of nitrogen, phosphorus,<br />
Deficiency of nitrogen, phosphorus,<br />
potassium, calcium and magnesium<br />
potassium, calcium and magnesium<br />
High phosphorus fixation<br />
High phosphorus fixation<br />
Aluminium toxicity Fe deficiency<br />
Weeds High weed infestation, e.g., Echinochloa High weed infestation, e.g., Echinochloa<br />
colona, Cyperus rotundus and colona, Cyperus rotundus and<br />
Fimbristylis miliacea Fimbristylis miliacea<br />
Diseases High infestation of blast, brown spot and High infestation of blast, brown spot and<br />
root-knot nematode<br />
root-knot nematode<br />
Insect pests<br />
Lowlands<br />
Gundhibug, termite, armyworms and Gundhibug, termite and leafhopper<br />
leafhopper<br />
Constraints Favourable areas Unfavourable areas<br />
Water regime – Periodical drought and/or submergence/<br />
flash flood<br />
Plant population – Poor<br />
Fertility Low/moderate Low, iron toxicity, zinc deficiency,<br />
salinity and sodicity<br />
Diseases Bacterial leaf blight, sheath rot and Bacterial leaf blight, sheath blight, sheath rot,<br />
sheath blight<br />
stem rot, brown spot and blast<br />
Insect pests Brown planthopper, gall midge, stem borer Stem borer, caseworm, leaffolder, white-backed<br />
and white-backed planthopper planthopper<br />
Weeds<br />
Echinochloa crus-galli, Cyperus difformis<br />
and Commelina benghalensis<br />
Echinocloa crus-galli, Cyperus difformis<br />
and Commelina benghalensis<br />
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