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RICE RATOON CROP MANAGEMENT IN KARNATAKA 91Table 5. Performance of main and ratoon crops of rice variety lntan in farmers'fields, Chikkamagalur District, Karnataka, 1979-80.LocationTrial Duration (d) Grain yield (t/ha)area(ha) Main Ratoon Main Ratooncrop crop crop cropHavandur, Koppa 0.13 173Addada, Koppa 0.08 174B. Kanabur, N. R. Pura 2.40 187Bandihatti, N. R. Pura 2.60 -Bannur, N. R. Pura 1.00 -Kamalapur, N. R. Pura 0.80 -Madabur, N. R. Pura 1.00 -Madabur, N. R. Pura 1.00 -Bigganahalli, 0.32 190ChlkkamagalurBigganahalll,0.11192ChlkkamagalurM. D. Halli, 0.16 190ChikkamagalurKelagur, Mudigera0.10 180Lalitha Estate, Mudigere 0.40 200Vijayalli, Mudigere 0.80 200146145147-----1391311321401371366.55.67.8-----3.81.15.54.83.23.74.23.83.83.02.52.82.52.54.60.73.93.61.5 a2.9a Suffered very heavy wild boar damage.General observations in the region revealed that in early-planted riceharvested in November, the ratoon crop will flower in midwinter and is subject tocold damage. But main crops cut in December and January flower after winter,leading to successful ratoon crop production. This suggests that we should developvarieties suited for cutting in different months, depending on the planting time of themain crop and ratoon crop potential of specific situations. Cold tolerance in theratoon or flowering of the ratoon crop after winter are the criteria to be adopted.The cultural practices currently followed need to be refined after adequateinvestigation and the fertilizer requirement of the ratoon crop determined separatelyfor lowlands and midlands, since lowlands have a problem of iron toxicity.Phosphorus deficiency is common in both lowlands and uplands. The report (3) thatin some genotypes the seed quality of the ratoon crop is as good as that of the maincrop is encouraging; seed production from the ratoon crop may thus be possible.Planting value and stability of ratoon crop seed are worth studying to determine theseed production potential.Some incidence of gall midge insect was observed in ratoon crops, althoughthere was none in the preceding main crop. Care should be exercised to study itspossible intensification and necessary control.RESEARCH NEEDS AND ADVANTAGESOF RATOON CROPPINGVarietal ChoiceThe experiment with 25 breeding lines in 1980-81 showed that the cultivars thatmatured late in both the main and the ratoon crops (Intan UAS, Intan IRRI,Mingolo) escaped low-temperature damage in the ratoon crop and produced
Table 6. Summary of observations on 45 rice cultivars studied for the combined performance in the main and ratoon crops at the Regional Research Station,Mudigere, 1980-81 kharif and rabi.Main crop Ratoon crop Combined32.920.518.710.425.841.021.924.434.555.117.731.919.87.423.28.719.615.020.226.923.526.418.326.521.531.011.72.320.730.96.2Cultivar Plant Days Grain Plant Days Grain Days Grain Per dayht to yield htto yield to yield production(cm) maturity (t/ha) (cm) maturity (t/ha) maturity (t/ha) (kg/ha)1. IR19794-2-2-22. IR19794-3-2-23. lR19796-14-2-24. lR19799-17-3-15. lR9201-101-2-2-76. IR9209-48-3-27. IR9828-41-2-18. IR13214-99-2-2-39. IR13429-305-310. IR9209-81-2-3-2-211. lR9940-11-2-312. IR13240-15-3-3-213. IR11248-227-1-2-214. lR11248-8-242-3-1-115. lR9129-417-1-316. lR9209-49-1-2-1-217. IR975-303-3-1-3-2-318. lR9846-256-3-119. IR13368-4-320. lR13371-86-121. IR15675-74-1-322. IET312723. IET409424. IET40525. Double Dwarf26. IR2055-462-3-227. Carreon28. Ram Thulasi29. Thilalek Chanian30. lR13641-431. lR13641-207471648060717484707477636573726563657057658383745975761098264671291291311401321311401491291371361381471281281281321311291301291371951341201501491391371681316.43.93.62.25.48.34.35.26.97.13.76.74.31.44.91.43.92.84.55.64.85.73.95.33.96.42.50.44.16.40.970656060607072807075656060606060606050506065707060756080706065817876818384848185849184908490838378838685878380837677807979890.50.40.20.10.20.50.60.40.50.60.30.40.40.10.20.40.30.40.10.20.20.20.30.40.40.60.10.10.30.30.42102072 072212152152242312142212272222372122182112152092122162142242282142032262262192162172206.94.23.92.35.58.84.95.67.47.74.07.14.71.65.11.84.23.14.65.85.05.94.25.74.47.02.60.54.56.71.4
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RICERATOONING1988INTERNATIONAL RICE
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ContentsForewordWelcome 1OverviewRi
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Genetics and varietal improvementIn
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2 RICE RATOONINGthe main crop. Harv
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4 RICE RATOONINGTable 1. Area, prod
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6 RICE RATOONINGTable 2. Rice varie
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8 RICE RATOONING1. Effect of spacin
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10 RICE RATOONINGHowever, no signif
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12 RICE RATOONINGrelating to seed v
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14 RICE RATOONING5. Cultivars that
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Economic perspectivesof rice ratoon
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ECONOMIC PERSPECTIVES OF RICE RATOO
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32 RICE RATOONINGla) Developmental
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34 RICE RATOONINGCutting heightStub
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36 RICE RATOONINGEarly flooding enc
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38 RICE RATOONING2. Factors affecti
Page 47 and 48: 40 RICE RATOONING27. Nair, N.R., an
Page 49 and 50: 42 RICE RATOONING1. Changes in till
Page 51 and 52: 44 RICE RATOONINGTable 2. Character
Page 53 and 54: 46 RICE RATOONING9. International R
Page 55 and 56: 48 RICE RATOONINGplot size is 6 row
Page 57 and 58: 50 RICE RATOONINGimproved ratooning
Page 59 and 60: 52 RICE RATOONINGTable 6. Simple co
Page 62 and 63: Utilization of rice ratooningby far
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Page 68 and 69: Rice ratooningin the Dominican Repu
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Page 77 and 78: 89111306514772Special points Refere
Page 79 and 80: 72 RICE RATOONINGANDHRA PRADESHBasu
Page 81 and 82: 74 RICE RATOONINGrice observed at t
Page 83 and 84: 76 RICE RATOONINGTAMIL NADUBalasubr
Page 85 and 86: 78 RICE RATOONING19. Reddy, T.G., M
Page 87 and 88: 80 RICE RATOONING1. Rice-growing re
Page 89 and 90: 82 RICE RATOONING2. High cutting he
Page 91 and 92: 84 RICE RATOONINGTable 3. Yield tri
Page 94 and 95: Rice ratoon crop managementin the h
Page 96 and 97: RICE RATOON CROP MANAGEMENT IN KARN
Page 100 and 101: 23123722821721922222421423122421722
Page 102: RICE RATOON CROP MANAGEMENT IN KARN
Page 105 and 106: 98 RICE RATOONING1. The Tungabhadra
Page 107 and 108: 100 RICE RATOONINGthe results of po
Page 109 and 110: 102 RICE RATOONINGTable 4. Effect o
Page 112 and 113: Ratoon rice researchin Karnataka, I
Page 114 and 115: RATOON RICE RESEARCH IN KARNATAKA 1
Page 116: RATOON RICE RESEARCH IN KARNATAKA 1
Page 119 and 120: 112 RICE RATOONINGTable 1. Area and
Page 121 and 122: 114 RICE RATOONINGonly 7.5-49.7% of
Page 123 and 124: 116 RICE RATOONINGTable 5. Relation
Page 126 and 127: Scope for rice ratoon croppingin th
Page 128 and 129: RATOON CROPPING IN NORTHEASTERN IND
Page 130 and 131: Scope for rice ratoon croppingin th
Page 132 and 133: RATOON CROPPING IN CENTRAL AND NORT
Page 134 and 135: RATOON CROPPING IN CENTRAL AND NORT
Page 136 and 137: Potential of rice ratooningin Madag
Page 138 and 139: RICE RATOONING IN MADAGASCAR 131a.
Page 140 and 141: RICE RATOONING IN MADAGASCAR 133Tab
Page 142 and 143: Potential for rice ratooningin east
Page 144 and 145: RICE RATOONING IN EASTERN INDIA 137
Page 146 and 147: RICE RATOONING IN EASTERN INDIA 139
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RICE RATOONING IN EASTERN INDIA 141
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Ratooning in Bangladesh:prospects a
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RATOONING IN BANGLADESH 145RATOON C
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RATOONING IN BANGLADESH 147Table 4.
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RATOONING IN BANGLADESH 149OTHER FA
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152 RICE RATOONINGTable 1. Hybrid s
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154 RICE RATOONINGThe studies sugge
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156 RICE RATOONINGVARIETIES AND CUL
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158 RICE RATOONINGspikelet primordi
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160 RICE RATOONINGTable 5. Effect o
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Agronomic principles and practiceso
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AGRONOMIC PRINCIPLES AND PRACTICES
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Rice ratooning: breeding,agronomic
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BREEDING, AGRONOMIC PRACTICES, AND
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188 RICE RATOONINGwas the most effe
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190 RICE RATOONINGRESULTSMain crop
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192 RICE RATOONINGRatoon tiller reg
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194 RICE RATOONING9. Rister, M. E.,
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196 RICE RATOONINGExcept for rice w
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198 RICE RATOONINGInsect survivorsh
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200 RICE RATOONING1. Stem borer occ
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202 RICE RATOONING3. Population dyn
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204 RICE RATOONING2, 3). Microvelia
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206 RICE RATOONINGplant chemicals a
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208 RICE RATOONING17. Krishnamurthy
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210 RICE RATOONING1. Yellow dwarf c
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212 RICE RATOONING3. The effect of
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214 RICE RATOONINGAlthough the inte
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216 RICE RATOONINGTable 6. Sheath b
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Yellow dwarf disease in ratoon rice
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YELLOW DWARF DISEASE IN RATOON RICE
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228 RICE RATOONINGTable 1. Estimate
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Main crop a Ratoon crop b53.956.155
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Disease and insect pestsand their c
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DISEASE AND INSECT PESTS IN RICE RA
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DISEASE AND INSECT PESTS IN RICE RA
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Inheritance of ratooning abilityin
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INHERITANCE OF RATOONING ABILITY IN
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248 RICE RATOONINGShould the season
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250 RICE RATOONINGYield and yield-c
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252 RICE RATOONINGMain-crop photosy
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254 RICE RATOONINGShort-termGiven t
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Commercial ratoon rice productionin
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COMMERCIAL RATOON RICE PRODUCTION I
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0.180.200.490.250.160.270.390.350.3
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268 RICE RATOONING1. Path analysis
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270 RICE RATOONINGRecommendationsVa
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ParticipantsT. AhmedRice Experiment
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Varietal indexA200, 221Achra 108/1,
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VARIETAL INDEX 277IR2061-465-1, 12I
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VARIETAL INDEX 279RU7502006, 49, 51
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RICE RATOONING - IRRI books - International Rice Research Institute

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