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Table 1. Effect of IPM components on pod borer larval numbers m –2 in chickpea in theBarind, 2002-03.VariableTreatmentSampling date7 Feb 26 Feb 30 MarBird perches No perch 3.0 6.0 50.6Perch 2.6 2.0 19.2Significance a ns ** nsHNPV No spray 5.2 4.6 42.6Chemical 3.0 2.4 18.4HNPV 1.8 1.4 12.8Significance ** * *Mixed cropping Sole 4.0 5.4 56.8Mixture 2.4 2.6 19.2Significance * ** ***a ns = not statistically significant; * = significant at P
Table 2. Effect of IPM components on the incidence (%) of bored pods and on grain yield ofchickpea in the Barind, 2003-04.Variable Values P valueBird perches No perches PerchesBored pods (%) 17.8 7.9 0.05Grain yield (t ha –1 ) 0.70 0.70 0.99HNPV No spray Chemical HNPVBored pods (%) 26.9 14.2 8.6 0.001Grain yield (t ha –1 ) 0.39 0.67 0.81 0.109Mixed cropping Sole crop Mixed cropBored pods (%) 20.4 10.3 0.031Grain yield (t ha –1 ) 0.45 0.41 0.251Combined IPM No IPM All IPMBored pods (%) 15.0 7.8 0.041Grain yield (t ha –1 ) 0.61 0.36 0.229Table 3. Effect of IPM on the incidence of larvae (no. m –2 ), percentage of bored pods, andgrain yield of chickpea in the Barind, 2004-05.VariableSole cropMixed cropNo IPM IPM P value No IPM IPM P valueLarvae (no. m –2 ) 1.71 0.27
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Improving AgriculturalProductivity
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Bangladeshi experiences with a drum
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AcknowledgmentsIRRI is most gratefu
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The High Barind Tract: a challengin
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irrigation across the entire Barind
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Workshop synthesis
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and, with representatives from the
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Subsistence pressureLand pressure,
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HerbicidesEarlier efforts to introd
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volume). PVS is an effective way to
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Farmers may use wet-seeded DSR as a
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process and distributing HNPV to fa
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an NGO, have successfully collabora
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Workshop discussionParticipants dis
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How can we identify a short-duratio
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to fixed tenancy. The implication i
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Opportunities for improving ricepro
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that the reliability and productivi
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Table 1. Planting dates, direct-see
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Table 2. (A) Mean effect of fertili
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Table 5. On-farm trials of a drum s
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Upper toposequenceYield (t ha -1 )7
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and perennial grasses (e.g., Ischae
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Direct-seeded rice in the HighBarin
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Table 1. Sample selection for costs
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Table 4. Variations in weed managem
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Table 7. Labor requirements (days h
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Table 10. Farmer perceptions of dis
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Farmers (no.)1412108DSRWet-seededDr
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able commercially. Other OFT farmer
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Box 1. Farmers’ comments on DSRPo
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NotesAuthors’ addresses: M.A. Jab
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This paper explores the role of som
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(Olsen method, atomic absorption),
Page 82 and 83: Mean biomass (g m −2 )1,000.000Fi
Page 84 and 85: Fig. 3. Log rank abundance of weed
Page 86 and 87: attested by Fig. 2). Diversity in t
Page 88 and 89: Bangladeshi experiences with a drum
Page 90 and 91: Table 1. Grain yield and crop durat
Page 92 and 93: Table 5. Grain yield and growth dur
Page 94 and 95: ACEy = 0.0001x + 0.7089Yield (t ha
Page 96 and 97: Table 11. Partial budget analysis f
Page 98: ConclusionsDirect wet-seeded rice u
Page 101 and 102: A 178% increase in rice production
Page 103 and 104: Table 1. Components of yield gaps d
Page 105 and 106: Table 3. Weed management in Comilla
Page 107 and 108: Table 5. Weed management practices
Page 109 and 110: Table 7. Significance (P H o ) of t
Page 111 and 112: Since 2000, there has been an incre
Page 114 and 115: Identifying varieties for the High
Page 116 and 117: Table 1. Rice varieties bred by cli
Page 118 and 119: Table 2. Grain yield advantage of J
Page 120 and 121: Table 3. Plant height and crop dura
Page 122 and 123: Table 6. Summary of adoption and sp
Page 124 and 125: Freeman GH, Perkins J.M. 1971. Envi
Page 126: Opportunities for improving rabi cr
Page 129 and 130: Grain yield (t ha -1 )2.0npp1.5LSD
Page 131: In each of the plots, numbers of He
Page 135 and 136: Unit plot size was 10 10 m and the
Page 137 and 138: Yield (t ha -1 )5Straw4321GrainP (g
Page 139 and 140: Nodulation score3AControl Soil Mo P
Page 141 and 142: even at low levels of production. B
Page 144 and 145: Integration of chickpea and other r
Page 146 and 147: Grain yield (t ha -1 )3.02.51989-99
Page 148 and 149: Improved Improved Rainfed rainfed C
Page 150 and 151: Table 1. Preharvest and postharvest
Page 152 and 153: Greater resistance to Helicoverpa p
Page 154 and 155: wheat varieties). There is also sco
Page 156 and 157: Developing seed systems fordissemin
Page 158 and 159: This paper describes attempts to em
Page 160 and 161: seed needed to attain the recommend
Page 162 and 163: introduced to permit sale beyond th
Page 164: pesticides, inoculation with benefi
Page 168 and 169: for the rabi crop in 2001. Hence, b
Page 170: where farmers decided not to relay-
Page 174 and 175: Table 2. Mean dates of T. aman harv
Page 176 and 177: Table 4. Subsistence pressure and r
Page 178 and 179: Table 7. Subsistence pressure and r
Page 180 and 181: cite the absence of rent as a facto
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abi cropping in the HBT through ear
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Formulation and dissemination ofimp
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in India, for which shorter-duratio
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Applied researchOFTsAdaptive resear
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Table 1. Recommended package of pra
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Table 2. Grain yields (kg ha -1 ) o
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Table 4. Grain yields (t ha -1 ) of
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Table 6. Mean grain yields (t ha -1
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constraints present. This in itself
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Extending rabi cropping in rice fal
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Table 1. Estimates of rice area dur
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Yield (kg ha -1 )1,2001,00080060040
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Future disseminationThrough dialogu
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Direct seeding of rice andopportuni
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Table 1. Time of establishment and
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Table 3. Weed density and biomass a
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than in Central Java and many farme
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Proportion abundance (log scale)Ran
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CAN FIELD BE DRAINED?YesCAN FIELD B
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Johnson DE, Mortimer AM. 2005. Issu
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Zhao DL, Atlin GN, Bastiaans L, Spi
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