Rainfed rice - IRRI books - International Rice Research Institute

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Soil Quality and Land Suitability Classes for Different Rainfed Rice Ecosystems S oil is a natural non-renewable resource and medium for plant growth. Functions of the soil Provides physical conditions for root growth and water storage. Source of essential plant nutrients. Harbors microbes affecting nutrient cycling. Acts as an environmental filter to control the quality of both ground and runoff water. Source of gaseous emission to the atmosphere. Has the capacity to sustain biological productivity. Can maintain environmental quality. Supports life forms dependent on it. Soil characteristics Improper management of soil resource leads to degradation of the soil, resulting in poor productivity. Soil quality assessment is, therefore, an important factor for sustainable use of soil resources. 165
RAINFED RICE A SOURCEBOOK OF BEST PRACTICES AND STRATEGIES IN EASTERN INDIA 166 Land suitability classes Based on the different soil characteristics, land suitability classes for different rainfed rice ecosystems have been identified and shown in the following tables. Soil characteristics common to all rainfed rice ecosystems Characteristics/ factors Depth of impermeable layer (cm) >90 Rockiness (%) 0 Surface stones (m apart) >100 Electrical conductivity (dSm -1 in saturation extract) 16 Organic carbon (%) in surface soil Low-activity clay >1.5 Calcareous soil >0.8 CLASSES Suitable Moderately Marginally Unsuitable but Potentially suitable suitable potentially suitable unsuitable >50 30 0.8 20 10
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The International Rice Research Ins
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RAINFED RICE A SOURCEBOOK OF BEST P
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vi Foreword About 45% of the world
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RAINFED RICE A SOURCE BOOK OF BEST
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Utilisation and Management of Natur
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Rice Biodiversity and Genetic Wealt
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32 RAINFED RICE A SOURCEBOOK OF BES
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Socio-Economic Constraints in Rice
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Developing Sustainable Technologies
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Agro-Ecosystem Analysis for Rainfed
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Agro-Ecosystem Analysis for Rainfed
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Agro-ecosystem analysis Agro-ecosys
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GIS in extrapolation of location-sp
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Rice-growing sub-ecosystems in Sult
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Influence of Agro-Ecosystem Compone
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Principles for Improving and Stabil
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Water management Adopt efficient wa
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Major Cropping Systems and Their Ma
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Major Cropping Systems and Their Ma
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etter in the broadcast and row-seed
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Comparative Analysis of Different C
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Comparative Analysis of Different C
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Flood-prone areas Flood-prone areas
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Boro Rice Cultivation B oro rice cu
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Integration of Boro with DWR When t
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Management of Rice in Flood-Prone A
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Transplant 35-45-day-old seedlings
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Delayed transplanting Seedbed prepa
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Preparing a site Field dikes 1. Pre
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5. Put the feed in hanging trays in
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Crop Establishment Practices in Rai
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11. For medium-duration varieties,
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Crop Establishment Practices in Rai
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Comparative Analysis of Direct Sowi
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Machine transplanting Manual and se
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Direct sowing vs transplanting: a c
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The beushening process Beushening S
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Page 124 and 125: Tillage Practices and Implements fo
Page 126 and 127: Tillage implements Function Bullock
Page 130 and 131: Improving the Yields of Traditional
Page 132 and 133: Threats to the erosion of tradition
Page 134 and 135: Farmers’ Participatory Plant Bree
Page 136 and 137: Farmers' Participatory Plant Breedi
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Page 140 and 141: Identification of Donors for Rice B
Page 142 and 143: Rainfed lowlands Varietal needs for
Page 144 and 145: Identification of Donors for Rice B
Page 146 and 147: Varietal Development: Evaluation an
Page 152 and 153: Trends in varietal improvement In t
Page 154: Some small increases can also be ac
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Page 163 and 164: Rainfed Rice Seed Production System
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Page 169 and 170: Influence of High-Quality Seeds on
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Page 179 and 180: Dealing with Decline in Soil Fertil
Page 189 and 190: Integrated Nutrient Management What
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Page 197 and 198: Comparative Analysis of Different N
Page 201 and 202: Comparative analysis of different p
Page 203: Comparative analysis of different m
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Page 217 and 218: Indigenous Rainwater Management R a
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RAINFED RICE A SOURCEBCOK OF BEST P
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Water Saving, Recycling and Sequent
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220 RAINFED RICE A SOURCEBOOK OF BE
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Weed Management
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Cost Effectiveness of Weed Manageme
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Pest Control Alternatives for the R
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Diseases affecting grains Blast Bro
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Pest control in rainfed upland rice
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Pest Control Alternatives for the R
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Gall midge Summer ploughing. Timely
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Disease Management Strategies I n n
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Sheath blight (caused by Rhizoctoni
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Disease Management Strategies Contr
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To know the intensity of the rat po
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Rat Population Dynamics and Managem
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Insecticide Use, Precautions and In
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Insecticide Use, Precautions and in
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First-aid precautions Insecticide U
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hepatic carcinoma; acute liver dama
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Effects of Pesticides on Humans and
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Mechanical practices on IPM Hand-pi
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Participatory Farming Systems Techn
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Annexes
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290 Production staff Editors Nilam
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Rainfed rice - IRRI books - International Rice Research Institute

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