Proceedings of Symposium on Paddy Soils

Front Matter....Pages N3-ix
Soil Factors that Influence Rice Production....Pages 1-19
Some Characteristics of High Fertility Paddy Soils....Pages 20-30
Rice Soils for Food Production....Pages 31-41
Recent Progress in Studies of Soil Structure, and its Relation to Properties and Management of Paddy Soils....Pages 42-58
Some Aspects of the Physical Chemistry of Paddy Soils....Pages 59-94
Oxidation-Reduction Properties of Paddy Soils....Pages 95-106
The Role of Inorganic Redox Systems in Controlling Reduction in Paddy Soils....Pages 107-117
Fertility of Paddy Soils in Tropical Asia....Pages 118-128
On the Genetic Classification of Paddy Soils in China....Pages 129-138
The Classification of “Paddy Soils” as Related to Soil Taxonomy....Pages 139-150
Principal Types of Low Yield Paddy Soil in China....Pages 151-159
The Fertility and Fertilizer use of the Important Paddy Soils of China....Pages 160-170
Evaluation of Nitrogen Fertility and Increasing Fertilizer Efficiency in Wetland Rice Soils....Pages 171-206
Cultivation and Application of Green Manure in Paddy Fields of China....Pages 207-219
Cropping System in Relation to Fertility of Paddy Soils in China....Pages 220-230
Some Laboratory Observations on the Formation of Black Layer in the Recently Reclaimed Saline Soils under Rice Cultivation....Pages 231-234
Reducing Organic Substances Responsible for Removal of Fe (III) and Mn (IV) from Subsurface Horizon of Lowland Rice Soil....Pages 235-250
Voltammetric Determination of Reducing Substances in Paddy Soils....Pages 251-254
Chemical Equilibria of Sulfides as Studied with a Hydrogen Sulfide Sensor....Pages 255-257
Determination of Redox Potential (Eh) by Depolarizing Curve Method....Pages 258-261
A Preliminary Study On Properties Of Organo-Mineral Complex Of Paddy Soils in Taihu Lake Region....Pages 262-268
Determination of Lime Potential of Paddy Soils with Two Ion-Selective Electrodes....Pages 269-272
The Availability Of Micronutrients in Paddy Soils and its Assessment by Soil Analysis Including Radioisotopic Techniques....Pages 273-289
A Preliminary Study on Specific Adsorption of Cu Ion by Paddy Soils of Southern Jiangsu Province....Pages 290-295
Studies on Accumulation of Strontium-90 in Paddy Soils....Pages 296-301
Residual BHC in Paddy Soils and its Contamination to Rice....Pages 302-305
Decomposition of Plant Materials in Relation to their Chemical Composition in Paddy Soil....Pages 306-310
Some Physical Properties of Paddy Profiles in Taihu Lake Region....Pages 311-315
Hydrologic Status of Paddy Fields During Rice-Growing Period....Pages 316-319
Release of Nitrogen from Decomposing Legume Roots and Nodules....Pages 320-322
Investigation on Ecological Distribution of Fungi in Paddy Soils....Pages 323-329
Mechanisms of Bacterial Iron-Reduction in Flooded Soils....Pages 330-343
Investigation on Nitrogen-Fixing Bacteria in Rice Rhizosphere....Pages 344-347
Biological Nitrogen Fixation Associated with Wetland Rice....Pages 348-355
Studies on the Preparation of Dried Inoculum of Blue-Green Algae and its Application in Paddy Field....Pages 356-362
Preliminary Studies on Process of Nitrogen Excretion by Azolla....Pages 363-368
On Ecological Distribution of Bacteria in Paddy Soils....Pages 369-374
Iron Toxicity in Rice Plants and Nitrogenase Activity in the Rhizosphere as Related to Potassium Application....Pages 375-380
Principles of Classification as Applied to Paddy Soils....Pages 381-386
Classifying Rice Soils on the Basis of their Physiological Characteristics....Pages 387-391
The Recent Trend of Paddy Soil Classification in Japan....Pages 392-396
Paddy Soils in Chengdu Plain and their Classification....Pages 397-404
The Application of Cluster Analysis to the Material Classification of Paddy Soils in Taihu Lake Area....Pages 405-408
Evolution and Development of Alluvial Paddy Soils in Zhujiang Delta....Pages 409-413
On the Classification of Basic Categories of Paddy Soils in Taihu Lake Region....Pages 414-418
Characteristic Features of Paddy Soils of Japan....Pages 419-427
On the Classification and use of Some Dark Clayey Paddy Soils in China....Pages 428-438
On the Genesis, Characteristics and Utilization of the Acid Sulphate Paddy Soil in China....Pages 439-443
Some Chemical Properties of Soils from the Taoyuan Prefecture, China, in Particular their Fertility....Pages 444-448
On the Characteristics of Leaching and Accumulation of Chemical Elements in Two Eutric Paddy Soils in Taoyuan County, Northern Hunan Province....Pages 449-453
Effects of Neotectonic Movement on Development of Paddy Soils in Changjiang Delta....Pages 454-460
Characteristics of Geographical Distribution of Fertile Paddy Soil in Fujian Province....Pages 461-465
Micromorphological Features as the Indication of the Fertility of Paddy Soils....Pages 466-470
Differentiation of Iron Oxide in Paddy Soils in Taihu Lake Region....Pages 471-474
Changes in Clay Minerals in the Genesis of Paddy Soils....Pages 475-479
Clay Minerals of Paddy Soils in Taihu Lake Region....Pages 480-485
On the Characteristics of Fe-Organic Coating in Paddy Soils....Pages 486-492
The Magnetic Susceptibility Distinction of Paddy Soils in Taihu Lake Region....Pages 493-497
Effect of Long-Term Rice Cultivation on Some Properties of Soda Solonchaks at Qian Gorlos Irrigation Region of Jilin Province in China....Pages 498-501
On the Tendency of Organic Matter Accumulation in Paddy Soil Under Triple Cropping System in Suburbs of Shanghai....Pages 502-508
Stagnancy of Water in Paddy Soils Under the Triple Cropping System and its Improvement....Pages 509-516
Drainage of Paddy Soils in Taihu Lake Region....Pages 517-523
Improving Rice Seedling Emergence in Flooded Soil by Use of Calcium Peroxide....Pages 524-530
Rice Fertilization and Wastewater Nutrients Recycling....Pages 531-540
The Study of Nitrogen Distribution Around Rice Rhizosphere....Pages 541-546
Fertilizer Management of Paddi Soils with Physical Constraints....Pages 547-559
Rationalization of Fertilizer Application to Rice in a Cool Environment....Pages 560-569
Transformation and Distribution of Organic and Inorganic Fertilizer Nitrogen in Rice and Soil System....Pages 570-577
Transformation of Fertilizer, Straw and Soil Nitrogen in Paddy Soil....Pages 578-587
Nitrogen Efficiency Study Under Flooded Paddy Conditions: A Review of Inputs Study I....Pages 588-596
The Fate of Nitrogen Fertilizer in Paddy Soils....Pages 597-602
Potassium Status of Paddy Soils in Some Countries of South and East Asia....Pages 603-616
On the Potential of K-Nutrition and the Requirement of K-Fertilizer in Important Paddy Soils of China....Pages 617-620
Biochemical and Nutritional Diagnosis of K-Deficiency of Paddy Rice Plants with regard to Soil Fertility....Pages 621-627
Sulphur Content and Distribution in Paddy Soils of South China....Pages 628-634
The Status of Microelements in Relation to Crop Production in Paddy Soils of China: III. Zinc....Pages 635-640
A Report on the Saling-Sodic Soils of Baigezhuang and the Zinc Deficiency of Paddy Crop....Pages 641-645
Some Methods to Minimize Zinc Deficiency in Transplanted Wetland Rice....Pages 646-655
Development of the Zinc Extension Component for Irrigated Rice in the Philippine Masagana 99 Production Program....Pages 656-670
On Zinc Deficiency of Paddy Soils....Pages 671-677
Recovery of Fertilizer-Nitrogen by Rice Grown in a Greenhouse Under Varying Soil- and Climatic Conditions....Pages 678-688
Effect of Water Conditions and Organic Matter on Modulus of Rupture of Paddy Soils....Pages 689-693
The Effect of Water-Stable Aggregates in Various Sizes on Air and Water Regime of Soils....Pages 694-698
Influence of Transformation of Iron Oxides on Soil Structure....Pages 699-703
Determination of Stability Constant of Mn (11)-Complex by Voltammetric Method....Pages 704-708
Determination of pH of Paddy Soils in Situ....Pages 709-715
Mercury Pollution of Some Paddy Soils....Pages 716-718
Effect of Nitrogen Sources on Some Physiological Characteristics of Azolla....Pages 719-725
Studies on Nitrogen Fixation by Association of Bacteria with Rice Root....Pages 726-733
Geographical Distribution of Paddy Soils in China....Pages 734-740
Characteristics of Some Types of Paddy Soil in Northeast China....Pages 741-745
The Formation and Characteristics of Cold Spring Paddy Soil....Pages 746-749
Genetic and Anthropogenic Characteristics of Paddy Soils Derived from Swampy Land in Lixiahe District, Jiangsu Province....Pages 750-753
Geochemical Characteristics of Some Transitional and Rare Earth Elements in Paddy Soils of Red Earth Region, Guangdong Province....Pages 754-758
Preliminary Studies on Primary Minerals of Some Paddy Soils in Taihu Lake Region....Pages 759-764
Double Cropping of Rice in Triple Cropping System and Soil Fertility....Pages 765-768
Characteristics of High-Yield Paddy Soils in Suburbs of Shanghai....Pages 769-774
On the Forming of Waterlogged Condition in the Cultivated Horizon of Paddy Soils in Shanghai During Dry Farming Period and the Approach to its Elimination....Pages 775-779
A Comparative Study on Methods of Tillage of Paddy Soils in Taihu Lake Region....Pages 780-785
Effect of Rice Planting on Improvement and Utilization of Saline Soils in Tarim Basin....Pages 786-788
On Rice Nutrient Disorder and its Diagnosis in China....Pages 789-792
Characteristics of Nitrogen Mineralization of Paddy Soils and their Effect on the Efficiency of Nitrogen Fertilizer....Pages 793-799
Uptake of Nitrogen by Rice Plant from Straw Manure, Urea and Soil....Pages 800-804
Phosphorus Balance on Paddy Soils Reclaimed from the Salinized Waste Land, Northern Jiangsu....Pages 805-808
A Study on the Responses to Fertilizer Potassium on Paddy Soils in Guangdong Province....Pages 809-815
Iron and Chromium Uptake by Crops on Well Drained Soils and on Poorly Drained Wetland Soils....Pages 816-824
The Status of Microelements in Relation to Crop Production in Paddy Soils of China: I. Boron....Pages 825-831
The Status of Microelements in Relation to Crop Production in Paddy Soils of China: II. Molybdenum....Pages 832-836
Effect of Nitrapyrin on the Inhibition of Nitrification in Some Paddy Soils of China....Pages 837-844
Effect of Soil Fertility on the Growth and Yield of Rice....Pages 845-855
China and the International Community of Soil Science....Pages 856-857
Soils and People....Pages 858-861
Some Remarks on the Development of Soil Science in China....Pages 862-864