Section 1: Chemistry of acid soils.- The chemical properties of acid soils with emphasis on soils of the humid tropics.- Solubility of aluminium and silicon in acidified spodosols: Evidence for soluble aluminosilicate.- Solid phase control of aluminium activity in an artificial plant growth medium containing hydroxy-Al-montmorillonite.- Predicting toxicity of reactive "solution" aluminium using kinetic speciation.- Chemical and minerological properties and soil solution composition of acid soils from the South Pacific Islands.- Some effects of chemical weathering in three cultivated acid sulfate soils in Sweden.- Fossil acid sulfate soils in Hokkaido, Northern Japan.- Chemistry and fertility of acid andisols with special reference to subsoil acidity.- Exchangeable cations and the pH-independent distribution of cation exchange capacities in Spodosols of a forested watershed.- Salt absorption in gypsum amended acid soils.- Soil model of iron phosphate solubility.- Characteristics of soil acidity of paddy soils in relation to rice growth.- Zinc fractionation in a Cecil soil as influenced by organic acid treatments.- Geographic relationships between soil and water acidity, soil-forming factors, and acid rain.- Effect of acid rain and ozone on soil and secondary needle nutrients of loblolly pine.- Deposition of anthropogenic sulphur dioxide on soils and resulting soil acidification.- Section 2: Fertility of acid soils.- Fertility of acid soils.- Processes of soil acidification during nitrogen cycling with emphasis on legume based pastures.- Critical ammonium: nitrate uptake ratios for Douglas-fir determining rhizosphere pH and tree mortality.- Ecosystem-level significance of acid forest soil.- Plant-soil interactions associated with acid weathered soils.- Effect of phosphorus supply to the surface roots of wheat on root extension and rhizosphere chemistry in an acidic subsoil.- Effects of phosphate fertilization, lime amendments, and inoculation with VA-mycorrhizal fungi on soybeans in an acid soil.- Tolerance to acid soil conditions of the velvet beans Mucuna pruriens var. utilis and M. deeringiana. I. Root development.- Root growth of peanut cultivars and soil acidity.- Soil and soil solution property effects on root growth of aluminium tolerant and intolerant wheat cultivars.- A rapid method for predicting the lime requirement of acidic temperate soils with widely varying organic matter contents.- Effects of sample depth, and of lime and phosphorus applications on soil test levels in pasture soils.- Effects of lime additions on the availability of phosphorus and sulphur in some temperate and tropical acid soils.- Use of lime, gypsum, ana their combinations to improve nodulation and yield of groundnut in an acidic soil.- The effect of phosphate rock dissolution on soil chemical properties and wheat seedling root elongation.- Calcium magnesium imbalance in clovers: A cause of negative yield response to liming.- Soil acidity and its interactions with phosphorus availability for a range of different crop types.- Efficiency of rock phosphate as phosphatic fertilizer to rice in acid soil of Karnataka, India.- Acid soil profiles of the semiarid and subhumid tropics in Central and West Africa.- Nitrogen in soil and cotton growth as affected by liming and nitrogen fertilizer.- Liming and molybdenum effects on nitrogen uptake and grain yield of corn.- Studies on nutrition of rice cultivars under simulated acidic conditions with particular reference to iron.- Interaction of soil zinc, calcium, and pH with zinc toxicity in peanuts.- Effect of boron, lime and their residue on yield of cauliflower, leaf composition and soil properties.- Soil acidity effects on premature germination in immature maize grain.- Section 3: Management of acid soils.- The management of acid soils.- The management of soil acidity for sustainable crop production.- Characteristics of acid soils in Thailand: A Review.- Soil spatial variability and steep pasture management considerations in an acid soil environment.- Residual effects of natural bush Cajanus cajan and Tephrosia Candida on the productivity of an acid soil in southeastern Nigeria.- Old tree root channels in acid soils in the humid tropics: Important for crop root penetration, water infiltration and nitrogen management.- Effect of incorporated green manure crops on subsequent oat production in an acid, infertile silty loam.- The injection of slurries of lime, associated with deep tillage, to increase wheat production on soils with subsoil acidity.- Growth of vineyard roots into segmentally ameliorated acidic subsoils.- Long-term effects of lime in extensive pasture areas of Australia.- A field comparison of lime requirement indices for maize.- Phosphorus-lime interaction in a strongly acid upland soil grown to rice in Cavinti, Philippines.- Alfalfa yields and quality as influenced by subsurface application of phosphorus, potassium and limestone.- Establishment and growth of Vigna parkeri on an acid Florida spodosol in response to lime and phosphorus.- Effects of limestone and gypsum application to a Malaysian ultisol on soil solution composition and yields of maize and groundnut.- Use of gypsum, phosphogypsum and fluoride to ameliorate subsurface acidity in a pasture soil.- Response of upland rice and common bean to liming on an oxisol.- The effect of lime and vegetation management on non-wetting behaviour of an acid siliceous sand.- Efficiency of rock phosphate in rice-groundnut cropping system in acid soils of coastal Karnataka, India.- Influence of phosphate rock sources and rates on rice and common bean production in an oxisol.- Acidification of soil in Alberta by nitrogen fertilizers applied to bromegrass.- Acidification of forest soil by elemental sulphur dust.- Section 4: Microbial relations in acid soils.- Soil acidity and the microbial population: Survival and growth of bacteria in low pH.- Response of Rhizobium leguminosarum bv. phaseoli to acidity.- Increased yield in annual species of Medicago grown in acidic soil in response to inoculation with acid tolerant Rhizobium meliloti.- Rhizobium meliloti inoculation of alfalfa selected for tolerance to acid aluminium-rich soils.- Effects of pH and Al3+ activity on survival of Rhizobium leguminosarum bv. trifolii in a simple solution and on nodulation of red clover in acid soils.- Tolerance of winged bean (Psophocarpus tetragonolohus) and its symbiotic system to soil acidity.- Effects of soil acidity factors on interaction of chickpea (Cicer arietinum L.) genotypes and Rhizobium strains: Symbiotic N-fixation, grain quality and grain yield in acid soils.- The effect of lime, nitrogen and Rhizobium inoculation on dry top production, nutrient concentration and nodulation of subterranean clover grown on an acid siliceous sand.- Growth and N2 fixation response of arrowleaf clover to manganese and pH in solution culture.- Symbiotic soybean in acidified soil.- Coating birdsfoot trefoil (Lotus corniculatus L.) seed with CaCC3 and rock phosphate: Early seedling development in controlled environments.- Isolation, characterization and associative N-fixation of acid-tolerant Azospirillum brasilense strains associated with Eleusine coracana in low pH-Al-rich acid soil.- Interaction studies between Rhizobium leguminosarum and Meloidogyne incognita on pea (Pisum sativum L.) grown under different concentrations of molybdenum.- Control of Meloidogyne incognita and Bacillus thuringiensis.- Section 5: Physiology/Biochemistry of acid stress tolerance in plants.- Mechanisms of adaptation of plants to acid soils.- The aluminium signal: New dimensions to mechanisms of aluminium tolerance.- Identity of the rhizotoxic aluminium species.- Predicting toxic concentrations of manganese in acid soils.- Short term responses of soybean roots to aluminium.- The effects of short and long term aluminium treatment on potassium fluxes in roots of an aluminium sensitive cultivar of barley.- Aluminium decreases root growth and calcium and magnesium uptake in Picea abies seedlings.- Calcium and magnesium amelioration of aluminium toxicity in Al-sensitive and Al-tolerant wheat.- The role of magnesium and calcium in alleviating aluminium toxicity in wheat plants.- Investigating the relationship between aluminium toxicity, root growth, and root-generated ion currents.- An ultrastructural study of the inhibition of mucilage secretion in the wheat root cap by aluminium.- Identification of aluminium-tolerant protoplasts in the original root protoplast population from several plant species differing in aluminium tolerance.- Behaviour of inbred and hybrid maize lines in the presence of aluminium as evaluated by some physiological and biochemical parameters.- Nitrate and ammonium uptake and solution pH changes for Al-tolerant and Al-sensitive sorghum (Sorghum bicolor) genotypes grown with and without aluminium.- Effects of silicon on growth and mineral composition of sorghum (Sorghum bicolor) grown with toxic levels of aluminium.- Biochemical mechanism of the toxicity of aluminium and the sequestration of aluminium in plant cells.- Biochemical basis of aluminium tolerance in plant cells.- Induction of protein synthesis by aluminium in wheat (Triticum aestivum L.) root tips.- Organic acid and free proline accumulation and nitrate reductase activity in sorghum (Sorghum bicolor) genotypes differing in aluminium tolerance.- Biochemical studies of peanut cells grown in suspension cultures treated with aluminium.- Growth of peanut cells in suspension cultures treated with aluminium.- Changes in pH of legume cell suspension culture media containing aluminium.- Section 6: Identification of acid tolerant plants.- Identifying plants adaptable to low pH conditions.- Evaluation of solution culture techniques for studying aluminium toxicity in plants.- The effects of Aluminium and pH on the growth of a range of temperate grass species and cultivars.- Aluminium tolerance of forage species.- Short-term bioassay of Lotus corniculatus soil acidity tolerance.- Evaluating sweet potato tolerance to aluminium toxicity: Comparison of rapid test method and field results.- Pearl millet and sorghum tolerance to aluminium in acid soil.- Differential responses of sorghum to aluminium in nutrient solution and acid soil.- Field screening of rice cultivars for growth, yield and nutrient uptake in acidic soil.- Screening for low-phosphorus tolerance among tomato strains.- Adaptation of shrub legumes to acid soils.- Morphology, root conductivity, and mineral accumulation of Northwest U.S. tree species in response to acid deposition in artificial soil.- Experimental system for investigations of aluminium toxicity in fruit trees.- Section 7: Genetics/Breeding of acid tolerant plants.- Genetics of acid tolerant plants.- Breeding for tolerance to aluminium toxicity in wheat.- Selection for tolerance and susceptibility to aluminium within Trifolium repens L..- Acid soil tolerance mechanisms for juvenile stage sorghum (Sorghum bicolor).- Intercrossing methods, mutagenesis treatments, and tissue culture techniques for expanding the genetic diversity of flatpea, Lathyrus sylvestris L..- Aluminium tolerance of Triticum aestivum L. populations related to plant-induced pH changes of nutrient solution.- Protein profiles in roottips of two wheat (Triticum aestivum L.) cultivars with differential tolerance to aluminium.- Aluminium tolerance in wheat: Analysis of polypeptides in the root apices of tolerant and sensitive genotypes.- Inheritance of acid-soil tolerance in sorghum (Sorghum bicolor) grown on an ultisol.- Leaf mineral element concentrations in sorghum Sorghum bicolor) hybrids and their parents grown at varied aluminium saturations on an ultisol.