Subsoil Constraints for Crop Production

Introduction to subsoil constraints for crop production.- The geological, geomorphological, climatic, and hydrological background of Tropical Regoliths and hostile subsoils: The Brazilian landmass.- Soil acidity and acidification.- Salinity, Sodicity and Alkalinity.- Pyritic subsoils in acid sulfate soils and similar problems in mined areas with sulfidic rocks.- Physical subsoil constraints of agricultural and forestry land.- Subsoil and surface soil constraints of mined land and tailings.- Sand and gravel subsoils.- Soilborne pathogens.- Root systems of agricultural crops and their response to physical and chemical subsoil constraints.- Roots and beneficial interactions with soil microbes.- Nutrient acquisition with particular reference to subsoil constraints.- Water acquisition by roots from the subsoil: impact of physical constraints on the dynamics of water capture.- Deep soil carbon - characteristics and measurement with particular bearing on kaolinitic profiles.- Live subsoils: tropical regolith and biota interactions.- Subsoil constraints for crop production: recent advances, new technologies and priorities for further research.

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• Sociologia
• Ciência ecológica, a biosfera
• Ciência agrícola
• Florestação e silvicultura: prática e técnicas
• Ambiente
• Poluição e ameaças ambientais

Crop Production;Plant Growth;Soil Constraints;Abiotic Stress;Soil and Water Sciences;Irrigation Sciences