SLIDES\VineBalance\UnifSymp98.pptDavid R. Smart•[email protected]•2142 RMI North•Monday 9:30-11:30•754-7143/754-7144VEN 101C 20091) Economic considerations2) Regulatory considerations3) Climatic considerations4) Soils considerationssoil surveysoil physical propertiessoil chemical propertiesSite Evaluation:Soil Evaluation:•Chemical Properties•pH, -log[H+] •Extractable Ca, Mg, K, Na •Ca:Mg Ratio and base saturation •Salinity and sodicity•Heavy metal content•Aluminium concentrationSoil Evaluation:•Chemical Properties•Lime and lime requirement •Gypsum and gypsum applications •Electrical Conductivity (ECe) •Exchangeable Sodium Percentage •Leaching and leaching requirement Objectives of Chemical AnalysisObjectives of Chemical Analysis•Identify chemical hazards that will impact or preclude the production of grapes. •Assess overall soil fertility status.•Identify soil properties that will require preIdentify soil properties that will require pre-plant remediation.•Identify soil properties that will require onIdentify soil properties that will require on-going going management to avoid problems.•Facilitate selection of ripping depth, rootstocks, Facilitate selection of ripping depth, rootstocks, vine spacing and trellis design.
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SLIDES\VineBalance\UnifSymp98.pptNeed ShakeRidge Chem Analysis hereThe concentration of a nutrient element in soil is often given as parts per million, weight per mass, solution concentration.Mass: 1 ppm = 1 g gsoil-11 g g-1= 1 mg kgsoil–1mg kgsoil–1x BD = kg m-3= g cmsoil-3(x depth) Molar equivalents: meq 100 gsoil-1eq = mole weightcmolc100 g-1meq charge 1000 g-1meq L-1(SP extracts)1 cm3H2O 1 g