Transcript No Slide Title

Plant Uptake
Animals
Plant Residue
Forage toxicity at > 5 ppm
Crop Removal
Availability
Man
Coal Combustion
Sewage Sludge
O.M.
Soil Solution
Steel Industry
Mining
Mo Fertilizers
Na2MoO4
(NH4)2Mo2O7
MoO3
MoS2
Adsorption:
Fe and Al
oxides at
low pH
Parent Material
Precipitated Forms
Fe2(MoO4)3
PbMoO4
CaMoO4
Igneous rocks,F Feldspar
and Ferromagnesian,
minerals, Sedimentary
rocks
Plant Uptake
Animals
Nitrate Reductase (NO3- to NO2-),
Forage toxicity at > 5 ppm
Fixation of N2 by Nitrogenase
Crop Removal
Man
Coal Combustion
Sewage Sludge
Soil Solution
Dominant Species: MoO42-, HMoO4-,
H2MoO4
Steel Industry
Mining
pH>4:MoO42-, HMoO4pH<4: H2MoO4, MoO22+
Parent Material
Igneous rocks,F Feldspar
and Ferromagnesian,
minerals, Sedimentary
rocks
Plant Uptake
Plant Residue
Nitrate Reductase (NO3- to NO2-),
Fixation of N2 by Nitrogenase
O.M.
Soil Solution
Mo Fertilizers
Na2MoO4
(NH4)2Mo2O7
MoO3
MoS2
Dominant Species: MoO42-, HMoO4-,
H2MoO4
pH>4:MoO42-, HMoO4pH<4: H2MoO4, MoO22+
Plant Uptake
Nitrate Reductase (NO3- to NO2-),
Fixation of N2 by Nitrogenase
Soil Solution
Dominant Species: MoO42-, HMoO4-,
H2MoO4
pH>4:MoO42-, HMoO4pH<4: H2MoO4, MoO22+
Adsorption:
Fe and Al
oxides at
low pH
Precipitated Forms
Fe2(MoO4)3
PbMoO4
CaMoO4
Plant Uptake
Nitrate Reductase (NO3- to NO2-),
Availability
Increases with
increasing pH and soil
moisture
Mass flow or diffusion
Fixation of N2 by Nitrogenase
Soil Solution
Dominant Species: MoO42-, HMoO4-,
H2MoO4
pH>4:MoO42-, HMoO4pH<4: H2MoO4, MoO22+