SUBJECT
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Industrial applications
3
Land
3
Mathematical models
3
Plants, Effect of nitrogen on
3
Road drainage
3
Soil acidity
3
Soil chemistry
3
Soil physics
3
Soil remediation
3
Subgrades
3
Sugar-cane
3
Trace elements
3
Water quality
3
Air quality
2
Algae
2
Drainage
2
Embankments
2
Fertilizers
2
Forests and forestry
2
Geomorphology
2
Growth (Plants)
2
Heavy metal content
2
Heavy metals
2
Humic acid content
2
Instruments
2
Land use, Rural
2
Leaching
2
Magnesium content
2
Methods
2
Phytogeography
2
Piling (Civil engineering)
2
Pollution
2
Radioisotopes
2
Road materials
2
Social aspects
2
Soil absorption and adsorption
2
Soil biology
2
Soil ecology
2
Soil erosion
2
Soil microbiology
2
Soil research
2
Soils, Salts in
2
Sulphur content
2
Technique
2
Thermal properties
2
Trace element content
2
Trafficability
2
Varieties
2
Zinc content
2
Acid soils
1
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