Soils
	Soil water
	Soil horizons
	Soil texture
	Identifying the texture by feeling the soil
	Soil structure
	Soil structure
	Type of root system
	Soil related constraints that impede agriculture
	Chemical constraint – unsuitable pH
	References

• LU1:Yellow Submarine-PDF tutorial
• Gout and Other Crystal Diseases
• Gout and Other Crystal Diseases
• Lecture 3: Descriptive Epidemiology
• LU3: Hand-PDF tutorial
• PDF Tutorials (Intermediate): Temple of Kukulkan - PDF file