D. R. Hoagland

1884 – 1949

• Fertilizer problems and analysis of soils in California
• Fertilizer problems and analysis of soils in California
• Fertilizers, soil analysis and plant nutrition
• Lectures on the inorganic nutrition of plants
• Soil analysis and soil and plant interrelations
• The effect of several types of irrigation water on the pH value and freezing point depression of various types of soils
• The water-culture method for growing plants without soil