What makes a plant grow stronger and healthier? This set of ten standardized nutrient solutions are formulated specifically for hydroponic plant studies. The solutions are used to make up a total plant nutrient mixture, plant nutrient mixtures lacking in calcium, magnesium, potassium, nitrogen, phosphorus, sulfur, iron and trace elements. Enough to make five liters of each mixture. Includes various laboratory demonstrations explained in the Plant Nutrition Studies handbook.