June 25, 2020 | By Rupp Seeds
Nitrogen (N), phosphorous (P), and potassium (K) are the three most important soil-supplied nutrients and are referred to as essential or macro nutrients. Other nutrients are called micro nutrients because they are required in much lower amounts. These nutrients are calcium (Ca), magnesium (Mg), iron (Fe), boron (B), manganese (Mn), zinc (Zn), copper (Cu), and molybdenum (Mo).
Any condition that restricts root growth, such as compaction, water-saturated soils, or insect feeding, can lead to nutrient deficiency because the roots cannot reach sufficient levels of nutrients to sustain normal plant growth and development.
Soybean leaf yellowing occurs primarily because of a nutrient deficiency. However, diseases in soybean, such as sudden death syndrome and brown stem rot, can resemble nutrient deficiency.
Learn about the symptoms, causes, how to identify, and the treatments of nutrient deficiencies and diseases in this issue of SeedScoop
Mid-Season Soybean Nutrient Deficiency