Jarrod O. Miller, Extension Agronomist, jarrod@udel.edu University of Delaware recommends potassium (K) applications for low (0-70 ppm) and medium (71-140 ppm) soil test categories. However, soils in Delaware may have K that is not accounted for in a normal soil… Continue Reading
Jarrod O. Miller, Extension Agronomist, jarrod@udel.edu Potassium (K) deficiencies have been showing up in a few of our fields. Like nitrogen (N), leaves will start to yellow at the bottom of the plant, but the yellowing should extend along the… Continue Reading
Amy Shober, Professor and Extension Specialist, Nutrient Management and Environmental Quality, ashober@udel.edu; Jarrod Miller, Assistant Professor and Extension Specialist, Agronomy, jarrod@udel.edu It has been decades since soil test correlation and calibration research was a priority in the United States, but… Continue Reading
Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu Growers will apply most (>90%) of their plant nutrients for vegetable crops as soil applications (preplant, sidedressed, fertigated) based on soil tests and crop nitrogen needs. To monitor vegetable nutrient status during… Continue Reading
Jarrod O. Miller, Extension Agronomist, jarrod@udel.edu and Amy Shober, Extension Nutrient Management and Environmental Quality Specialist; ashober@udel.edu Summary: With a grant funded by the Delaware Soybean Board, we studied whether split application of K for soybeans would benefit yield on… Continue Reading
