Soil Nutrient Analysis: Nitrogen, Phosphorus, and ...
Secure samples on a tabletop shaker and shake for 1 min. 2. Extraction of Phosphorus and Potassium. Turn on the balance, set a weigh boat on the top, and zero the balance. Use a spatula to weigh out 2 g of soil (dried and sieved) and transfer into a labeled 100mL beaker.