This table shows the means (mass flow, diffusion or interceptive root growth) by which nutrients are taken up through the roots.
Learn how to sustainably and ecologically manage your inputs and fertilizers to produce the highest quality soybeans.
Plant tissue testing, as done by most labs, is not as informative as water-soluble soil tests. Tissue tests only test the soluble contents of the cells.
Foliar feeding is a complex subject, but in general it allows you to supply small amounts of deficient elements to plants (through their leaves, primarily) at the time they need them. Fertilizers applied to the soil before planting may not be available to the plants when they need them most—during peak growth and pod fill. […]
If a plant is not getting the proper amounts of nutrient elements, it may develop certain symptoms, abnormal colors or growth deformities.
Manures are an excellent source of nitrogen.
Soybean production factors out as follows: a 50-bushel crop takes 280 pounds of nitrogen.