Formulas are used to calculate lime requirements to bring soils to target levels.  The major variables used in these calculations is target pH for the crop, buffer pH (BpH) which is derived from a soil test, and the neutralizing index (which is unique to the liming material.)   Buffer pH indicates which of the following?  

When taking a soil sample, often it is 7-9″ in depth, as it is the approximate zone of root activity.

Which areas should you avoid sampling when you are probing soil samples?

If you are sampling 11″ corn plant for nutrient deficiencies, you collect what part of the plant?

Example of plant mobile nutrients:

When should you take soil samples? (multiple answers)

When should you take soil samples? (multiple answers)

Potatoes grown on sand are great candidates for fertigation, and planning nutrient applications based on petiole sample results.  When does this testing begin in potato?

Potatoes grown on sand are great candidates for fertigation, and planning nutrient applications based on petiole sample results.  When does this testing begin in potato?

Determine the theoretical yield of HCl if 50.0 g of BCl3 and 31.2 g of H2O are reacted according to the following balanced reaction. A possibly useful molar mass is BCl3 = 117.16 g/mol. BCl3(g) + 3 H2O(l) → H3BO3(s) + 3 HCl(g)