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?

You apply 18,000 gallons of your very run of the mill manure to your crop of corn pre-plant, incorporating it after application.  You forgot however how much starter you used when you put this rate on.  You check the NPM Factsheet and see that you would have 7 lbs of N/1000 gallons in your incorporated manured field.  How many lbs of N are from the manure?

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)

Every field is completely uniform in it’s lime requirements.

How much 9-23-30 would you apply per acre if you wanted 27 units of N per acre for a starter on your corn crop?

If you had one wheel barrow of poop (200 lb) to use on your large 1/2 acre garden, would you get it from the cow barn, pig barn or chicken coop for your sweet corn?

The lime reaction, the amount of time required for the pH to reach target levels, is generally:

What color does the Phosphorus deficiency routinely appear as in deficient crops?

The optimum (target) pH for a soil depends on the crops that will be grown.  Once a desired pH is reached through liming, the pH will remain at that level for a relatively long time.  An exception to this is ___________________ soils which tend to need lime more frequently at lower rates.