Well, I had a good conversation with an agronimist at the NC dept of ag today, about the conversions and values of the soil tests reports. I found out that indeed there are conversion factors available on the website there to allow for conversions to ppa, and therin an ability to estimate what may be needed to add to soil.
The soil tests that I receive back from my state's div are making me think more... since the only recommendations made are for lime, and a few others, however the is no recommendation for calcium. There are many values reported.... not as many recommendations.
The Agronimist states that if soil pH was in line for the paticular crop then the other internal values - like Ca- should in in line with what is needed for the plant. I thought that this was interesting --however as a blanket statement, I think there are some conflicts... she also told me that my Ca was low as well as Mg [magnesium].
Anyway, it was a productive conversation!
When I do the math, I find that my Ca levels are indeed very low, only 406 ppa. It's busy math, gotta go from the soil tests, to the CEC value then to the conversion factor, do the math correctly....
I'm glad that I've put lime and gypsum out. I've allowed about 5 weeks inbetween sampling the soil there again. Those tests are not back yet. My hunch is that I'll need to add more, however will wait to add more until I see the numbers.