Well i did a test of the soil in the greenhouse, i took samples from 2 spots in there, at both ends length-wise. I took 3 samples per spot, one from the top soil, one 15-20 cm down and one at 30 cm down.
I used a non fancy ph meter and ph test trips, all of the readings were pretty close to each other , from around 5 to around 6. Due to the remote difference between the colors of the ph strips i couldnt differenciate the results between 5 and 6 ph. I had some readings on the ph meter that were 5.50 so i just take it as just between 5 and 6 for the strips.
I will share the results only on the ph meter, as it clearly showed some ph change as i was testing the samples. The strips being hard to read due to the closeness of the readings did have a colour closer to the 5 ph.
Results with ph meter -
- The top soil on both samples was like 5-10 points below 5, but i take it as a 5 anyway.
- the 15 cm probes showed a ph of 5.60 / 5 and a half...
- the 30 cm ones showed a result of 5.80.
I' m sure that deaper where my soil was not ammended prior to planting, the ph is probably more like a 7, deaper the soil is clay like.
So if i can count not on a 100% on those radings, they clearly show that the soil gets more alkaline with depth, whereas at the top due to the mulch it is more acidic.
So i would say i have an average ph of arround 6...i wont add the calcium carbonate for now, i will look into other alternatives ....