V
voidpainter
Hi, I'm looking for a simple explanation as to how Calcium and Phosphorus interact in these particular examples of a soil mix and plant symptoms.
THE MIX: loaded with soft rock phosphate, calcium carbonate and high P bat guano. After "cooking" it was sitting at 6.8pH.
Plant A: visible phosphorus deficiency on middle leaves + purple petioles + purple stems.
I read somewhere that high Ca and high P in alkaline soils tend to react and lock each other out. I'm looking for more info regarding what actually happens here and how would one solubilize them again into readily available forms.
Plant B: visible zinc deficiency, limeish colored top leaves, shorter plants than the control group, less yield, smaller flowers.
This suggests the P levels in that particular pot were high which in turn lead to a Zn lockout. Or Zn was locked out due to high pH.
both pots of the Plant A and Plant B measured 6.9 - 7.1 pH at harvest.
............
Given that the two pots in question started in the same soil mix,example A lead to a reaction between Ca and P which made P unavailable & example B lead to Zn lockout due to high P and/or higher soil pH
Is it then possible that the same cause (eg. high P or high pH) leads to different scenarios, different issues?
Both plants were "identical" clones and both plants were grown in same soil mix.
THE MIX: loaded with soft rock phosphate, calcium carbonate and high P bat guano. After "cooking" it was sitting at 6.8pH.
Plant A: visible phosphorus deficiency on middle leaves + purple petioles + purple stems.
I read somewhere that high Ca and high P in alkaline soils tend to react and lock each other out. I'm looking for more info regarding what actually happens here and how would one solubilize them again into readily available forms.
Plant B: visible zinc deficiency, limeish colored top leaves, shorter plants than the control group, less yield, smaller flowers.
This suggests the P levels in that particular pot were high which in turn lead to a Zn lockout. Or Zn was locked out due to high pH.
both pots of the Plant A and Plant B measured 6.9 - 7.1 pH at harvest.
............
Given that the two pots in question started in the same soil mix,example A lead to a reaction between Ca and P which made P unavailable & example B lead to Zn lockout due to high P and/or higher soil pH
Is it then possible that the same cause (eg. high P or high pH) leads to different scenarios, different issues?
Both plants were "identical" clones and both plants were grown in same soil mix.