Yellowing of Citrus leaves (forum)

Alex24 starts with ...
Hi all, can some one tell me what is wrong with my mandarin trees. I have planted these in pot plant in a sunny spot (facing north). the soil seems to be draining freely and there is no water build up. I have used a good potting mix, applied cow manure and chicken pallet fertilizer.

This is been going on for 4-5 month now. Initially i though it was Zinc and Manganese deficiency so i bought and applied Zinc and Manganese Chelate. no change yet .
I even though it could be alkaline soil, but again i've used a good quality potting mix.

I went back to bunnings and bough richgro garden Lime,yates copper chelate and yates trace elements. I dont want to apply these yet, but i like to get your opinion/ diagnosis of that is causing the yellowing in the mandarin trees.

refer attached photo of the leaves.
Pictures - Click to enlarge

Picture: 1

Time: 1st April 2015 10:28pm

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About the Author Aex
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Alex24 says...
iam starting to thinking it is Potassium deficiency...

http://www.yara.com.au/crop-nutrition/crops/citrus/crop-nutrition/carences/carence-en-potassium/01-6000-potassium-deficiency-on-orange---citrus/

Time: 1st April 2015 11:06pm

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Original Post was last edited: 1st April 2015 11:06pm
About the Author Aex
Brisbane
#UserID: 10312
Posts: 13
View All Aex's Edible Fruit Trees