I just learned how to put pics on here and want to show yall the yellowing of a few of newest leaves on baby citradia. Most of it is really green, but does some yellowing of parts of a few leaves mean a deficiency?

The yellowish leaves are showing a Manganese deficiency. The deficiency can be caused by an actual deficiency, or by soils with high bicarbonate levels. I would not worry about it to much, unless the symptoms become more general to the tree. A foliar spray with a trace mineral solution, or a manganese sulfate solution should take care of it. Personally I would just keep an eye on the tree's future growth. A manganese deficiency symptom on a leaf here and there is not all that uncommon. All in all the tree looks quite healthy. - Millet

Thanks, Millet! Could you please look at my other post about yellow Nansho; I've added pics. Thanks.