Leaf Analysis Time of Year

If you haven't done it yet, it's that time of year to be doing leaf analysis for citrus and avocados. Analysis prevents deficiency symptoms from appearing and maintains good yields, all else being well done. To get an idea of what extreme situations look like, take a look at look at these symptoms on various webpages. The one from UC IPM, also includes other leaf symptoms besides nutritional ones - disease, pest and abiotic.

UC IPM

https://ipm.ucanr.edu/PMG/C107/m107bpleaftwigdis.html#:~:text=Identification%20tip%3A%20Leaf%20mottling%20and,bacterium%20spread%20by%20aphidlike%20psyllids.

University of Florida

https://edis.ifas.ufl.edu/publication/CH142

Haifa Group

https://www.haifa-group.com/citrus-tree-fertilizer/crop-guide-citrus-plant-nutrition

A brief explanation of leaf analysis: https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=28217

Citrus leaf potassium deficiency. You don't want to see this, and is one reason for leaf analysis.