uk lemon tree

I found out that my lemon tree has nitrogen deficiency. shall I use a citrus fertiliser that contains 24% of nitrogen or one that contains nitrogen alone?
Thank for your time

 

Here is a quote from Millet:

However, since your tree is deficient, you might want to use a slightly higher N ratio for the first feeding.

-- Skeet

 

thanks

 

The image suggests iron deficiency. How did you determine it was a nitrogen deficiency?

 

Have you checked the pH of your soil? Iron deficiencies are usually related to pH. The close-up picture does show the veins green with yellow in between--which is an indication of iron deficiencies.

 

Giuseppe, I believe GreenGoose is correct in his/her diagnosis that your tree actually has a deficiency of Iron and not nitrogen. However, a tree in as bad of a condition as this tree, could very well be suffering from multiple deficiencies. The symptoms of an iron deficiency are that the NEWER leaves of the tree have green veins on otherwise a yellow leaf. Also the green color in the leaf veins have no green border area around the veins. A less sever nitrogen deficiency shows up on the OLDER leaves, and the newer leaves will still have some green. A sever nitrogen deficiency, displays totally yellow leaves with no variation of color, or displays YELLOW-ORANGE veins with some green out on the far sides of the leaf. Looking at the picture of your tree that you first posted a couple days ago on the thread below, I see yellow leaves with green veins on the newer (upper) leaves, while the older growth at the bottom of the tree is still showing green. I must admit that your tree is showing the most sever deficiency of iron that I have seen in a very long time. You can apply iron sulfate or iron chelate as a soil drench. I would not apply either as a foliar spray, as iron is toxic to citrus leaves and could cause additional problems. Follow label rate recomendations. Good luck to this tree. - Millet

 

Sounds good to me.
If Giuseppe is inexperienced, I would recommend purchase of a prepared fertilizer containing all the trace and minor elements in a standardized ratio for continuous feed after boosting the iron. A soil deficient in one element suggests an inorganic substrate without any fertilizer where other deficiencies may soon turn-up.

 

Thanks for your suggestion I have alreaDY started a continuos feed called drop a drop for 15 days . I will check the ph today and see if it responds to this treatment.

 

skeeterburg suggested it was nitrogen deficiency, I understand that it is difficult to determine through a pic . thanks

 

Sorry Guiseppe-- my eyesight is not what it use to be and I did agree with Nandan since most of the leaves in the first post looked solid yellow. I could see the green veins on your second picture.

One of the reasons I gave you the link on deficiencies was for the complete description of symptoms of N deficiency as well as the descriptions of other deficiencies for comparison. As others have mentioned you probably have multiple deficiencies and pH is probably the basic cause. Even most forms of chelated iron will not be available at high soil pH. Ferrous sulfate will help to lower pH, but you may need to add additional pH lowering compounds such as elemental sulfur and aluminum sulfate. Elemental sulfur will be slow-- months-- so don't add too much expecting instant results.

Skeet

 

thanks I found your info and link very useful. I am very new to the world of citruses and your info is an eye opener.