Cucumber leaves yellowing and most cucumbers have been colorless - is this P or K deficiency?

Question

After moving to a new place we started a garden in what has been lawn for a lot of years. Our cucumbers grew vigorously at first and have been producing nicely, but the cucumbers started out only half-green / half-light yellow, now they are all light yellow (we call them albino cucumbers, as if they did not have their usual pigment). All of these cucumbers have fine taste and texture. Now the leaves on the plants are starting to yellow and die off, so it seems we won't have many more albino cucumbers.

We're wondering what the cause of this is. We just got soil test results back for the general area of the yard that we started the garden in. Attached are two graphics from test results: The lab recommended we apply calcitic limestock at 5 lbs per 100 square feet. We try to be frugal and organic so we might just wait for our compost to finish and add that.

Can anyone identify if this is due to K deficiency, or P deficiency, or what specifically?

Here are some photos of the plants in question:

Answer 1

No, it is not P nor K. If it is one of the three main factors N, P and K, then it is N. You can test this by adding any standard organic fertilizer (manure) to the soil.

But it is important to know cucumbers needs more Iron (Fe) than most other vegetables. If you tried calcitic limestock then the necessary Ca for absorbing Fe should be available.

I often use a dedicated cucumber fertilizer for iron supply. You can also use inorganic iron vitroll