This is quite accurate to get an idea about certain defficiencyes.Colors will vary from one plant to another but the drawing is quite accurate.
I have almonds with calcium deficiency that have curled leaves.Altough they are planted in soil with 8,5 ph,its sodic soil poore in calcium and adding a little gypsum is actually lowering the ph by one/ one and a half unit instantly.
And i have chlorotic looking Gevuina trees but its not just the iron thats not absorbed,there is also a magnesium defficiency ,nitrogen ( im affraid to fertilise them because they can die from fertiliser) and off course iron.All this because of high ph,but ive added sulphur( micronised - its used as foliar spray against insects) that has a little nitrogen and also a little magnesium in it.
Here its hard to find sulphur merchandised as ph lower but its verry common and in perfect ratio made and sold as a pest repellent.Its also dirt cheap unlike sulphur coated urea sold as expensive brands of fertiliser .
Its an easy and reliable way to lower the ph but not manny people use sulphur altough low ph loving plants like blueberryes are common and sold in every supermarket.
Topic: Leaves defficiency guide (Read 537 times)