Guides
Plant nutrition guides
5 signed technical guides on deficiencies, fertilisation and how to read a product’s technical data sheet. Every figure they cite is the one published on the product data sheet, and each guide says who signs it and when.
01 · Guides
The 5 guides
Boron deficiency: symptoms by crop, when to apply a boron corrector for organic farming and why the margin is narrow
Boron deficiency symptoms in olive, fruit trees and vegetable crops, when to apply a corrector for organic farming and why the margin is narrow · FenOrganic
Fertilisers authorised in organic farming: how to check whether an input is suitable, in five steps
How to check whether a fertiliser can be used in organic farming: Regulations (EU) 2018/848 and 2021/1165, input attestation and label · FenOrganic
- Olive
- Boron
- Iron
Foliar fertiliser or fertigation: when the leaf absorbs and when irrigation is the better choice
When the leaf absorbs and when it does not, what foliar feeding corrects and when fertigation is better, with the foliar doses from our data sheets · FenOrganic
How to read a fertiliser technical data sheet, line by line
Guaranteed analysis, % w/w and w/v, nutrient form, density, pH and dosage by route, explained line by line on our own data sheets · FenOrganic
- Calcium
- Iron
- Potassium
- Boron
- Nitrogen
- Phosphorus
- Humic and fulvic acids
Iron chlorosis in organic farming: why young leaves turn yellow and what an iron corrector does
Yellow young leaves with green veins: why it happens in calcareous soil, which crops suffer it and what an iron corrector does in organic farming · FenOrganic
How they are written
What a guide can say and what it cannot
- Who signs
- Each guide says who signs it – the FenOrganic technical team, or a person with their position and credentials – the date it was published and, if it has been reviewed, the date of the review and who reviewed it.
- Which figures are cited
- Only those published on the technical data sheet of each product: a dose or a nutrient content that appears in a guide is, literally, the one on the data sheet, and the data sheet is linked.
- What is not published
- Yield or efficacy figures, comparisons with other products and any use other than plant nutrition. What is not on a technical data sheet is not in a guide.