Editing Hydroponics (section)

====Organically sourced macronutrients====
Examples of suitable materials, with their average nutritional contents tabulated in terms of percent dried mass, are listed in the following table.{{sfn|Douglas|1985|p={{pn|date=March 2025}}}}
{| class="wikitable"
|-
! Organic material !! [[Nitrogen fertilizers|N]] !! [[Phosphate fertilizer|P<sub>2</sub>O<sub>5</sub>]] !! [[Fertilizer#Potassium fertilizers|K<sub>2</sub>O]] !! [[Calcium|CaO]] !! [[Magnesium|MgO]] !! [[Sulfur|SO<sub>2</sub>]] !! Comment
|-
| [[Bloodmeal]] || 13.0% || 2.0% || 1.0% || 0.5%|| – || – ||
|-
| [[Bone ash]]es || – || 35.0% || – || 46.0% || 1.0% || 0.5% ||
|-
| [[Bonemeal]] || 4.0% || 22.5% || – || 33.0% || 0.5% || 0.5% ||
|-
| [[Hoof]] / [[Horn (anatomy)|Horn]] meal || 14.0% || 1.0% || – || 2.5% || – || 2.0% ||
|-
| [[Fishmeal]] || 9.5% || 7.0% || – || 0.5% || – || – ||
|-
| [[Wool]] waste || 3.5% || 0.5% || 2.0% || 0.5% || – || – ||
|-
| [[Wood ash]]es || – || 2.0% || 5.0% || 33.0% || 3.5% || 1.0% ||
|-
| [[Cottonseed]] ashes || – || 5.5% || 27.0% || 9.5% || 5.0% || 2.5% ||
|-
| [[Cottonseed meal]]|| 7.0% || 3.0% || 2.0% || 0.5% || 0.5% || – ||
|-
| Dried [[locust]] or [[grasshopper]] || 10.0% || 1.5% || 0.5% || 0.5% || – || – ||
|-
| [[Leather]] waste || 5.5% to 22% || – || – || – || – || – || [[Mill (grinding)|Milled]] to a fine dust.{{sfn|Jones Jr.|2016|p={{pn|date=March 2025}}}}
|-
| [[Seaweed fertiliser|Kelp meal, liquid seaweed]] || 1% || – || 12% || – || – || – || Commercial products available.
|-
| [[Poultry]] manure || 2% to 5% || 2.5% to 3% || 1.3% to 3% || 4.0% || 1.0% || 2.0% || A [[Compost tea|liquid compost]] which is [[sieve]]d to remove solids and checked for [[pathogen]]s.{{sfn|Douglas|1985|p={{pn|date=March 2025}}}}
|-
| [[Sheep]] manure|| 2.0% || 1.5% || 3.0% || 4.0% || 2.0% || 1.5% || Same as poultry manure.
|-
| [[Goat]] manure || 1.5% || 1.5% || 3.0% || 2.0% || – || – || Same as poultry manure.
|-
| [[Horse]] manure || 3% to 6% || 1.5% || 2% to 5% || 1.5% || 1.0% || 0.5% || Same as poultry manure.
|-
| [[Cow]] manure || 2.0% || 1.5% || 2.0% || 4.0% || 1.1% || 0.5% || Same as poultry manure.
|-
| [[Bat]] [[guano]]|| 8.0% || 40% || 29% || Trace || Trace || Trace || High in micronutrients.{{sfn|Jones Jr.|2016|p={{pn|date=March 2025}}}} Commercially available.
|-
| Bird guano|| 13% || 8% || 20% || Trace || Trace || Trace || High in micronutrients. Commercially available.
|}