Assertion: comfrey's nitrogen | /r/HasProperty | npk
Facets:
Source sentences:
text: As an organic fertiliser Comfrey is a source of Nitrogen, Phosphorus and Potassium (NPK) together with many other trace elements.
text: What is brilliant about comfrey is that it contains high levels of all the essential nutrients for plant growth: Nitrogen, Phosphorus and Potassium (NPK) together with many other trace elements.
text: is that it contains high levels of all the essential nutrients for plant growth: Nitrogen, Phosphorus and Potassium (NPK) together with many other trace elements.