Following their advice, I started to rotate the crops and apply less fertiliser.
From the guardian.co.uk
The use of manure as a fertiliser could have led to contamination of vegetables.
From the independent.co.uk
Anything they eat will be converted into a high value fertiliser in pellet form.
From the guardian.co.uk
Instead, this gas will be turned into fertiliser, or liquefied and sold as fuel.
From the economist.com
How much better would it be to turn the urine directly into nitrogen fertiliser?
From the guardian.co.uk
Your partner recently bought a load of chemical fertiliser for your rose garden.
From the newscientist.com
Feed with a general fertiliser such as Growmore in early spring as growth starts.
From the telegraph.co.uk
Yields may decline if cereals expend too much energy making their own fertiliser.
From the newscientist.com
Agriculture would be transformed if crops could produce fertiliser as legumes do.
From the newscientist.com
More examples
Fertilizer: any substance such as manure or a mixture of nitrates used to make soil more fertile
Fertilizers are soil amendments applied to promote plant growth; the main nutrients present in fertilizer are nitrogen, phosphorus, and potassium (the 'macronutrients') and other nutrients ('micronutrients') are added in smaller amounts. ...
Alternative spelling of fertilizer
(Fertilisers) Substances put onto soil to improve plant growth.
A material that provides plants with one or more or the main plant nutrients that help them grow.
Fertilisers are given to plants to promote growth. They can be naturally occurring compounds (such as peat) or they can be manufactured - either through natural processes (such as composting) or chemical processes. ...
A substance containing plant nutrients which is added to agricultural land to maintain or increase its fertility. Two kinds:
Chemical soil treatment containing Nitrogen, Phosphate and Potassium: nutrients required for plant growth. Can be made naturally, e.g. by composting or synthetically using natural gas (methane).
Substances added to the soil (in granules or liquid form) containing one or more recognized plant nutrients, such as nitrogen, potassium and phosphorus (called an 'NPK' mixture). ...