Best practice for phosphorus fertilisation on farm von Richards, Ian R.

Agronomic knowledge transfer from research to the field 24 th Francis New Memorial Lectture von Richards, Ian R.

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Micronutrients in arable and field vegetable crop production von Richards, Ian R.

The fertiliser directory all you need to know on fertiliser materials in a simple and easy to use guide ; materials guide ; key nutrients, common terms, main fertilisers, physical... von Richards, Ian R.

The horticulture directory all you need to know on fertiliser materials in a simple and easy to use guide ; fertiliser guide ; key nutrients, common terms, main fertilisers, substr... von Richards, Ian R., Rainbow, Arnie

Costs and effects of uneven spreading of nitrogen fertilisers von Miller, Paul C. H., Audsley, Eric, Richards, Ian R.