Publications

Lime -reverted superphosphate.

The P fixation bogey (Part 1).
Reactive phosphate rocks.
Prescription Fertilisers (NZ) Ltd.
Cost of nutrients.

Sodium: not a cure all….
Lime and liming materials

The P fixation bogey (Part 2).
Prescription Fertilisers (NZ) Ltd .
Maxicrop is back….
The cost of P in super.

The P fixation bogey (Part 3)
Magnesium fertilisers for pastures.

Solid versus liquid fertilisers.
Price watch: Phosphate fertilisers.
Super versus RPR?
Lime Reverted super.

Nitrosol: Liquid blood and bone.
Soil Testing: Base saturation ratios.

Price watch: Nitrogen fertilisers.
Organic v chemical fertilisers.
Summit-Quinphos: Misuse of science?

Nitrogen fertilisers: a need for caution?
Soil acidification due to fertilisers.
Plant nutrient ratios: what do they mean?

Mainland Minerals: be aware!
Fluid Fertilisers Ltd
Sodium fertiliser: an update.
Price watch: Magnesium fertilisers.

Lime Hill Country – is it economic?
Flea clover, Flea! A nitrogen dilemma.

Why soils become acid
Script Fertiliser and FERTMARK.
Scientific v observational trials.
Magnesium revisited.

Trace elements.
Fertiliser economic in Hill Country.

Calcium, Lime and soil pH.
Soil physical quality.
Maintaining Fertiliser Quality standards.
Price Watch: Nitrogen fertilisers.

Transport and spreading costs.
Biophos – organic but!

The Resin P test: Science and intrigue.
Soil fertiliser trends: are we sustainable?
Soil inoculants, bio-stimulants and activators.

Efficient fertiliser use.
Nutrient budgeting.
Managing nutrient runoff.

What is the optimal Olsen P?
Liquid fertilisers – again?
Product and services to avoid.
Price watch.
Phosphate rock reserves.

The economics of fertiliser use.

P lockup? P fixation?
Sulphur.
Managing nitrate leaching.
Let the buyer beware.
Total Nutrient Management: a new service.
Price watch.

Pasture sulphur requirements.

Lime-Flo: liquid lime.
Sechura RPR.
Soil Testing: which laboratory?
Total Nutrient Management.

Dicalcic phosphate.
FERTMARK.

Southern Fertilisers Ltd (now called Uptake Ltd).
Interpreting sulphur soil tests.
DAP.
Phosphate poisoning.

Good news for soil life.
Urea: Volatilization losses of N.

A Case of Confusing Advice?
Magic bullets? Nitrification and urease inhibitors.

Acidification due to fertilisers?
Growing for Good.
More Good News: Soil Quality.
A matter of Opinion?

Ureas versus Sustain.
Lime: Is finer better?
When is a Fertiliser not a Fertiliser?
Fertiliser: always a good investment.

Efficient fertiliser use on the dairy farm.

All you need to grow?
Fertiliser: what to do in a downturn.
Potassium: malignant or maligned?

Nitrogen Fertiliser Revisited.
The Cost of P Fertiliser.
Mainland Minerals: a case of let the buyer beware?

New versus old pasture.

Some lessons for the field.
Beware: Another Doomsday Prophet.
More Good News: Food Quality.
Commerce One, Science Zero.
Stop the digger.

Are you paradigms shifting?

Has you pasture got the pox? Nutrient deficiencies.
The Organic Movement – its origins.
Can you have you cake and eat it? Environmental good news.
What were they thinking? – a liquid fertiliser story.
A question for the co-operatives? Di-calcic superphosphate.

Price Watch – P fertilisers.
Farmers, fertilisers and anecdotal evidence.

Why do we need lime?.
Liming Materials
Animal Health

Managing soil organic matter.
Fertiliser prices: living with increasing costs.
Mainland Minerals: Again!
A new soil test for sulphur?

Fertiliser Costs: What do we do?
How to feed Soil Bugs

Under the fence line
Nitrogen Inhibitors: A need for National Trial
Earthworms: The Dangers of Romantic Love

Sustain versus Urea
Fertiliser Co-ops: Who do they serve?
Poos and wees: how much and were does it go?
ProGibb
Nutrient Budgets: interprete with caution
Elemental Sulphur: Our recent experience
Price Watch

Get your Fertiliser Act Together

Less N
SustaiN: In More Trouble?
EcoN
The Commercialization of Science
Post Script

The Organic Movement: New Products Old Stories Same Nonsense
Open Letter to Hill Laboritories
Your Questions Answered
Organic Foods: Are they Better?
The New Zealand Soil Carbon Conference

Bas Saturation Ratios – Why they are Nonsense!
Nutrient Quality or Nutrient Ratios?
Defining Soil PH
Mesuring CEC
The Quantity Theory
Balanced Nutrition
Hill Laboritories Again
Climate Change and ETS
The Price of Independence

Potassium: A forgotten Nutrient?  All Paddock Soil Testing – an analysis of the process and it’s merits.  All about Abron.  Pasture Persistence: a soil fertility problem? Professional incompetence or poor training?

Independent Soil Scientist Dr Doug Edmeades has called for a rethink about the need for a new “Fertiliser Act” to protect farmers from overzealous fertiliser companies.

The ETS comes into effect in July this year. Initially it will only include energy (electricity, petrol and diesel) but by 2015 it will include ruminant animals because they produce methane.

Dr Doug Edmeades, today congratulated the Fertiliser Quality Council on its determination to publish a damming report by Irish scientist, Dr Catherine Watson, which concluded that Summit-Quinphos’s advertising of its product Sustain was misleading.

Who do the Fertiliser Co-operatives serve?

A Press Release from Australasian Science based on a public lecture by Dr Edmeades to the Universtiy of West Australia

This booklet explains all a farmer needs to know about soil testing. It is an invaluable guide for farmers. It includes sections such as: Why soil test? Which soil tests are scientifically sound? And how to avoid wasting money on useless tests. Written in an easy to read and understand format and style.

(NZ $15.00)

Please contact us to order your copy.

Revised Edition

A booklet written by Dr. Edmeades, exposes in plain language 50 common fallacies which are used by some salesmen to sell their products.

NZ $15.00

Please contact us to order your copy.

An article in Australian Science from on a public lecture by Dr Edmeades at the University of West Australia

Science is under threat. Dr Edmeades explores the various reasons for this and what must be done.

Dr Edmeades’s seminal study on the effects of commercialising scence in New Zealand. First published in the New Zealand Science Review