What the textbooks don't tell you about...

John Gadd exclusively writes a column for Pig Progress on the practicalities of pig production and breeding.

John Gadd explains all

What the textbooks don’t tell you about...
The annual appraisal

Column: Avoiding disease in pigs

Despite not being a vet, Pig Progress columnist John Gadd has every reason to dive into the topic of pig...

What the textbooks don’t tell you about...
The annual appraisal

Column: The performance bonus

John Gadd: “Many bonus schemes I’ve seen were well-meaning but tended to be either too optimistic or disruptive.”

What the textbooks don’t tell you about...
The annual appraisal

Column: The annual appraisal

John Gadd: “Don’t do the annual appraisal behind a desk. Choose a couple of comfortable chairs.”

Natural ventilation

Natural ventilation

There are still a few producers who ventilate their piggeries without the assistance of power. These notes may...

John Gadd

Modern ventilation – an overview

I conclude this series on the complexities of effective and economic powered ventilation with some comments and...

John Gadd

Airbags in piggery ventilation (I)

An important one – and an underused one. Pig buildings are getting bigger with much more space to ventilate, and...

John Gadd

Condensation

Condensation is the process of passing from a gaseous to a liquid (most common) or solid phase. It causes...

John Gadd

Air movement

Many of my call-outs involve ventilation problems. Quite a few farmers, particularly those with piggery...

John Gadd

68 ventilation basics

Working farmers do not realise the considerable amount of information a professional ventilationist must enter...

John Gadd

Forced ventilation by fans (III)

Critical temperatures are defined as those between which the pig is most comfortable and thus should perform to...

John Gadd

Forced ventilation by fans (II)

A re-cap Quite true – the textbooks do tell you all about ventilation, but at considerable length and...