High land prices reflect these expectations and make it unprofitable to grow strawberries using less intensive methods.

Organic farming can be less effective at protecting wildlife than intensive methods, according to research that undermines its claim to be the most environmentally friendly form of agriculture.

The increased efficiency provided by the proportionator makes more work intensive methods such as the optical fractionator less attractive except in small projects.

Intensive methods include predator control for cats, ferrets, stoats and weasels.