Ken Yeomans Planning for Sustainable Agriculture Keyline is a set of principles, techniques and systems, which form the logical basis for a practical plan for the sustainable development of rural and urban landscapes. The first book on Keyline book was published in 1954. In it, P.A. Yeomans exploded the myth that it takes 1, 000 years to produce an inch of topsoil. Yeomans pioneered, among other ...

Soilmaster provides definitive advice and analysis for farmers and environment ...

Sydney Environmental & Soil Laboratory offers physical and chemical tests for all growing situations, rapid turnaround, artificial media, irrigation waters and nutrient solutions, ISO9002 compliance for all laboratory practices, interpretation and recommendations from qualified consultants, set test packages or customised testing ...