Agriculture Commons^™

Subsurface Acidity, Mike Bolland, Chris Gazey, Amanda Miller, Dave Gartner, Julie-Anne Roche

Bulletins 4000 -

Productive agriculture increases the concentration of hydrogen ions in soil, which acidifies the soil.

Aluminium is a component of many soil constituents, including clays and oxides, and is also present on the surfaces of soil organic matter. As the concentration of hydrogen ions in soil increases, soil pH decreases, and aluminium starts to dissolve from the soil constituents, increasing the concentration of aluminium ions in soil solution.

As the concentration of aluminium ions in the solution increases, the aluminium in the soil solution becomes increasingly toxic to plant roots, reducing root growth. The smaller amounts of plant roots explore a …

Table Grapes From Western Australia At A Glance, Ian Cameron, Geraldine Pasqual

Bulletins 4000 -

The high quality of Western Australian table grapes commands premium prices on both domestic and international markets. The industry has grown rapidly from 1992 to 2004, with production increasing from 2200t to 6500t and exports increasing rapidly from about 100t in 1992 to 1320t in 2003. Western Australia produces about 5 per cent of Australian table grapes.

About 300 commercial table grape vineyards are located near the Western Australia coast, extending from the Gascoyne region in the north of the State, including Carnarvon, to the South-West region, including Harvey, Donnybrook, Margaret River and Busselton areas.