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Titolo:
Improving water use of annual crops and pastures - limitations and opportunities in Western Australia
Autore:
Tennant, D; Hall, D;
Indirizzi:
Agr Western Australia, Bentley, WA 6983, Australia Agr Western Australia Bentley WA Australia 6983 ntley, WA 6983, Australia Agr Western Australia, Esperance, WA 6450, Australia Agr Western Australia Esperance WA Australia 6450 nce, WA 6450, Australia
Titolo Testata:
AUSTRALIAN JOURNAL OF AGRICULTURAL RESEARCH
fascicolo: 2, volume: 52, anno: 2001,
pagine: 171 - 182
SICI:
0004-9409(2001)52:2<171:IWUOAC>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
MEDITERRANEAN-TYPE ENVIRONMENT; AGRICULTURAL PLANT-COMMUNITIES; USE EFFICIENCY; SOIL-WATER; SOUTHWESTERN AUSTRALIA; DUPLEX SOILS; GRAIN-YIELD; SANDPLAIN SEEPS; NORTHERN SYRIA; DRYLAND WHEAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
89
Recensione:
Indirizzi per estratti:
Indirizzo: Tennant, D Agr Western Australia, Locked Bag No 4,Bentley Delivery Ctr, Bentley, WA 6983, Australia Agr Western Australia Locked Bag No 4,Bentley Delivery Ctr Bentley WA Australia 6983
Citazione:
D. Tennant e D. Hall, "Improving water use of annual crops and pastures - limitations and opportunities in Western Australia", AUST J AGR, 52(2), 2001, pp. 171-182

Abstract

As part of a wider analysis of the potential role for lucerne in farming systems being developed for containing the spread of salinisation, we have reviewed information generated in Western Australia on opportunities for improving the water use of annual crops and pastures. Substantial increases inwater use have been shown to be possible in a number of situations and rainfall environments. Best gains, of the order of 40-70 mm, were reported on deep sand and loamy sand soil types. These were achieved from selection of deep-rooted and longer growing crop and pasture species, and from amelioration of widespread traffic pans and subsoil acidity, and/or selection of tolerant species. On more widespread gradational and duplex soils, soil physical and chemical properties that restrict water infiltration and/or root penetration to depth limit the potential to increase water use. Increases in production and water use are still possible, depending on the permeability of the lower horizons of these soils and on rainfall distribution. At best, recorded increases on these soils were of the order of 5-15 mm in short season, low rainfall environments, and around 40 mm in long season, high rainfall environments. These increases in water use were not invariable. Increases in water use were not noted in dry years on all soils and in all years on shallow duplex soils with impermeable B horizons. Seasonality impacts on all outcomes and is a key issue on all soils and in all rainfall environments.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/11/20 alle ore 20:29:02