Tricks and tips in managing subsoil acidity towards doubling water use efficiency: recent lessons building on decades of research
Publication Date
8-3-2021
Series Number
DAW00252, DAW00243, DAW00244
Publisher
Grains Research and Development Corporation (GRDC)
City
Perth
Abstract
- Surface application of at least 2t/ha lime will increase yield within 1–8 years of application, however, higher lime rates will maintain and improve subsoil pH over time and might increase yield further.
- Economic breakeven can be achieved after five years of cropping where the initial topsoil pH is greater than 5.0. However, if the topsoil pH is 4.6 or lower, economic benefit will occur almost immediately.
- Where the subsoil is acidic and compacted, incorporation of lime using strategic deep tillage is warranted.
- It is recommended to use the most readily available and cheapest test to diagnose subsoil acidity. In most cases this will be soil pH.
Disciplines
Soil Science
Recommended Citation
Azam, G,
Gazey, C,
Reynolds, C,
Davies, S,
Scanlan, C,
Fisher, J,
Damon, P M,
and
Nixon, B.
(2021), Tricks and tips in managing subsoil acidity towards doubling water use efficiency: recent lessons building on decades of research. Grains Research and Development Corporation (GRDC), Perth. Report DAW00252, DAW00243, DAW00244.
https://library.dpird.wa.gov.au/fc_researchrpts/12
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