Crop response to acid soil management: GRDC – NSW (Webpage)
This Grains Research and Development Corporation (GRDC) webpage explains the results of a south-eastern NSW research project using 5 cm interval pH testing to a depth of 20 cm to identify subsurface pH layers. It found that testing soil pH in 5 cm intervals down to 20 cm enables growers to identify acidic subsurface layers accurately. The research was conducted at 4 trial sites: Morven and Methul (with severe soil acidity) and Canowindra and Burrumbuttock (with soils with pH values that do not yet limit production). Findings indicated that if low‑pH zones are found, incorporating lime to the depth of acidity provides the quickest correction. Where deep mixing isn’t possible, applying enough lime to raise surface pH to about 5.8 can gradually neutralise deeper layers. Crop yields respond strongly when lime is effectively applied, especially in severely acidic soils. The economic response to lime depends on the extent of soil acidity, where it is in the soil profile, the effectiveness of the lime application, seasonal conditions and what crops are then grown. This paper is available as a downloadable PDF [296 KB, 6 pages]. It will be relevant to other Australian regions.#
This is a carefully curated database of important soil resources. The data base is not exhaustive but rather a library of the resources we believe are the most useful for the audience. Each resource has been added after careful consideration against our selection criteria, including but not limited to its scientific validity, accessibility, and readability. The library generally does not include most academic research papers but may include some open-source papers written in accessible English.
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SSA reminds users that these resources are a guide only. Our understanding of soil science is improving continuously so it is important to check the suitability of the information for your purpose with an appropriately qualified professional such as a Registered Soil Professional or a Certified Professional Soil ScientistÂ
