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Tag archive: lime

Four ways acid soils affect crop nutrition

Most growers know that major plant nutrients become less available as soil pH decreases. But there are four ways acid soils can affect crop nutrition. Soils are considered strongly acid when the pH is below 5.5. Serious problems are likely when the pH falls below 4.5. 1. Plant roots and […]

Are acid layers in the topsoil hurting yield?

Acid layers within the topsoil can cause crop failure in acid-sensitive plants like faba beans and chickpeas. Conventional agriculture acidifies soil through ammonium fertilisers, nitrate leaching, and product removal e.g. harvesting grain.  Topsoil acidity is usually measured as a 0-10 cm core. This provides an average pH for the topsoil […]

Correcting acidity with lime can induce Mn deficiency in lupins

Lupin growers are being encouraged to assess their crops for manganese (Mn) deficiency. This has re-emerged as a problem in recent seasons, causing split seed disorder. The GRDC’s Western Lupin GrowNotes says this can result in yield penalties of up to 70%. According to Jeremy Lemon from WA’s Department of […]

How soil inversion can turn the tables on soil constraints

Soil constraints stop crops from growing as well as they might. Yields are often lower than expected from paddocks with soil constraints. In Western Australia, some soils are both non-wetting and have subsoil acidity. Soil mixing or inversion can tackle these constraints at the same time. Soil mixing and inversion […]

Do you need lime and potassium? Apply both

trail potassium plots with youtube play button

Large areas of West Australian cropping soils have low potassium (K) reserves. Acidity also constrains most of these soils.  Potassium deficiencies have become more widespread with intensive cropping, removal of hay or stubbles, and K fertiliser inputs lower than removal rates. James Easton is the Field Research Manager with CSBP […]

Can I burn lime and gypsum with stubble?

What happens to gypsum or limestone when stubbles are burnt? Gypsum and limestone are soil amendments – sometimes spread onto paddocks before burning of crop stubble. Stubble or grass fires can affect limestone and gypsum in two ways: chemical changes due to high temperatures, and convective losses as ash rises. […]

Cultivation boosts fert. response

New research from DAFWA presented at the 2014 GIWA Agribusiness crop updates suggests you may get more bang for your crop nutrition buck if you spend some of the bucks on cultivation and lime. Profit is driven by the cultivation effect on nutrient availability. Deep cultivation gave a yield response […]