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Interpretive Summaries:
2011 - Effect of Rate and Timing of K on Three Crops
2010 - The Effect of Potassium Fertilizer Applied to Yellow Sand for the Growth of Wheat, Canola, and Lupin
The Effect of Potassium Fertilizer Applied to Yellow Sand for the Growth of Wheat, Canola, and Lupin, 2010
In a glasshouse experiment, wheat (Triticum aestivum L.), lupin (Lupinus angustifolius L.), and canola (Brassica napus L.) were grown on a yellow sandy earth from the field site where K had never been applied. The Colwell soil extractable K was 26 mg/kg, a soil test level expected to be deficient for the growth and yields of wheat, lupin, and canola. Several levels of K, as sulfate of potash, were applied to give a range of K additions from deficient to an adequate supply of K for dry weight of shoots and grain (or seed yield). The K was applied at four growth stages through the season. The timing of application ranged from 2 to 3 leaves through to boot stage of cereal and bud formation for canola and lupin. ANZ-07
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