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Catalogue: GRDC Media
If growers reduce P rates at seeding then, unless it replaces what is removed, soil test values will decline, according to IPNI's Dr Rob Norton... Dr Norton says growers spend from $50 to $100 per hectare on P every year, which is a big investment when they do not know what the result is going to be at the end of the season... "Shallow samples over-estimate soil test values and deeper samples underestimate the true value representative 10cm deep samples are critical to interpret the current soil P tests...
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Catalogue: GRDC Media
If growers reduce P rates at seeding then, unless it replaces what is removed, soil test values will decline, according to IPNI's Dr Rob Norton... Dr Norton says growers spend from $50 to $100 per hectare on P every year, which is a big investment when they do not know what the result is going to be at the end of the season... "Shallow samples over-estimate soil test values and deeper samples underestimate the true value representative 10cm deep samples are critical to interpret the current soil P tests...
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