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Old 09-05-2011, 06:37 PM
greendoctor greendoctor is online now
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Join Date: Mar 2008
Location: Honolulu, Hawaii
Posts: 7,438
That is why I think there is a place for chelated micronutrient blends in lawn care. Especially when the soil test looks like your typical clay soil result.

I can divide my test results into 3 typical scenarios:

Clay soil inland, far from the beach

pH less than 6
calcium
magnesium
potassium
iron
manganese
copper
zinc
sulfur
boron

Nitrogen is not lacking due to misuse of high N fertilizers in an attempt to make things grow.
Phosphorus is seldom lacking due to misuse of 16-15-15, 10-30-10 or 10-20-20

Clay soil with contamination by coral construction materials

pH over 7
potassium
magnesium
iron
manganese
copper
zinc
sulfur
boron
molybdenum
excessive calcium, chlorides, and sodium
excessive phosphorus, again misuse of high P fertilizers because soil is poor.

Sandy soil with contamination by clay imported from the inland.

pH over 7
potassium
nitrogen
iron
manganese
copper
zinc
sulfur
boron
molybdenum
excessive calcium, chlorides, and sodium aggravated by clay not allowing the salts to be leached.
excessive phosphorus, again misuse of high P fertilizers because soil is poor.

Each of these conditions requires a different program in order to have healthy turf and ornamentals.
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