Agriculture Reference
In-Depth Information
Summary
• A good quality rock dust is one of the best fertilizers because it contains a broad
range of minerals that will slowly become available over a number of years.
• It's generally more important to increase calcium than magnesium, but the latter
can be supplied by dolomite lime, langbeinite and epsom salts in order to get at
least a 7:1 calcium to magnesium ratio.
• If we're composting, we should have enough potassium, which can also be sup-
plied by greensand and potassium sulfate to aim for a 2:1 phosphate to potash ra-
tio.
• The potash to sulfate ratio should be 1:1 and sulfur can be supplied with gypsum,
langbeinite, potassium sulfate and epsom salts.
• Nitrogen is easily supplied with compost, legume cover crops and fish fertilizer.
