Join Date: Aug 2012
Location: Vermilion Alberta Canada
Mentioned: 18 Post(s)
Quoted: 2486 Post(s)
A few discussions over the weekend with fellow plant nerds.
Unknown timeline and availability of sulphate over time with 1 long term application. It is unknown if the larger pieces will ever breakdown. Will half the amount be available and leach out or 10%. No one knows as moisture, soil type, tillage practice, seeding disturbance, product variability all influence availability.
The bioanalysis of the compost is unavailable and at the temp of the compost being made crop diseases such as clubroot will survive. The dirt is coming from AB after all. Anyone buying this product should be absolutely demanding a full analysis from an accredited lab.
For the typical canola wheat rotation you still need to add sulphate form and adding 30 lbs to canola provides the 10 pounds for the wheat the following year in the canola plant matter breakdown. Sulfur needs only then to be added once every 2 years. Biosul or any es in that situation has no practical use.
The amount of es added to a blend is miniscule for a long term rotation in a maintenance program egs 10 to 15 pounds of 150 micron or smaller product. The added cost to apply is negligible. Especially considering that when you grow canola, sulphate must be applied anyway. What are you really trying to save?