August Guelph Service Bulletin
SOIL SAMPLING AFTER WHEAT HARVEST
Harvested wheat fields often offer perfect conditions for soil sampling, especially this year with moist soils. Many growers choose a routine of soil testing after wheat harvest removal so that their 3 year sampling rotation remains intact.
SGS offers customizable soil sample extraction services, in a variety of methods, to best suit the needs of each operation. From conventional bulk composite sampling to intensive grid sampling, our professional technicians are equipped to efficiently sample as requested.
Where manure is part of the nutrient plan, testing the soil and the manure allows the optimal rates to be calculated, and can target areas of fields most in need of additional nutrient and organic matter. Contact our lab for more information.
PREDICTING CORN SILAGE HARVEST
Corn is now tasselling, so to predict a potential silage harvest date, you’ll want to make note of when 50% of the field is in tassel and count ahead 65 days. This could likely be the week to start harvesting. In Southwest Ontario, that is often the 3rd week of September. Weather plays a role in the harvest date as rain, or lack thereof, can impact maturity. The single most important factor however, is whole plant moisture at harvest. The ideal moisture content depends on the storage structure.
Here are some guidelines:
- Piles, bags, and bunkers 68 – 70%
- Tower silos 64 -67%, decrease by 2% for each 10 feet above 60 foot silo height, oxygen limiting storage 58 to 62%
VOMITOXIN (DON) TESTING
Where Fusarium head blight is present in wheat, there is potential for vomitoxin (DON) to develop. Fusarium does not always lead to the occurrence of vomitoxin (DON), however lab testing can confirm and measure the accumulation of this mycotoxin.
Beyond the usual N-P2O5-K20 testing of fertilizer, SGS can also measure all mineral constituents and heavy metals in your fertilizer product. Contact our lab with any analytical questions you may have.