Wednesday, March 7, 2012

SabrEx


Back in the 90's, I got very interested in biological products when Dr. David Kukendall at the USDA Lab in Maryland discovered competitive rhizobia baceterial strains while researching sugar beets. I helped to facilitate the commercialization of the strain and soybean inoculation has never been the same since.

While doing that, we found that Dr. Gary Harmon at Cornell was trying to hybridize beneficial soil fungi called trichaderma and on the 22nd try, it worked. T-22 was created and I got even more plant benefits from it than I did with USDA bradyrhizobia inoculant in soybeans!

A company called Advanced Biological Managment was formed to market these new discoveries. I have become one of the main farmer type on the ground people to explain how these work to farmers. My phone and email is very busy this time of the year. How to use these discoveries hit Crop Talk quite often and here is a reply of one dealer-farmer I got started in the 90's on how SabrEx works.

"In my observations, Sabrex performance is affected by several factors: Soil type, hybrid root strength, hybrid relative maturity, fertilizer management, water availability, and disease pressure.

Soil type: the lighter the soil, the more likely you are to see a yield increase. I have seen yield increases in black soils, but the bump is due to one or more of the other factors.

Hybrid root strength: hybrids with weaker root systems respond to Sabrex. Sabrex increases root mass and stalk diameter and enables these hybrids to uptake more nutrients, especially when disease pressure is higher.

Hybrid maturity: shorter season hybrids show more responce to Sabrex because their "window of opportunity" for peak yield is smaller. Again, I have seen it work well in long season hybrids too, but it is due to one of the other factors.

Fertilizer management: Sabrex helps scavange nutrients and therefore will show more response when nutrients are normally placed farther away (broadcast fertilizer or manure) than compared to banding nutrients close to the row.

Water availablitity: Drought during critical times (pollination or grain fill) can limit yields if the roots cannot access enough water. If water is abundant during these times, then Sabrex won't boost yield unless other factors come into play.

Disease pressure: Corn on corn and heavy manure applications will elevate fungal diseases of both the leaves and roots. Fungicides like Headline can help with the leaves, while Sabrex can help with the roots.

Sabrex is not a cure all. Occasionally, it will actually reduce yield due to the fact that root growth can take away energy from grain fill when all other stresses are low. The graph below shows three years of data on Sabrex and yes it does show an occasional yield reduction. But overall the yield average is very positive. A plot on your own farm will determine if the hybrids and the management that you are using will be a good match for Sabrex."

I used the graph for today's picture. I put SabrEx on every seed or plant I plant or transplant. The science is that good.

You can find out how to order yours by calling ABM in Van Wert, Ohio at 877-617-2461.

Ed Winkle

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