SOIL NUTRIENTS:

The Macro Nutrients were looked at: Nitrogen, Phosphorus, Potassium and Sulphur.

  Nitrogen (N) Pounds per acre
  Oct 2009 July 2010 Oct 2010 July 2011
LOWER 12.8 56* 47.5 5*
MID 17.7 21* 43.4 5*
UPPER 22.7 73* 63.9 11*
  Phosphorus (P) Pounds per acre
  Oct 2009 July 2010 Oct 2010 July 2011
LOWER 6.2 19* 17.4 17*
MID 6.6 31* 10.8 9*
UPPER 2.7 48* 20.2 22*
* The results in italics were from the ALS Lab in Saskatoon.

The results in regular script were from the U of S Soil Department labs.
 Nitrogen – There was a build up from October 2009 before bale grazing to October 2010. The brome grass is now using all the nitrogen that the soil releases. This shows in the continued yield increase and protein levels. How many years will this continue?

Phosphorus – Based on fall soil test levels there seems to be a build up. July levels may be from soil variance. Phosphorus has about 1/3 the levels of N and K in the manure and feed.

Potassium: - There was not a soil shortage before. All soil levels have maintained a surplus. There are quite large quantities of potassium in bale material and manure. The percentages in the brome plant material increased 82% in 2010 and 71% in 2011. Sulphur: - There was little Sulphur in the bales – no changes from the start of the test.

FEED QUALITY:

Protein levels increased in the brome grass in the bale grazed areas:
8.3% 15.0% in 2010
6.9% 15.5% in 2011
Fibre levels and energy levels stayed the same in both treatments. Nutrients such as Calcium, Phosphorus, Magnesium, and Sodium fluctuated in the feed test – no trends were observed.

In the bale grazing areas the brome grass is more vigorous and contained 20% more moisture than non bale grazed areas – no wonder cows are attracted to it. In 2010 the areas where no bale grazing occurred only 5/11 plant nutrients in the brome were deemed sufficient. After bale grazing all plant nutrients within the plant became sufficient, the brome became more vigorous and was able to take up soil nutrients more efficiently.

Power Poin Presentation prepared by Glenn Barclay PAg:

If you have any questions feel free to contact Glenn by e-mail: eaglecreekwatershed@hotmail.com or by phone: 1 -306-831-6009.

"Bale Grazing Power Poin Presentation"

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YIELD:

Ungrazed Bale grazed

2010:

1,129 lbs/acre (0.6 Tons/ac.)
4,362 lbs/acre (2.2 Tons/ac.)

2011:

(average of three stops): 1,178 lbs/acre (0.6 Tons/acre) 4,603 lbs/acre (2.3 Tons/acre) Range; 1.46, 1.64 & 3.8 Tons/acre

See also:

Final Report on Nutrient and Yield Effect of Bale Grazing on Hay Fields.

"Bale Grazing (ADOPT) - Final Report"

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