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Fertility Trials: Summaries

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The Evaluation of Various Fertilizers for Use on Turf (2011)

J. B. Ross and Mark A. Anderson

This objective of this trial was to assess various fertilizers from Agrium Advanced Technologies for various growth characteristics, specifically colour, quality and clipping yield.

The Evaluation of Various Fertilizers for Use on Turf (2010)

J. B. Ross and Mark A. Anderson

The Bioyield 16-4-5 was the top performing fertilizer in this trial.  It consistently outperformed the other synthetic fertilizers, including the industry standard entry.  As far as the organic fertilizers were concerned the blood meal 12-0-0 rated consistently high for colour, quality and clipping yield when compared to the other organics.

The Evaluation of Various Fertilizers for Use on Turf (2010)

J. B. Ross and Mark A. Anderson

This objective of this trial was to assess various fertilizers from Agrium Advanced Technologies for various growth characteristics, specifically colour, quality and clipping yield.

Assessment of Various Fertilizers on Kentucky Bluegrass Turf (2010)

J.B. Ross and M.A. Anderson

This trial evaluated various new fertilizer formulations that were developed by All Treat Farms.  The Scott’s EcoSense 10-0-5 and the All Treat 24-0-7 fertilizer consistently produced the best turf colour.  The Scott’s EcoSense 10-0-5, the 10-0-6 and the 24-0-7 fertilizers were top rated for quality on all rating dates.  The All Treat 24-0-7 and Scott’s Turf Builder 34-0-7 consistently had the highest clipping yield.  As a percent reduction from the highest total clipping yield (All Treat 24-0-7), Scott’s Turf Builder was 12% lower, 10-0-6 fertilizer was 28% lower, Scott’s EcoSense was 34% lower, All Treat Pelletized Compost was 43% lower, and Time Sav’r Top Dresser and the untreated control were 70% lower.  Those fertilizers that produced the highest clipping yields (All Treat 24-0-7 and Scott’s 34-0-7) also had the greatest thatch layer depth and the highest organic matter content.  There were no differences between treatments when volumetric water content of the soils was compared.

The Evaluation of an Experimental Fertilizer Grass Blast (2008)

J. B. Ross and Mark A. Anderson

An experimental fertilizer, Grass Blast, was compared with an industry standard product, Scott’s Turf Builder.  Two applications were applied on July 4 and August 6, 2008.  The products were evaluated for colour, quality and clipping yield.  Grass Blast performed similarly to the Scott’s Turf Builder in the three measured factors.  As far as consistency was concerned Grass Blast produced a more consistent response than did the Scott’s Turf Builder for both colour and clipping yield.

The Evaluation of Various Controlled Release Fertilizers for Use on Turf (2007)

M.A. Anderson and J.B. Ross
Prairie Turfgrass Research Centre, Olds College

The objective of this trial was to evaluate various fertilizers for their effect on the growth and consistency of growth on Kentucky bluegrass/fescue turf.  Those fertilizers that had the best colour ratings were Grigg Bros Green Spec, CCF coated urea (low rate), PC Twice-a-year old and new formulation (high rate), and the CCF coated urea (high rate).  The CCF coated urea and the Grigg Bros Green Spec was equal to the high rates of PC Twice-a-year, regardless as to whether it was a low or high rate of application.  Those fertilizers that had the best overall quality ratings were PC Twice-a-year old and new formulation (high rate), CCF coated urea (low and high rates), and Grigg Bros Green Spec.  The high rate of the PC Twice-a-year old was better than the low rate, however, for the CCF coated urea, there was no difference.  Those fertilizers that consistently had the highest clipping yields were the high rates of the PC Twice-a-year (old and new formulation) and the CCF coated urea.  Clipping yields were significantly higher on four occasions for the PC Twice-a-year old formulation at the high rate when compared to the low rate.  The standard deviation is a measure of the consistency of nitrogen release, and as would be expected, the clipping yield fluctuated the least for the untreated control.  Of the fertilizers the new formulation of PC Twice-a-year had the most consistent nitrogen release of any of the fertilizers and was considerably better than the old formulation.

Evaluation of Controlled Release Nitrogen Fertilizers on Creeping Bentgrass (2006)

M.A. Anderson and J.B. Ross

The objective of this trial was to evaluate various fertilizers for their effect on a USGA specification sand based creeping bentgrass putting green. Colour ratings provide an evaluation of nitrogen release when compared with an untreated control. In addition, colour ratings provided an evaluation of how consistently the fertilizer releases its nitrogen when compared with the untreated control (Table 2). Those fertilizers that consistently were the best were Grigg Bros Green Spec 7 Iron 7-7-7 granular and Grigg Bros Green Spec 16-4-8. The following fertilizers were equal to the best on nine of eleven rating dates: Nu-Gro 6Iron Liquid 15-0-0, Turf Bred St.Andrews Huma plus 8-3-5, Premium Green Gro Power 10-2-5 and Plant Food 50% SRN Liquid 12-3-12.

Quality ratings were also determined on a weekly basis. The fertilizers that consistently were the best or equal to the best were Grigg Bros Green Spec 7 Iron 7-7-7 granular, Grigg Bros Green Spec 16-4-8 and Nu-Gro 6Iron Liquid 15-0-0. The next most consistent fertilizers were: Turf Bred St.Andrews Huma plus 8-3-5, Premium Green Gro Power 10-2-5 and Grigg Bros Green Spec 10-2-4.

Clipping yields were also collected on a weekly basis. The fertilizer that consistently was the best was Grigg Bros Green Spec 7 Iron 7-7-7 granular. Other fertilizers that were equal to the best on most rating dates were Grigg Bros Green Spec 16-4-8, Nu-Gro 6Iron Liquid 15-0-0 and Turf Bred St. Andrews Huma plus 8-3-5.

The Evaluation of Various Controlled Release Fertilizers for Use on Turf (2006)

M.K. Anderson and J.B. Ross

The objective of this trial was to evaluate various fertilizers for their effect on the growth and consistency of growth on Kentucky bluegrass/fescue turf. Those fertilizers that had the best colour ratings were Grigg Bros Green Spec, CCF coated urea (low rate), PC Twice-a-year old and new formulation (high rate), and the CCF coated urea (high rate). The CCF coated urea and the Grigg Bros Green Spec was equal to the high rates of PC Twice-a-year, regardless as to whether it was a low or high rate of application. Those fertilizers that had the best overall quality ratings were PC Twice-a-year old and new formulation (high rate), CCF coated urea (low and high rates), and Grigg Bros Green Spec. The high rate of the PC Twice-a-year old was better than the low rate, however, for the CCF coated urea, there was no difference. Those fertilizers that consistently had the highest clipping yields were the high rates of the PC Twice-a-year (old and new formulation) and the CCF coated urea. Clipping yields were significantly higher on four occasions for the PC Twice-a-year old formulation at the high rate when compared to the low rate. The standard deviation is a measure of the consistency of nitrogen release, and as would be expected, the clipping yield fluctuated the least for the untreated control. Of the fertilizers the new formulation of PC Twice-a-year had the most consistent nitrogen release of any of the fertilizers and was considerably better than the old formulation.

The Evaluation of Natural Source Fertilizers on Kentucky Bluegrass Turf (2005)

M.A. Anderson and J.B. Ross

Three natural nitrogen source products were evaluated for their overall effectiveness as turf fertilizer for use on Kentucky bluegrass.  Old Mill Alfalfa Green, corn gluten meal and soybean meal were compared with an industry standard product, Milorganite.  The treated plots were rated weekly for overall turfgrass quality and clipping yield.

All three of the natural nitrogen source products tested maintained the overall turf quality of the Kentucky bluegrass. Six ratings out of the ten revealed that the overall turf quality of the fertilized plots was significantly better than the turf quality of the unfertilized control. There was no significant difference in turf quality between the fertilized plots.

Data collected from measuring the clipping weights indicates that although there were differences in the weekly clipping production between the treatments, the only significant difference in clipping weight was between the unfertilized control and the fertilized treatments.

This test would indicate that the three natural products, Olds Mill Alfalfa Green, corn gluten and soybean meal were equal in performance to the industry standard, Milorganite.

Evaluation of Controlled Release Nitrogen Fertilizers on Creeping Bentgrass (2004)

M.A. Anderson and J.B. Ross

The objective of this trial was to evaluate the growth effects of various fertilizers on a creeping bentgrass putting green. Colour ratings, which were determined on a weekly basis, provide an evaluation of nitrogen release and initial green-up when compared with an unfertilized control. In addition, colour ratings provided an evaluation of how consistently the fertilizer released its nitrogen when compared with the untreated control. Those fertilizers that consistently showed superior green-up after each fertilizer application were the Lesco Program followed by Agrico 12-5-20. The same fertilizers had the best or were equal to the best for colour ratings over the period of the trial.

Quality ratings were also determined on a weekly basis. The fertilizers that were consistently the best were the Lesco Program and Agrico 12-5-20. In addition, the Agrico 20-5-10 showed superior quality on 15 out of 17 rating dates, while the Harmony Program was the best or equal to the best on 14 out of 17 rating dates.

The fertilizer that consistently produced the highest clipping yield was Agrico 12-5-20 (Table 4). It produced the highest amounts on 17 of 17 rating dates. This was followed in descending order by the Lesco Program (13 rating dates), Urea (10rating dates), Agrico 20-5-10 (9 rating dates). Higher total clipping yields would indicate a more efficient use of the nitrogen applied.

The Evaluation of Various Controlled Release Fertilizers for Use on Turf (2003)

M.K. Anderson and J.B. Ross

The objective of this trial was to evaluate various fertilizers for their effect on the growth of Kentucky bluegrass/fescue turf. The summer of 2003 was not considered typical for the Canadian Prairie Provinces. May was cold and wet, while June, July, August and September had above normal temperatures and below normal precipitation. Colour ratings were determined in order to evaluate initial green-up following application of the fertilizers. In addition, colour ratings provided an evaluation of how consistently the fertilizer released its nitrogen when compared with the untreated control. Those fertilizers that consistently showed superior green-up after each fertilizer application were AGI #1, AGI #2, AGI #3, AGI #4, AGI #7, AGI #8 and the Poly Plus Fairway Program. Those fertilizers that consistently were the best or equal to the best for colour over all the rating dates were AGI #1, AGI #3, AGI #4, AGI #7 and the Poly Plus Fairway Program. Quality ratings were determined on a weekly basis. The fertilizers that consistently were the best or equal to the best were AGI #3, AGI #4, and AGI #8. In addition, AGI #7 and the Poly Plus Fairway Program were the best or equal to the best on 14 out of 15 rating dates. The fertilizers that consistently were the best or equal to the best for clipping yield were AGI #1, AGI #4 and AGI #8. The fertilizers that produced the greatest amount of clippings over the 15 week period were in descending order, AGI #8, AGI #4, and AGI #1.

Evaluation of Controlled Release Nitrogen Fertilizers on Creeping Bentgrass (2003)

M.A. Anderson and J.B. Ross

The objective of this trial was to evaluate various fertilizers for their effect on a creeping bentgrass putting green. Colour ratings provide an evaluation of nitrogen release and initial green-up when compared with an untreated control. In addition, colour ratings provided an evaluation of how consistently the fertilizer released its nitrogen when compared with the untreated control (Table 2). Those fertilizers that consistently showed superior green-up after each fertilizer application were Par-Ex, AGI #1, and AGI #3. Those fertilizers that consistently had the best colour or were equal to the best were Par-Ex, AGI #1, AGI #3, and the Poly Plus Program.

Quality ratings were also determined on a weekly basis. The fertilizers that consistently were the best or equal to the best were AGI #1 and AGI # 3 (Table 3). In addition, the Par-Ex showed superior quality on 13 out of 17 rating dates, while the Poly Plus Program and AGI #2 were the best or equal to the best on 12 out of 17 rating dates. Of the organic based fertilizers Sanctuary produced superior quality on 11 out of 17 rating dates.

The fertilizer that consistently produced the highest clipping yield was Par-Ex (Table 4). It produced the highest amounts on 14 of 17 rating dates. This was followed in descending order by the Poly Plus Program (8 rating dates), Contec old formula (5), Contec new formula (5), and AGI #3 (5). Higher total clipping yields would indicate a more efficient use of the nitrogen applied. Total clipping yield for various fertilizers in descending order were Par-Ex (222.6 grams), Poly Plus Program (200.5), Contec new formula (193.3), AGI #1 (189.9), AGI #3 (189.1), Contec old formula (173.5), Select (163.2), Sanctuary (151.9) and AGI #2 (146.1).

Evaluation of Controlled Release Nitrogen Fertilizers on Creeping Bentgrass (2002)

M.A. Anderson and J.B. Ross

The objective of this trial was to evaluate various fertilizers for their effect on a USGA specification creeping bentgrass putting green. Colour ratings provide an evaluation of nutrient release when compared with urea and an untreated control. Those fertilizer treatments that had consistently superior colour ratings were urea, Country Club 18-3-18, AGI Turf 1, AGI Turf 2, Raingrow 8-1-4 and the mixture of AGI Turf 1 and 4. N-Sure KS and MESOP 20-0-25 showed superior colour to the untreated control on half of the rating dates. The fertilizers that consistently ranked the highest for quality ratings were urea, AGI Turf1, AGI Turf 1 and 4, and AGI Turf 2. Those fertilizers that had consistently better quality than the untreated control on each of the rating dates were urea, Poultry Product, and Raingrow 8-1-4. The fertilizers that consistently produced clipping yields that were significantly higher than the untreated control were urea, AGI Turf1, AGI Turf 1 and 4, AGI Turf 2 and Raingrow 8-1-4. The treated control, urea, produced 97% more clippings than the untreated control.

The Evaluation of Various Controlled Release Fertilizers for Use on Turf (2000)

D. L. Moroz and J.B. Ross

The objective of this trial was to evaluate various fertilizers for their effect on growth of Kentucky bluegrass. As expected, urea produced the highest colour ratings and clipping yields, and was equal to Lebanon 22-5-12 (six week interval) for quality ratings. Lebanon 22-5-12 (six week interval) produced similar colour ratings to the urea in the first six weeks, but was significantly lower following the second application of fertilizer. Quality ratings showed a similar trend. Clipping yields were highest for urea. Clipping yields dropped off significantly for the Lebanon 22-5-12 from week seven to twelve when only applied once. The Agrium Type I and Type II performed similarly throughout.