The 2008 Clemson Study

Trials and evaluations of TifGrand® are ongoing.

One of the most recent university studies, published in 2008, was conducted at Clemson University and in these trials, like many others, TifGrand® outscored the competition, including Celebration common bernudagrass, by a wide margin. The table below, with TifGrand® and Celebration isolated for clarity, shows the actual scores reported by the Clemson study.

The 2008 Clemson Study

TestConditionCultivarScore
Turfgrass Quality (TQ) Ranking WEEK 4Full-SunTifGrand® Certified 1
Celebration common
7.3
7.5
64% Continuous ShadeTifGrand® Certified 1
Celebration common
6.2
6.5
Turfgrass Quality (TQ) Ranking WEEK 8Full-SunTifGrand® Certified 1
Celebration common
7.8
7.3
64% Continuous ShadeTifGrand® Certified 1
Celebration common
4.8
4.5
Total Shoot Chlorophyll WEEK 4Full-SunTifGrand® Certified 1
Celebration common
2.39
1.78
64% Continuous ShadeTifGrand® Certified 1
Celebration common
2.47
2.08
Total Shoot Chlorophyll WEEK 8Full-SunTifGrand® Certified 1
Celebration common
3.19
2.64
64% Continuous ShadeTifGrand® Certified 1
Celebration common
2.77
2.24
Root Biomass 2Full-SunTifGrand® Certified 1
Celebration common
0.127
0.201
64% Continuous ShadeTifGrand® Certified 1
Celebration common
0.049
0.064
Root LengthFull-SunTifGrand® Certified 1
Celebration common
9.23
8.78
64% Continuous ShadeTifGrand® Certified 1
Celebration common
8.72
7.00

From: Baldwin, C. M., H. Liu, and L. B. McCarty. 2008. Diversity of 42 bermudagrass cultivars in a reduced light environment. II International Conference on Turfgrass Science and Management for Sports Fields. Acta Hort. (ISHS) 783:147-158.

Notes:

  1. TifGrand®(PP21017) was initially evaluated as Tift No. 4 and/or ST-5. It is now marketed as TifGrand® (PP21017) and the cultivar name has been changed in this table to reflect that.
  2. Additional considerations* concerning Root Biomass:
    • Common bermudagrass selections like Celebration will have more large rhizomes which have weight but do not contribute to water and nutrient uptake;
    • Fine roots are what do the work, in terms of water and nutrient uptake, and are essential in terms of plant health. Image analysis methods which measure the total length of the fine and the coarse roots might be considered as part of future evaluation protocols.
*These considerations are not part of the study conclusions.

Using the actual data from this study it is clear that:

  • TifGrand®(PP21017) Certified Bermuda scored higher in 8 categories;
  • Celebration common bermudagrass scored higher in only 4 categories;
  • Celebration common bermudagrass scored higher in Shade Tolerance at 4 weeks and lower at 8 weeks - Celebration actually declined when compared over time;
  • TifGrand®(PP21017) Certified Bermuda scored higher for Shade Tolerance than Celebration common bermudagrass after 8 weeks in 64% continuous shade.
A copy of the full report is right here and we invite you to read it in detail and to form your own conclusions based on the actual results reported. You may also download the PDF by clicking "Save As" from your browser window.

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