“My name is Wayne Hofmann, I graduated with First Class Honours in Agriculture from Massey University in 2009. My thesis involved investigating the effect of gibberellic acid and nitrogen on pasture drymatter yield using the commercially available product ProGibbŽ SG
(a.i. 40% gibberellic acid).”
This research concluded that gibberellic acid is another useful tool available to farmers to help them achieve the balance between feed supply and demand. My parents farm at Waihi and have been using Gibb-Gro (a.i. 90% Gibberellic acid) since last spring after previously using ProGibbŽ SG.
I am seeing no major variation in the drymatter responses achieved with Gibb-Gro compared to those achieved with ProGibbŽ SG. The one difference that is noticeable between these two commercially available gibberellic acid based products is the cost per hectare with Gibb-Gro being noticeably cheaper.
We continue to use Gibb-Gro.
“Murray Steele Trial, Gibb-Gro v ProGibb, 2009”
Murray and Paula Steele are very well known and prominent farmers from Rotorangi near Cambridge. Murray was using ProGibb. He had heard about Gibb-Gro and decided to compare. Trial started early July, a paddock was pegged into two strips and both products were applied same day.
Plate metering was done on the 28th July, ProGibb was ahead of Gibb-Gro by 56kgs DM, on the 12th August plate metering saw ProGibb still ahead by the same amount as before,( 56kgs DM.) However on the 20th August there was a turn around and Gibb-Gro was now ahead by 84kgs DM and on the final reading on the 27th August “Gibb-Gro was 170kgs DM ahead of ProGibb.”
“We are very happy with Gibb-Gro. Recommend this product”
Aad and Wilma Van Leeuwen, Van Leeuwen Dairy Group, 12000 cows, Waimate.
“Even on my steep country I could see a good response which I did not really expect. The flats were amazing”.
Murray and Sue Edens, sheep and beef, 400 hectares, Opito Bay.
Ricky and Jenny Duggan milk 220 predominantly jersey cows near Ngatea on the Hauraki Plains. They achieve just under the 400kg milk solids per cow. Ricky says while they are known to have a good herd the secret is of course in the feeding. They have an all grass system and rely heavily on Gibb-Gro to keep them out of trouble he says. He sprays on the Gibb-Gro in the Autumn, with his weed spraying in June, and follows behind the cows in the Spring.