Paddy Shannon's full pot trial report!

Below is the full report produced by Paddy Shannon after completing the pot trials in November 2009

Damon Forsyth
General Manager
TerraCare Fertilisers Ltd

Pasture growth results for the demonstration trays in the glasshouse.

This year's demonstration included DP 65 as well as Replenish.

On the Volcanic soil, DP 65 has performed nearly as well as Replenish; however, on the sedimentary soils from Southern Hawke's Bay, pasture growth on Replenish has out-yielded all other fertilisers. Both Replenish and DP 65 appear to give more pasture growth than superphosphate.

Of note is the trend in cut 3. The growth on the Replenish trays on the volcanic and Pallic soils wilted while that on the DP65 and superphosphate trays did not. The Replenish tray on the slip-face soil was unaffected. As a result, DP 65 appeared to out-yield Replenish on the Pallic and Allophanic soils on this occasion.

With cut 4, the watering regime was increased and the wilting problem did not recur in the most rapidly-growing trays (Replenish and DP 65) so the Replenish trays gave the highest yield on all soil types.

The results are below.

P W (Paddy) Shannon
Scientist
 

 
TerraCare Dicalcic 6 month Pot Trial Results

Gross Margins after Phosphate Fertiliser Costs. ( $/ Ha ) Applied ( Jan 2010 Prices)

Average results from 6 month pasture trial grown in Volcanic Ash, Southern Hawkes Bay Clay and hill country Slip soil types (Sheep and Beef estimates only). The gross margins and residual value of all fertiliser applied has been calculated over a 12 month growing season.