I find the reporting of the yields very amateur and incomplete. I cannot comment on the experimental design & seasonal environmental conditions, as it was not even reported, again very amateur.
The soil was described as a “latosoil”, this does not even exist in the soil science terminology. The previous experiments were described to be conducted on “flat soil” – again, this terminology is totally meaningless. There are no indications of the composition of the basal fertilizers and their application rates.
There is no indication of replication and hence there are no statistics calculated to correctly identify any significant yield increases.
Below is a graph to show how to correctly interpret this “experiment”.
At best, the yield increase is only 6.6%, which is most likely within the variation you would expect from yearly differences in environmental conditions.
"The wheat results using Pampafos® 200 kg/ha of P2O5 were 18% higher than
conventional SSP fertiliser applied under the same testing conditions. " This is a very misleading statement as the the rate of the comparison "conventional SSP fertiliser applied" is not given !!!!!!
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