South Africa Potato Trial Increases Yield 79% and Brix Levels by 57%

In South Africa, and some nearby African countries, SumaGrow is marketed under the ExploGrow name.  Here is a video of a potato trial, which increased the yield by 79% and the brix (natural sugars and nutrients) levels by 57%!

Mississippi State University Study Validates SumaGrow Benefits, 16% Yield Increase in Irish Potatoes

Irish potatoes are of great economic and dietary value as a food-source worldwide ranking as the third most important food crop after rice and wheat.  Potatoes require high levels of fertilizer to produce high yields with marketable quality. However, in some countries fertilizer is very difficult to obtain and very expensive. Using SumaGrow would greatly reduce this need for, and cost of, fertilizers.  With SumaGrow, it has been shown that equivalent yields and growth can be obtained at reduced fertilizer rates when compared to full recommended fertilizer treatments.

In almost all trials, SumaGrow actually increases the yield compared to the existing grower standard — what the farmer is obtaining now using the best available technologies without SumaGrow.  In this particular trial, growing Red LaSoda Irish potatoes, “combined yields from the grading process at ten days following harvest showed the same results where the SumaGrow treatments were as much as 2,509 Lbs/acre greater than the 100% fertilizer treatment without SumaGrow.”  This equates to a 16% yield increase.

Additionally, “at harvest criteria did show the strengths of the SumaGrow product in reducing fertilizer rates, hence reducing input costs and minimizing environmental hardships.”  Better plant health and vigor, as well as higher brix levels were also noted.

Here is the link to a copy of the study report: Mississippi State U — Irish Potato

Trial of Five Potato Varieties in Italy Agriculture Institute, Prever – Osasco



Solum Naturale Sumagrow inside test was conducted on potato plots planted at Cascina Buffetta, situated at 1050 m. above sea level, in the town of Angrogna, 45 km southwest of Turin.  Potatoes were planted on 6 ridges in simple row, each with length of 15 – 20 meters, leaving in each a plot a section (10%) as control on which no Solum Naturale SumaGrow inside, was applied.

All other crop operations were ordinary (no base fertilization was applied, as dealing with fertile soils, recently activated after a long cultivation rest; in absence of Colorado potato beetle no insecticides was required; Two preventive applications with Bordeaux mixture were applied against downy mildew).

Results were observed on 4 different potato cultivars, three white pastes (Agria, Monalisa and Mozart, the latter red-skinned) and one, the Bergerach, with purple flesh and skin (less productive and with smaller tubers).

No culture differences were observed during the vegetative phase, plants appeared healthy and in good condition in the test areas as well as control, with no detectable differences.  The results are reported by yields in kg. per plot linear meter.

PLOT Yield in Kg/linear meter
Test Control Variation
Plot 1 ‘ Agria 5,2 4,4 18%
Plot 2 ‘ Bergerach 2,2 1,8 22%
Plot 3 ‘ Mozart 3,2 3,0 7%
Plot 4 ‘ Mona Lisa 3,7 3,7 0%
Plot 5 ‘ Bergerach 2,4 2,0 20%


In four out of five plots, we observed good effectiveness of Solum Naturale SumaGrow inside, and only in one plot it was irrelevant.  Yield increase, per linear meter, was about 20% in three out of five plots.  The overall yield increase result was 13.4%.

The limiting plot extension does not allow us to state with certainty whether the product would be useful in all culture applications, however, the results are uniquely pointing to the direction of definite production-induced increase by the use of this product.

Angrogna, October 2013

Marco Ramotti (Teacher of di Agriculture Ecology – Agriculture Institute, Prever–Osasco)

Joussef El Kaoukabi (Internship third year student at Agriculture Institute, Prever–Osasco)

Downloadable one page report:  Italy Potato Report