Téboulba, Tunisia (May 15, 2017) – The production of potato in Tunisia suffers from major problems in terms of yield, quality and production costs. The aim of this study is to evaluate the effects of ferti-activatosr Sanbio EPSOMIT and Sanbio PLANTA on productivity of potato variety ´Spunta´.

1. Experiment procedure

Table 2. Basic information

Location	Téboulba – Tunisia Figure 1. Map
Responsible organization	Farm Mohsen Jenzri
Experimental products	Sanbio EPSOMIT, Sanbio PLANTA both are manufactured by SANBOS GmbH, Germany
Crop	Potato
Variety	Spunta
Plot	1.5 ha
Soil quality	Bad soil quality with low fertility
Dosage and application	1st application: 0.65 kg PLANTA in 500 L water per ha, soil application 2nd application: 0.65 kg EPSOMIT in 500 L water per ha, foliar spray 3rd application: 0.65 kg EPSOMIT in 500 L water per ha, foliar spray
Irrigation method	Drip irrigation and rainfall

Figure 2. Timeline of season

Figure 3. Yield (t/ha)

4. Conclusion

I have made one application of Sanbio PLANTA fertilizer and two applications of the Sanbio EPSOMIT fertilizer. After few days I noticed a very good development of the plants at the level of the growth, vegetation, vigor and mass of the roots. Thanks to these two fertilizers we increased the production of five tons and improved the quality of the fruits. I recommend these two fertilizers and I will use them in the production of potatoes.” Mohsen Jenzri, 2017