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Testimonials and results

Gergely Sztupa, hungarian dairy cow farmer and grain grower, user of Marcel Mezy technologies.
Gergely Sztupa
The structure of the soil has improved, even working the soil gives you a completely different feeling
Dairy cow farmer
Pusztaszabolcs, HUNGARY


Mr. Gergely is a dairy cow farmer in SZTUPA in Fejér County Megyer (Hungary). His farm : 1150 ha of which  450 ha belong to integrated producers / 600 dairy cows (Holstein)/ fodder and cereal production. User of Bacteriolit and Bacteriosol since 2010.


  • Bactériolit (since 2010) / Optimised use of effluents
  • Bactériosol concentré (since 2010) / Fertilization of soil


Gergely Sztupa, plant production manager, has now become SOBAC’s Ambassador in Hungary. The farm is located in a village 15km away from the Velence Lake (south of Budapest).   

We farm 1150 ha, part of it is integrated. Which means that we are integrating other farmers to our producing system in order to help them buy inputs and sell their production at better prices. Our own farm is on 700 ha. We have 900 livestock and we milk 600 Holsteins.  


We have really good soil of which 80% is clay and 20% is silt. 

We have started to use SOBAC’s technologies in 2010 thanks to one of our integrated society who put us in contact with Sersia Farm Kft, who is representing their products here in Hungary.  The reason why we have started to use the concept was because of the management of our manure. Currently, we are using SOBAC’s technology on 700 ha. We produce close to 8000 T of manure every year.


The farm had a lot of manure, which to be honest, was a problem for us. We would maybe cover 150 to 200 ha every year with it. The quality was not good. The manure had too much straw, sometimes it was not well decomposed but we would we spread it as it was.


SOBAC’s technology, Bactériolit, enables us to have better manure that we can make the most out of using it for our soils


Also, they have advised us to use less manure per hectare in our fields. We were using 30-40T of manure per hectare and now we are only using 20T. And it is working, sometimes even 10T/ha is enough for us. 

Manure with Bacteriolit has nothing to do with traditional manure, it is more like humus. 
It’s not totally odorless, it smells like soil. It’s a big advantage, people who are living next to the field are not complaining because of the smells when we are spreading the manure anymore. That’s why we can apply manure without any problem.


Use of Bactériolit has also helped us a lot in the work organization. We used to have to turn the manure over, which means that part of our machinery was grounded for that task. But now, if the weather or the work organization does not allow us to do it, we can leave it there without touching it.  


Our soils are more balanced. The differences that we could observe in a field are not as visible now.  But, we suffer from erosion and it takes the fertile part of our soil away. Therefore, our land seems to be more balanced with Bacteriosol and Bacteriolit.


The structure of the soil has improved, even working the soil gives you a completely different feeling. It’s like working on a sponge


The structure of our soils have become lighter. For the first time, I didn’t want to admit it to myself, but many of my employees convinced me of it, the work had become easier. When they use machines and walk on the soil, it seems to be softer like walking on a sponge. To be honest, our sowings are more balanced, more homogeneous. The fluid retention of the soil is better as well as the water management. 


Unfortunately, nowadays, we have localized heaving showers, it never rains evenly for a day. On the treated areas the water quickly penetrates in the soil, but on the untreated ones, it is like on the wheels tracks, you can still see the water the following day. 

With this concept, we were told that if we were using Bacteriolit or Bacteriosol, we had to stop conventional fertilization, and that is what we did. We have stopped phosphor, potash and lime where we are using manure with Bactériolit. We have some areas where we are already using Bactériolit for four years without any negative impact on the yields. 


We have seen that we have a pretty good quality of manure when treated with Bactériolit.


Our costs have reduced as well, as we are buying less conventional fertilizers


We could start to use this technology on more areas. As I have already mentioned, we have a yearly production of 8000T of manure which is not enough to cover our land. That is why we have started to use Bactériosol as well.

So, if we can make the most of our manure thanks to this concept, why shouldn’t we do it?  We have manure in “our hands” and we have to benefit from it. It is obvious that we won’t let the manure rot on the side of the field, we rather use it to improve the soil.


They use Bacteriolit to quickly transform manure, slurry, digestates and green waste into humus and Bacteriosol to practice a natural fertilization.


  • Optimised use of effluents (Before : 30-40T of manure per hectare / Now : 20T).
  • Manure transformation into humus.
  • Fewer odours.
  • Better work organization.
  • More balanced soil.
  • Improvement of soil structure.
  • Work become easier.
  • Our sowings are more homogeneous.
  • Better retention of the soil => improvement of water management.
  • Cost savings.