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In recent years, the importance of biochar application in world´s soils have increased tendency mainly due to its opposite effects. Therefore, the effort of many companies is based on the development of soil amendment which together improved properties and crop productivity in a lot of soils. In this short study, we have verified the effectiveness of biochar blended with farmyard manure named Effeco on soil properties and crop yields in different textural soils (1. sandy soil in Dolná Streda and 2. loamy soil in Veľké Uľany). Our results showed that the Effeco increased soil pH in both soils. In sandy soil, the Effeco more significantly affected sorptive parameters and soil organic carbon content than in loamy soil. Water retention in capillary pores after Effeco application in sandy and loamy soils was higher by 22% and 4%, respectively compared to control. On the other hand, more significant effect of Effeco application on soil structure was observed in loamy soil. The total crop productions in sandy and loamy soils due to the Effeco application were higher by 82% and 16%, respectively, compared to control plots. All in all, we concluded that the effects of biochar blended with farmyard manure differ mainly on soil texture.

Soil structure and organic matter are important indicators of soil quality. In the literature it states that there is a linear relation between soil structure and the organic matter. Mechanisms of formation and stabilization of aggregates have also been described in the literature, but it is evident that not every mechanism is applicable to various soil-climatic conditions. Recently, the modern but not the new term has become a biochar. It is anticipated that biochar is a significant source of C, and its application to the soil will improve the aggregation process in the soil. Lately we have been working in this area and we wanted to provide an overview of this issue through this review. The aim of this review was to collate and synthesize available information on soil structure and SOM. The emphasis of this review is on biochar and its combination with other organic and mineral fertilizers in relation to soil structure.