This study attempted to evaluate the relationship between mineral nitrogen (Nmin) content andsoil pH in the 60-90 cm layer of grassland soils relative to other selected agricultural fodder crops. The area of the study uniformly covered the whole territory of Poland. The dependence between Nmincontent and soil pH was expressed ascorrelation coefficients, while their significancewasevaluated using the one-way non-orthogonal analysis of variance classification.Regardless of sampling date (spring or autumn) and land use (meadow, pasture, hay and pasture or alternate),soil pH had a significant effect on Nminconcentration. The correlation between Nminand soil pH in grasslandson mineral soils was positive, regardless of soil sampling date. In turn, in organic soils a negative correlation between pH and Nmincontent was observedin the spring period, whereas in autumn this trend did not persistand the correlation was positive. On the other hand, in the case of agricultural fodder crops (maize or mixed cereal) Nmincontent in the 60-90 cm layer and soil pH were found to be positively correlated, regardless of spring or autumn sampling date, with a correlation coefficient higher than 0.9.The obtained resultscan be used for diminishing environmental hazards.