A. Stoyanova, M. Todorova

Abstract. A field study was conducted in the experimental field of Agricultural Institute, Stara Zagora. Examined the distribution of irrigation water in the soil profile in irrigation in furrow, maize grain. Experience is based on two soil types- Eutric Vertisol and Gleyic Chromic Luvisol. Humidity profiles before and after irrigation showed trends of distribution and redistribution of irrigation water in furrow irrigation, without irrigation and ridge between them. Due to the lateral filtration in both soil types it can be applied in furrow irrigation. The contours of wetting show that during the irrigation period readily available moisture in the active layer does not fall below wilting point. Soil moisture is accumulated in deep layers, which creates conditions for developing a strong root system of plants. Furrow irrigation for maize in the grain increases the productivity of irrigation water and effective use of precipitation fell during the irrigation season of maize grain.