Acta fytotechnica et zootechnica, 2, 1999, 2

	Milan BEŽO, Katarína HRUBÍKOVÁ Phenotypic markers obtained for embryogenic cells by subcultivation....29
	Lýdia JEDLOVSKÁ, Jaroslav NOSKOVIČ The dynamics of changes in chosen fractions of sulphur in the soil....33
	Vendelín MUCHA, Silvia BUJOKOVÁ The influence of a farming system on the content and composition of humus....36
	Eva CANDRÁKOVÁ, Ján BAKUĽA, Dušan KULÍK The regulation of production process of spring barley by nitrogen application....39
	Andrej GODÁNY, Jarmila FARKAŠOVSKÁ, Gabriela BUKOVSKÁ, Jozef TIMKO The effect of the actinophage infection on antibiotic producing strains of Streptomyces aureofaciens....44
	Jaroslav KOVÁČIK, Emília KOLLÁROVÁ, Peter MASSÁNYI, Róbert TOMAN Effect of metabolic endurance of dairy cows on chosen parameters of interior environment....46
	Anna MICHALCOVÁ, Emília BENCZOVÁ, Margita ČANIGOVÁ The influence of the manner of housing and milking on milk production and quality....49
	Peter MASSÁNYI, Vladimír UHRÍN, Alexander V. SIROTKIN, Jaroslav KOVÁČIK, Jaroslav SLAMEČKA, Róbert TOMAN Effects of cadmium on distribution of some elements and progesterone production in porcine granulosa cells....52