Acta fytotechnica et zootechnica, 3, 2000, 1

Ondrej DEBRECÉNI, Peter JUHÁS, Peter STRAPÁK
Occurance and behaviour of milk suckling dairy cows under different housing and calf rearing conditions...2
Mohamed Abdel Khaled RAHMAN
Studies on the embryology of the grasshopper Chrotogonus lugubris Blanchard (Orthoptera, Acridoidea, Pyrgomorphidae). I. Morphogenesis, rate of development and water requirements....6

Vendelín MUCHA, Peter SISÁK, Rastislav MUCHA
Formation of water-resistant structural aggregates in Orthic luvisol and their changes due to farming systems used....13

Ján TOMÁŠ, Jozef TÓTH, Peter LAZOR
The state of soil hygiene in lowland regions of Slovakia from the viewpoint of heavy metals contents in different extractants....16

Norbert GÁBORČÍK
Chlorophyll concentration (SPAD values) in leaves of cocksfoot (Dactylis glomerata L.) as indicator of nitrogen concentrations and production of grassland....21

Jozef TÓTH, Ján TOMÁŠ, Peter LAZOR
The evaluation of bioavailability of cadmium, lead, copper, zinc and chromium in heavily contaminated fluvisoil....25



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