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This paper presents the results of empirical research on high quality beef production on the basis of the Cooperative "Agrofirm" Witkowo (Stargard Szczeciński poviat) and the individual farm Wyszobór. The research had been conducted on young crossbreed beef bulls with different genotypes in relatively intensive feeding conditions. The aim of the paper was the cost calculation of fodders per 1 kg gain in body weight in different raising systems. The first experiment consisted of young bulls genetically mixed of two or three races between Black-and-White x Red Angus crossed cows and Limousin meat breed bulls- (group I), Red Angus (group II) and Salers (group III). The second experiment consisted of young bulls from, group I - Charolais cows with Charolais bulls, group II - Hereford cows with Charolais bulls and group III - Simmental cows with Charolais bulls. In both cases young bulls from all the groups had a very good daily gain. A lower cost of fattening was noticed for the animals from experiment no. 2, where the animals had been raised in a pasture system with cow-mothers and had been better prepared for fattening.
Interrelationships between fine grid extract (as a dependent trait – X) and 6 independent traits (Y1, Y2…Y6): grain filling, malt protein, malt fragility, wort viscosity, diastatic power and fermentability were examined. The material for investigation was 235 varieties and strains of brewery spring barley examined in preliminary and secondary trials in 1999-2001.
Organic farming is based on harmony with the environment and promotes biodiversity and biological cycles. Products obtained from organic arable farms exhibit lower levels of pesticides along with a higher content of vitamin C, minerals, sugars and flavonoids, but probably also mycotoxins. Organic production methods seem to have a positive effect on meat, milk and egg quality, although the prohibition of antibiotic use may cause an increase in the frequency of bacterial and parasitic infections in consumers. Importantly, contamination of conventional food with chemicals and that produced from organic crops with fungal toxins may modulate immune system function.
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