The disposal of sludge on agricultural land has been tried out in numerous countries (Belgium, United States etc.). The purpose of these experiments is to establish whether the chemical composition ...of the sludge alters the chemical and biological equilibrium of the soil. After analyzing the chemical composition of the various types of sludge (biological sludge, sedimentation sludge etc) the author reaches the conclusion that the alterations produced in the soil are not likely to endanger its chemical and biological equilibrium. He nevertheless points out that these measurements were taken over a relatively short period of time.
ITALIANO: Lo smaltimento dei fanghi sui terreni agrari e stato sperimentato in molti Paesi (Belgio, Stati Uniti, ecc.). Scopo di questo lavoro e di vedere se la composizione chimica dei fanghi alteri l'equilibrio chimico e biologico del terreno. L'A. dopo aver analizzato la composizione chimica dei vari fanghi (biologici, di sedimentazione, ecc.) giunge alla conclusione che le alterazioni del terreno prodotte che tali valutazioni sono state effettuate per un periodo relativamente breve.
The commercial hybrid males with clinically normal reproductive potential, from two rabbitries with different hygienic standards, have been tested over six weeks obtaining 89 ejaculates. Semen was ...collected twice a week using an artificial vagina, with or without changing the sheath at every collection. The semen was promptly diluted in sterile tubes and used for A.I.. The first and the last doses of the ejaculates were packed in paillettes and stored under liquid nitrogen. Our cultures of the frozen rabbits semen revealed a variety, both of quality and quantity, of microbial contamination. Escherichia coli, Staphyloccus aureus, Clostridium perfringens were found in 8% to 46% of the samples. Pasteurella spp., Enterococcus spp., Pseudomonas spp., Bacillus spp. and Proteus spp. were sporadically present. The count differed between rabbitries and according to the method of semen collection. The differences were not statistically significant. The bacterial contaminants had little effect on fertility, nevertheless collection and processing of rabbit semen should always be done in such a way as to minimize contamination by microbiological agents
