February 2007
Long-range persistent correlations in decade-long SPOT-VGT NDVI records of fire affected and fire un-affected sites
We investigated the fire-induced variability in the 1998-2003 time series of Normalized Difference Vegetation Index (NDVI) from SPOT-VEGETATION sensor for two different kinds of vegetation sites: fire un-affected and fire-affected. The statistical analysis, performed by using the detrended fluctuation analysis (DFA), showed that fires contribute in increasing the persistence of time dynamics of vegetation, driving...
February 2007
The desalination of salt water destine to irrigation by electrodialysis and its effects on the germination, growth and seed yield of wheat (Triticum durum Desf. Var.Karim)
Morocco is characterised by a semi-arid climate and by unlimited conventional fresh water especially underground water. Electrodialysis experiment to desalinise water for irrigation was conduced on underground water from the north of Morocco. The effects of the use of desalted water on the germination and growth and seed yield of wheat were monitored to determine the best yield from use of desalted...
February 2007
Relationships among milk production, reproductive traits, and herd life for Tunisian Holstein-Friesian cows
The objective of this study was to link productive life of Tunisian dairy cows to their performances of milk, fat, and protein yields and fertility traits. Data included 128,652 records collected from 1990 to 2004 on 47,276 Holstein-Friesian cows in 142 herds. A linear model that included fixed effects of herd-calving year, calving season, parity, and age at first calving was used to study variations of milk production,...
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