Memoire de 3e cycle en agronomie sur le chene vert (Quercus Rotundifolia Lamk ) et le chene zeen (Quercus canariensis willd) dans la foret de Jaaba au. See more of DZplante on Facebook. Log In. Forgot account? or. Create New Account. Not Now. English (US) · Español · Português (Brasil) · Français (France) ·. Suddenly, at a bend in the hill-path, where the wide branches of the cork oaks, the ilex, and the chêne-zeen met overhead, and the giant aloes grew abundantly, .

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In Tunisia, Holstein dairy cattle produced differently according cheene their calving month. The objectives of this study were 1 to identify the different shapes of lactation curves of Holstein cows under North Africa Chenw prevailing production environments and 2 to estimate parameters of the most dominant lactation curves found by season.

The incomplete gamma function was used to adjust milk lactation curves per calving season. A total of milk test zden of 67 cows in herds during was used in this study. A linear model was developed, including herd-test day, farm ownership, calving month, calving year, and lactation number, test year, age of cow and milk test number. Estimated milk lactation curve parameters by Wood’s Incomplete gamma function for the early lactation production aascending phase b ,descending phase cPeak production, peak date and persistence were 9.

Holstein cows, lactation, Wood, Gamma, season of calving. The objectives of this study were to: Records of a total of lambs collected over 10 years from to were used in this cene.

File:Yakouren – Wikimedia Commons

A linear model including the livestock sector state chdne privatefarm-herd-year of birth-lambing season, maternal age, and sex-mode of birth was used to identify the main sources of variation in the growth of Barbarine. Least squares solutions were used to estimate the performance adjustment coefficients for age of dam and sex-birth mode. The REML method was used for estimating heritability.

  LEY 26813 PDF

Sector, age of dam, sex-mode of birth, and farm-herd-year-in-season combination were found to be the major factors that significantly affect lamb growth from birth to weaning at 90 days. The phenotypic correlations between different weights were positive and ranging from 0. The estimated heritabilities ranged for the first group from 0. Reforestation efforts, in terms of production of lumber and industrial wood, both in quality and quantity, chebe dependent on the application of appropriate silvicultural methods zsen, thinning.

The density at that time was plants per hectare and plants throughout the serial.

Ina second inventory was carried out, where we noticed an increase in number of trees and consequently in volume which could be explained by a strong regeneration by sowing in the maquis, the enclaves and after the passage of fires and a lack of application of specific silviculture to these stands, something that we propose in this study that takes into account the social problem and able to ensure the sustainability, the preservation of the forest ecosystem and the production of wood.

Maritime pine, pruning, thinning, inventory, silviculture, volume. Although the physicochemical characteristics of raw milk, intended for drying, comply with the required standards, they nevertheless remain very variable from one delivery to another, and caused instability in the composition of the produced skimmed milk powder from one batch to another.

In fact, the fat content, protein content and defatted solids content of the different batches of skimmed milk powder were heterogeneous and ranged from 0 to 1.

Humidity content ranged from 3. Milk, composition, quality, transformation, drying.

Agri & BioTech – Journal of New Sciences

Three organic mulches Italian Stone Pine, Lentisk, a combination of Italian Stone Pine and Lentiskan inorganic mulch gravel and no mulch and two tree shelter types non-vented, vented and control were tested.


Tree shelters did not have a significant effect on the seedlings survival rate for both oaks, whereas they significantly improved their height growth compared to unsheltered seedlings; average growth rate in height inside non-vented and vented tree shelters was each year significantly greater, respectively, by 7. Contrary to height growth, average growth rate in diameter of the sheltered cork oak seedlings was, each year, significantly lower than that of the control by 2 mm for both non-vented and vented tree shelters.

For zeen oak, average growth rate in diameter inside the vented tree shelters was similar to that of the control, whereas average growth rate in diameter inside the non-vented tree shelters was significantly lower by about 1 mm each year. The use of mulching alone or in combination with tree shelters seemed to be useless for both oaks. This is because of the site fertility where the experimentation was carried out. This article is published under license to Journal of New Sciences.

File:Yakouren 2.jpg

Publication d’un nouveau ouvrage de Mr. Research and Practice – Thursday, 01 November Mourning on behalf of Pr. Boulbaba Rekik – Thursday, 13 July Lancement d’une nouvelle application pour les smartphones dans le secteur agricole en Tunisie: Plantix – Monday, 10 July Copyright This article is published under license to Journal of New Sciences.

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