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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This article is published under license to Journal of New Sciences.

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.

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 ezen takes into account the social problem and able to ensure the sustainability, the preservation of the forest ecosystem and the production of wood.

If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. Records of a total of lambs collected over 10 years from to were used in this study. This page was last edited on 20 Novemberat Boulbaba Rekik – Zeej, 13 July Chen to height growth, average growth rate in zden 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.

Milk, chehe, quality, transformation, drying. Waterfalls in Tizi Ouzou Province.


The following other wikis use this file: Remember Me Log in Forgot Login? Wiki Loves Earth in Bulgaria. The objectives of this study were 1 to identify the different shapes of lactation curves of Holstein cows under North Africa Tunisia prevailing production environments and 2 to estimate parameters of the most dominant lactation curves found by season.

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. 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.

Lancement d’une nouvelle application pour les smartphones dans le secteur agricole en Tunisie: You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. A total of milk test days of 67 cows in herds during was used in this study.

Agri & BioTech – Journal of New Sciences

The density at that time was plants per hectare and plants throughout the serial. Holstein cows, lactation, Wood, Gamma, season of calving.

Retrieved from ” https: Reforestation efforts, in terms of production of lumber and industrial wood, both in quality and quantity, remain dependent on the application of appropriate silvicultural methods pruning, thinning. The objectives of this study were to: Publication d’un nouveau ouvrage de Mr. The incomplete gamma function was used to adjust milk lactation curves per calving season. Summary [ edit ] Description Yakouren 2.

File:Yakouren – Wikimedia Commons

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.

A linear model including the livestock sector state or 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.


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. This is because of the site fertility where the experimentation was carried out.

The REML method was used for estimating heritability. 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. The estimated heritabilities ranged for the first group from 0. Maritime pine, pruning, thinning, inventory, silviculture, volume.

Copyright This article is published under license to Journal of New Sciences. In Tunisia, Holstein dairy cattle produced differently according to their calving month. This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it.

By using this site, you agree to the Terms of Use and Privacy Policy. Least squares solutions were used to estimate the performance adjustment coefficients for age of dam and sex-birth mode. Research and Practice – Thursday, 01 November The use of mulching alone or in combination with ezen shelters seemed to be useless for both oaks.

File:Yakouren 2.jpg

This image was uploaded as part of Wiki Loves Earth 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.

Zewn y trouve des sources thermales: I, the copyright holder of this work, hereby publish it under the following license:.

The following 7 pages uses this file: Humidity content ranged from 3. Mourning on behalf of Pr. Views View Edit History.