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Showing 4 results for Haghshenas
Factors Affecting Pasture and Meat Production Imbalance in Fars Province: A Case Study of Koohnamak Pastures in Darab
B. Najafi, A. Shirvanian, T. Haghshenas,
Volume 12, Issue 45 (fall 2008)
Abstract
In the process of agricultural development, sustainability of pasture utilization to ensure sustained production of meat and dairy products has become increasingly important. This article aims to study factors affecting pasture and meat production imbalances in Fars province. For this purpose, the transcendental production function was used. Data was collected by using two stage cluster random sampling from 71 producers. The results revealed that present method of pasture utilization is not compatible with increasing live animal meat production objective. To optimize pasture utilization, the pasture users should be advised to stop overgrazing. In addition, the results indicated that increasing livestock and pasture mismanagement causes damage to pastures and consequently would decrease meat production in the long-run.
Study of the Efficiency of Hybrid Subsurface Constructed Wetlands in Reducing the Organic Loading of Municipal Wastewater Treatment Plants Using Various Aquatic Plants
A. Haghshenas-Adarmanabadi, M. Heidarpour, S. Tarkesh-Esfahani,
Volume 20, Issue 77 (Fall 2016)
Abstract

In this paper, the efficiency of four hybrid horizontal-vertical subsurface constructed wetlands which have been built for the tertiary treatment of Isfahan North Wastewater Treatment Facility and removal of organic matters was evaluated. In these constructed wetlands three plants including Phragmites australis, Typha latifolia and Arundo donax were planted and one unit left unplanted. The results of 12 months of sampling showed that the type of vegetation has no significant influence on the organic matter removal in the subsurface constructed wetlands, although the removal efficiencies in the planted constructed wetlands were more than unplanted control one. The COD and BOD5 removal efficiency in the constructed wetlands changes between 77% to 83% and 84% to 86%, respectively, during the operation period. The results of this research also showed that the organic matter removal was dependent on the influent organics nature and biodegradability. The first order model constants were calibrated in different wetlands for designing main projects. The organic concentration in the wetland effluents met the Iranian regulation limits for different reuse applications that shows the constructed wetland is a suitable technology for wastewater treatment in Iran.


Principles of Conservation and Management of Shared Waters at the International Level
M. R. Haghshenas, M. A. Ardebili,
Volume 24, Issue 3 (Fall 2020)
Abstract
Public health of common waters in protecting the human's health is considered as "human delinquent" and environmental and natural health as "green offender" (silent offender) due to the terrestrial nature and the lack of the monopoly of works; so, the consequences of violating it in the territory of a particular state are of particular importance in the international public law. Therefore, protection of the harm caused by the breach of the public health of common waters is imperative by international institutions and States members of the international community. The supportive policy is a branch of public policy that "puts" various legal protections from the perpetrators of the violations of norms and regulations "in the form of coherent policies using its principal principles. These principles are a set of doctrines and coherent strategies that determine the policy and consequently, the way in which laws and regulations are imposed; as with the qualitative measure, it provides for the monitoring of rules and regulations. To make the present study, a review of the principles that underlie the principles of public health policy in international treaties and procedures is presented. The principles outlined in these sources are categorized into three categories: "justice-oriented", "cooperative-oriented" and "fair-minded". These principles can be used in protecting Iranian water health rights.

The Relationship between the Sensitivity to Rill Erosion and Soil Physical Degradability Due to the Land Use Change in Semi-Arid Pastures
A.r Vaezi, Kh. Sahandi, F. Haghshenas,
Volume 28, Issue 3 (Fall 2024)
Abstract
Water erosion can be affected by land use change and soil degradation by agricultural activities. This study was conducted to investigate the effects of land use change in poor pastures on soil physical degradation and water erosion in semi-arid regions. Experiments were performed in 42 soil samples taken from seven areas covering the two land uses: poor pasture and rainfed agriculture, which have different soil textures (clay loam, silty clay loam, sandy clay loam, silt loam, loam, sandy loam, and sandy loam). The physical characteristics of soils were measured in the samples of both types of land use and its changes were expressed as physical degradation of the soil. The soil's susceptibility to water erosion was measured under simulated rainfall with 50 mm h-1 intensity for 60 min. The results showed that the land use change in pastures leads to the physical deterioration of soils; so bulk density, porosity, macropore, field capacity, saturated point, aggregate size, and aggregate stability were degraded with a rate of 28, 22, 41, 11, 5, 62, and 63 percentages. The structural characteristics of soil (aggregate size and stability) had the highest physical deterioration due to the land use change in the pastures. The change in land use change greatly increased the sensitivity of soils to water erosion. A significant relationship was found between the susceptibility of water erosion and the soil's physical degradation. The soils with coarser and more stable aggregates have higher physical degradation by the land use change and in consequence show more susceptibility to water erosion.

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