نتایج جستجو برای: rangeland

تعداد نتایج: 2797  

Journal: :journal of rangeland science 2011
mohammad hassan jouri dina askarizadeh vahid rahimi mohammad mahdavi

mountainous rangeland ecosystems have a highly delicate position in ecologic areabecause of severe environmental conditions and having wildlife and livestock. knowing andrealizing the biotic and abiotic components, which have an interaction with each other in thisecosystem, perform the most important role in to desirable management of it. the systematicmanagement is one of the managing features...

2016
Elena V. Danzhalova S. N. Bazha P. D. Gunin T. I. Kazantseva

The research shows that widely used key measures of vegetation structure (species diversity, projected cover and above-ground phytomass) are not always suitable as indicators of pasture degradation. Based on an analysis above-ground phytomass composition, new quantitative indices are offered that give a more realistic picture of rangeland condition in Mongolia.

Journal: :journal of rangeland science 2013
mona fakhre ghazi mohammad hasan jouri vahid gholami

subalpine rangeland as a rara avis ecosystem is very important because ofecological features. consistency and resistance of this ecosystem is so frangible and itsnatural equilibrium is instable due to the effects of biotic and abiotic factors. the landslideas one of negative consequences in upland area is seen in masoleh watershed (north ofiran). this study has investigated the roles of biotic ...

Journal: :Current Opinion in Environmental Sustainability 2021

Rangeland climate services — knowledge resources that integrate information on to facilitate decision-making for ranchers and pastoralists have the potential sustainable decisions under variable conditions. Yet design of often fails fully address behavioral, cultural, social, institutional factors motivate or disincentivize end-users. Thus, we review how research risk uncertainty preferences, d...

Journal: :journal of rangeland science 0
khosrw shahbazi forests and rangelands research institute of iran ali salajagheh 2faculty of natural resources, tehran university, iran mohammad jafari faculty of natural resources, tehran university, iran hassan ahmadi faculty of natural resources, tehran university, iran aliakbar nazarisamani faculty of natural resources, tehran university, iran mohammad khosrowshahi 3forests and rangelands research institute of iran

negative impacts of gully erosion in marly areas are severe due to improper landuse practices such as irrigation, tillage, overgrazing and degradation of vegetation cover. the objective of this research was to evaluate gully thresholds related to plant vegetation cover and landuse change in the agriculture (ag), fair rangeland (fr) and weak rangeland (wr) areas of ghaasr-e-shirin, kermanshah, i...

2006
James S. Jacobs Roger L. Sheley John J. Borkowski

Leafy spurge is an invasive Eurasian weed on pastures and rangeland in North America where it reduces grass forage production. Our objective was to determine the effects of multispecies grazing combined with Aphthona flea beetles on leafy spurge-infested rangeland. On two westernNorth Dakota sitesdivided into four25to79-hapastures, two grazingduration treatmentswere applied: season-long with 7 ...

2017
Mathew Brust W. W. Hoback Robert J. Wright MATHEW L. BRUST

2008
J. G. Han Y. J. Zhang C. J. Wang W. M. Bai Y. R. Wang G. D. Han L. H. Li

Rangelands of China have for centuries provided forage for livestock but now their role in water, soil, and biodiversity conservation is being recognised by Governments and people. However, much of the rangelands has recently degraded anddesertification is nowawidespread problem.The cause of the degradation is over-grazing andover-cultivation. Climate change is exacerbating theproblem.TheChines...

Journal: :Agriculture 2021

Political instability (PI) occurs between governments and other political elites either at the local, regional, and/or national levels. Planning, implementing, monitoring of sustainable rangeland management strategies have a significant impact on environment an area. In this study, term PI implies unsafe unstable exercise power, is major obstacle to implementation management. The main purpose r...

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