نتایج جستجو برای: modified rangeland

تعداد نتایج: 253506  

ارزانی, حسین, برهانی, مسعود, بصیری, مهدی, زارع چاهوکی, محمدعلی, فرح‌پور, مهدی,

In order to investigate the effects of range management plans on species diversity, richness and evenness in Semirum rangelands, 52 sites (28 with treated plan and 24 without treated plan) were selected. The non-parametric indices for species richness (Margalof, Menhinick, Jacknife and counting method) and species diversity (Simpson, Camargo, Smith and Wilson and modified Nee) were compared in ...

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...

A standardized sampling technique for measuring plant diversity is needed to assist in resource inventories and for monitoring long-term trends in vascular plant species richness.With considering to the estimated richness amount (via different methods) are changing influenced by interaction of plot distance and shape, and also, presenting of a plot design (that can be near to reality) is import...

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...

Journal: :Journal of animal science 1993
P L Sims

Replicated cow herds of 15 Angus x Hereford (AH) and 15 Brahman x Hereford (BH) F1 cows each were placed on native rangeland (NR) or native rangeland-complementary forage (NRCF) systems. The NR was 8.1 ha of sagebrush-mixed prairie per cow-calf unit and the NRCF used the same mixed prairie complemented by .4 ha of double-cropped winter wheat and summer annual forage replacing about 30% of the m...

Journal: :Rangeland Ecology & Management 2021

Rangeland production is a foundational ecosystem service and resource on which livestock, wildlife, people depend. Capitalizing recent advancements in the use of remote sensing data across rangelands, we provide estimates herbaceous rangeland from 1986 to 2019 at 16-d annual time steps 30-m resolution western United States. A factorial comparison this dataset three national scale datasets prese...

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