نتایج جستجو برای: rangeland shrubs

تعداد نتایج: 6542  

Journal: :Remote Sensing 2011
Albert Rango Kris Havstad Rick Estell

By the early 1900s, concerns were expressed by ranchers, academicians, and federal scientists that widespread overgrazing and invasion of native grassland by woody shrubs were having severe negative impacts upon normal grazing practices in Western America. Ranchers wanted to reverse these trends and continue their way of life and were willing to work with scientists to achieve these goals. One ...

Rangeland vegetation dynamics can be affected by various natural and unnatural factors over time. The purpose of this study was to investigate the dynamics of vegetation under the climatic conditions and soil properties. Accordingly, data collection for evaluating vegetation dynamics in rangeland ecosystems of Ardabil province was conducted at three research sites including Moqan winter rangela...

Journal: :Rangeland Journal 2023

Increasing shrub density hinders cattle raising in central Argentina rangelands. While roller-chopping and hand-cutting are used to remove shrubs make land accessible for grazing, studies on the effects of these practices ecosystem composition, structure functioning scarce. We assessed impact removal (a) vegetation cover, species richness diversity (b) green biomass seasonal phenological dynami...

Journal: :journal of rangeland science 2013
reza dehghani bidgoli abulfazl ranjbarforoei davoud akhzari

information on different rangeland plants’ nutritive values during variousphonological stages is of importance for the rangelands management. this information helpsrangeland managers to choose proper grazing times to achieve higher animal performancewith no detrimental effects on the rangeland vegetations. effects of various plant parts’phenological stages and vegetation types on reserve carboh...

Journal: :مرتع و آبخیزداری 0
سیده زهره میردیلمی شناخت مهم ترین تغییر در مؤلفه های کمّی و کیفی پوشش گیاهی بر اثر قرق مراتع دشت کالپوش با استفاده از آنالیز چندمتغیره اسماعیل شیدایی کرکج دانشجوی دکتری علوم مرتع، دانشگاه علوم کشاورزی و منابع طبیعی گرگان موسی اکبرلو دانشیار گروه مرتع داری دانشگاه علوم کشاورزی و منابع طبیعی گرگان

considering the importance of vegetation changes and awareness of its destruction or improvement trends in programming and its proper managing of utilization, this study was conducted in order to survey the effects of grazing on the qualitative and quantitative components of vegetation (including life form, growth form, palatability class, plant families and species diversity) and recognition t...

2004
P. N. Macharia

A research study was conducted in Mashuru Division of Kajiado District, Kenya with the objective of analyzing the types of vegetation degradation, their causes and their influence on rangeland condition and trend. The study was conducted through remote sensing tools, ground truthing, interviews, community workshop and literature. The results of the study showed that excessive use of the woody s...

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