نتایج جستجو برای: forest grazing

تعداد نتایج: 120565  

1999

Grazing cattle on forest plantations in the interior of British Columbia is a common practice. Soil compaction can occur following cattle use, although this may vary with stocking rate, vegetation type and age, soil type, soil water content, and climate. Several studies have shown that increased soil compaction can have a negative impact on growth of young tree seedlings and on productivity in ...

1994
Claudia Anderle Mario Fedrizzi Silvio Giove Robert Fullér

In many cases it is under legislative mandate to manage publicly owned forest resources for multiple uses (i.e., timber production, hunting, grazing). Forest resources have some particular characteristics which make rather difficult their management. In fact they are a typical example of a joint production (market and social goods) and therefore every management policy must face tradeoffs betwe...

Journal: :Conservation biology : the journal of the Society for Conservation Biology 2006
Jon E Keeley

Fire management practices affect alien plant invasions in diverse ways. I considered the impact of six fire management practices on alien invasions: fire suppression, forest fuel reduction, prescription burning in crown-fire ecosystems, fuel breaks, targeting of noxious aliens, and postfire rehabilitation. Most western United States forests have had fire successfully excluded for unnaturally lo...

1999

Chaparral lands of central Arizona are important for water production. They are also used as grazing lands for livestock and as habitat for wildlife. An understanding of the relation of grazing to runoff and erosion is thus essential to the development of management systems for sustained high yields. This paper reports the effects of grazing on runoff and erosion as determined on four experimen...

Esmaeil Khosropour Maziar Haidari Vahid Etemad

Regeneration and forest durability guarantee is one of the most important aspects of forest sustainability and it should be placed in forest plans priority. To compare regeneration in the two grazed and non-grazed forest, Baghe-shady forest located in Khatam city (it has the preservative regions that they are 20 years old), Yazd province, Central of Iran was selected. For this purpose, 60 sampl...

2001
Thomas A. Forge Andrea M. Muehlchen Suzanne W. Simard

This Extension Note describes some effects of clearcut harvesting and broadcast NPS fertilization on nitrogen (N) mineralization and components of the soil food web at three sites in the ICHmw subzone. We found that the forest floor in clearcuts had lower fungal hyphal lengths, total microbial biomass, microbial biomass N, and potential N mineralization than the forest floor in adjacent forests...

2012
BHAT MOHD SKINDER ASHOK K. PANDIT

The present investigation of forest ecosystem was undertaken during May 2010 to Dec 2010. The main aim of the study was to analyze the impact of biotic interferences on Yousmarg forest ecosystem. The cumulative effect of the biotic interferences was signif icantly seen in the reduction of vegetation cover. The present study revealed that the prominent factor for the exploitation of the vegetati...

2005
Victoria A. saab

Livestock grazing is a widespread and important influence on neotropical migratory birds in four major ecosystems in western North America: grasslands of the Great Plains and Southwest, riparian woodlands, Intermountain shrubsteppe, and open coniferous forests. We have reviewed available literature on avian responses to grazing in these habitats. Among 35 plains species for which data are avail...

Esmaeil Khosropour Maziar Haidari Vahid Etemad

Regeneration and forest durability guarantee is one of the most important aspects of forest sustainability and it should be placed in forest plans priority. To compare regeneration in the two grazed and non-grazed forest, Baghe-shady forest located in Khatam city (it has the preservative regions that they are 20 years old), Yazd province, Central of Iran was selected. For this purpose, 60 sampl...

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