نتایج جستجو برای: dryland farming

تعداد نتایج: 27257  

Journal: :FEMS microbiology ecology 2012
Andrew Bissett Guy C J Abell Levente Bodrossy Alan E Richardson Peter H Thrall

Despite their large areas and potential importance as methane sinks, the role of methane-oxidizing bacteria (MOB) in native woodland soils is poorly understood. These environments are increasingly being altered by anthropogenic disturbances, which potentially alter ecosystem service provision. Dryland salinity is one such disturbance and is becoming increasingly prevalent in Australian soils. W...

2015
Trenton E. Franz Elizabeth G. King Kelly K. Caylor David A. Robinson

[1] In dryland ecosystems, understanding the effects of heterogeneity in soil moisture and geophysical properties on vegetation structure and dynamics poses a suite of challenging research questions. Heterogeneity in soil depth can affect resource availability and the subsequent organization of woody vegetation, while spatiotemporal variation in soil moisture can reveal important ecohydrologica...

Journal: :The New phytologist 2013
Mark E Olson Julieta A Rosell

Variation in angiosperm vessel diameter is of major functional significance. In the light of recent models predicting optimal vessel taper given resistance imposed by conductive path length, we tested the prediction that plant size should predict vessel diameter, with dryland plants having narrower vessels for their stem sizes. We assembled a comparative dataset including vessel and stem diamet...

Journal: :آب و خاک 0
جابر رحیمی علی خلیلی جواد بذرافشان

the estimation of effective rainfall is an important technique for exploiting the rainwater resource, planning for irrigation in irrigated agriculture, and determining changes in dryland wheat products for country's macroeconomic management. in this research, a two-layer soil-water balance model based on a new approach has been formulated to estimate the effective rainfall in dryland wheat crop...

Journal: :Climate Risk Management 2021

Water scarcity is amongst the major challenges threatening smallholder sheep production in subsistence-oriented communal farms dryland areas. Local contextual factors are a prerequisite for effective policy development and optimisation of water resources management production. Two-hundred fifty-two structured questionnaires were administered to investigate that influence farmers’ perceived impa...

Journal: :IOP conference series 2021

Each body needs some foods to consume every day. But produce food in all region face many factors as challenges. Challenges that farmers always the dryland are limited water for supplying crop, and soil has low fertile input production into manage farming system. In addition, producing crops on COVID-19 Pandemic new challenges like availability of production, distribution, marketing products. H...

Journal: :Perspectives in plant ecology, evolution and systematics 2014
Santiago Soliveres Fernando T Maestre

Previous syntheses on the effects of environmental conditions on the outcome of plant-plant interactions summarize results from pairwise studies. However, the upscaling to the community-level of such studies is problematic because of the existence of multiple species assemblages and species-specific responses to both the environmental conditions and the presence of neighbors. We conducted the f...

Journal: :Remote Sensing 2015
Jessica J. Walker Kirsten M. de Beurs Randolph H. Wynne

Baseline information about dryland forest phenology is necessary to accurately anticipate future ecosystem shifts. The overarching goal of our study was to investigate the variability of vegetation phenology across a dryland forest landscape in response to climate alterations. We analyzed the influence of site characteristics and climatic conditions on the phenological patterns of an Arizona, U...

Journal: :Applied and environmental microbiology 2012
Olga V Mavrodi Dmitri V Mavrodi James A Parejko Linda S Thomashow David M Weller

This work determined the impact of irrigation on the seasonal dynamics of populations of Pseudomonas spp. producing the antibiotics phenazine-1-carboxylic acid (Phz(+)) and 2,4-diacetylphloroglucinol (Phl(+)) in the rhizosphere of wheat grown in the low-precipitation zone (150 to 300 mm annually) of the Columbia Plateau of the Inland Pacific Northwest. Population sizes and plant colonization fr...

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