نتایج جستجو برای: soil media

تعداد نتایج: 457999  

2017
Stefan Jenkins Tami L. Swenson Rebecca Lau Andrea Rocha Alex Aaring Terry C. Hazen Romy Chakraborty Trent Northen

19 Exometabolomics enables analysis of metabolite utilization of low molecular weight organic 20 substances by soil isolates. Environmentally-based defined media are needed to examine ecologically 21 relevant patterns of substrate utilization. Here, we describe an approach for the construction of defined 22 media using untargeted characterization of water soluble soil metabolites. To broadly ch...

2008
A. E. Hartemink

In the 1990s and early 2000s, there was widespread pessimism on the status of soil science in most parts of the world. This was mainly due to dwindling research budgets, reduced number of students and the overall perception that soil science and pedology were dead and buried. Renewed interest in agriculture for food, feed and fuel has brought soils back onto the global research agenda. Soil ero...

D.S.A. Wijesundara J.W. Damunupola S.A. Krishnarajah S.M.K.H. Wijayabandara W.A.M. Daundasekera

Ophiopogon japonicus is a perennial, ornamental foliage plant, whichbelongs to the family Liliaceae. It has a high demand in the local andinternational export market due to the presence of glossy white-green stripped lanceolate leaves. Improved leaves and plants of O. japonicus will be more popular in the floriculture industry. Hence, objective was to investigate the growth responses of O. japo...

ژورنال: علوم آب و خاک 2004
محمدرضا نیشابوری, , حسین رضائی, , علیرضا سپاسخواه, ,

Hydraulic coefficients of a porous media such as hydraulic conductivity K(θ) and diffusivity D(θ) have a controlling role in the evaluation of groundwater flow and pollutant transport behavior. Therefore, successful porous media flow evaluation depends on the accurate determination of its hydraulic coefficients. But it is hard and time consuming to measure. Values for these coefficients accurat...

Journal: :آب و خاک 0
قهرمان قهرمان داوری داوری آستارایی آستارایی مجیدی مجیدی تمسکی تمسکی

abstract irrigation planning and management requires continious monitoring and measurements of soil moisture content. application of gypsum blockes (gb) are common in soil moisture measurements. gb readings are subjected to its geometry and soil solution concentration. this study was carried on 90 gb in research greenhouse of faculty agricultural, ferdowsi university of mashhad. at the begining...

2005
Rakesh Govind

Air biofiltration is a promising technology for control of air emissions of biodegradable volatile organic compounds (VOCs). In conjunction with vacuum extraction of soils or air stripping of ground water, it can be used to mineralize VOCs removed from contaminated soil or groundwater. The literature (1) describes three major biological systems for treating contaminated air bioscrubbers, biotri...

2010
Wei Zhang Jianzhi Niu Verónica L. Morales Xincai Chen Anthony G. Hay Johannes Lehmann Tammo S. Steenhuis

Biochar land application can potentially be used for carbon sequestration, improving soil quality, and reducing non-point source pollution. Understanding biochar mobility is important because its transport in soil greatly influences its stability, the dynamics of soil microbial communities and organic matter, and the movement of biochar-associated contaminants. Here, the transport of biochar pa...

2013
Wioletta A. Żukiewicz-Sobczak Grażyna Cholewa Ewelina Krasowska Jolanta Chmielewska-Badora Jacek Zwoliński Paweł Sobczak

INTRODUCTION INTRODUCTION Due to the specific work environment, farmers are exposed to various biological occupational hazard. Among these factors significant are fungi present in the grain and also in the soil. The fungi may be the cause of human diseases including skin infections, asthma, allergic rhinitis and many others. AIM The aim of this study was to quantify and identify species of...

Journal: :Remote Sensing 2016
Thomas Jagdhuber

Focusing on scattering from natural media, dihedral (double bounce) scattering is often characterized as a soil-trunk double Fresnel reflection, like for instance, in most model-based decompositions. As soils are predominantly rough in agriculture, the classical Rank 1 dihedral scattering component has to be extended to account for soil roughness-induced depolarization. Therefore, an azimuthal ...

2005
Weixin Cheng Shenglei Fu Richard B. Susfalk Robert J. Mitchell

• Tree root respiration utilizes a major portion of the primary production in forests and is an important process in the global carbon cycle. Because of the lack of ecologically relevant methods, tree root respiration in situ is much less studied compared with above-ground processes such as photosynthesis and leaf respiration. • This study introduces a new 13 C natural tracer method for measuri...

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