نتایج جستجو برای: soil profile salinity

تعداد نتایج: 418613  

2003
D. L. Corwin S. M. Lesch

ance. In addition, the salt composition of the soil water influences the composition of cations on the exchange Due in large measure to the prodigious research efforts of Rhoades complex of soil particles, which influences soil permeand his colleagues at the George E. Brown, Jr., Salinity Laboratory ability and tilth, depending on salinity level and exover the past two decades, soil electrical ...

2016
Rongjiang Yao Jingsong Yang Danhua Wu Wenping Xie Peng Gao Wenhui Jin

Reliable and real-time information on soil and crop properties is important for the development of management practices in accordance with the requirements of a specific soil and crop within individual field units. This is particularly the case in salt-affected agricultural landscape where managing the spatial variability of soil salinity is essential to minimize salinization and maximize crop ...

2002
JAFARI Mohammad

Study area was selected from Talou farm to Chahjam Kavir in Damghan. Several plant types were distinguished in mentioned site. The types were Artemisia herba alba-Pteropyrum olivieri, Anabasis aphyllaLycium depressum, Tamarix. spp.-Halocnemum strobilaceum, Ha. strobilaceum Halostachys bellangeriana, Ha. strobilaceum-Limonium iranicum. In each plant type, three dominant plant species were select...

Journal: Desert 2018
A.A. Vali M. Pakparvar M. Samiee R. Ghazavi,

Saline lakes can increase the soil and water salinity of the coastal areas. The main aim of this study is to distinguish the characteristics of the spectral reflectance of saline soil, analyze the statistical relationship between soil EC and characteristics of the spectral reflectance of saline soil, and to map soil salinity east of the Maharloo Lake. The correlation between field measurements ...

محمدی, جهانگرد ,

This study addresses the methodology of studying spatial variability of soil salinity. The information used is based on a semi-detailed soil survey, followed by a free survey, conducted in Ramhormoz, Khuzestan. The study of soil salinity variations was carried out using about 600 sampling points with an average distance of 500 m, at three depths of 0-50, 50-100, and 100-150 cm. To determine the...

Journal: :Ecology letters 2018
Jose B Lanuza Ignasi Bartomeus Oscar Godoy

Theory argues that both soil conditions and aboveground trophic interactions have equivalent potential to limit or promote plant diversity. However, it remains unexplored how they jointly modify the niche differences stabilising species coexistence and the average fitness differences driving competitive dominance. We conducted a field study in Mediterranean annual grasslands to parameterise pop...

2007
A. BANNARI

Around the world, especially in semi-arid regions, millions of hectares of irrigated agricultural land are abandoned each year because of the adverse effects of irrigation, mainly secondary salinity and sodicity. Accurate information about the extent, magnitude, and spatial distribution of salinity and sodicity will help create sustainable development of agricultural resources. In Morocco, sout...

Ebrahim Pazira zahra abdollahpour,

Accumulation of soluble salts in arid areas which are similar to most regions of Iran is inevitable in soil surface and profile because of low precipitation and high evaporation. High concentration of soluble salts in soil profile caused severe problems for root water uptake thus plant growth stopped. Reducing soil salinity to optimized content by leaching and avoiding soil pounding must be con...

2014
Haifeng Gao Junhong Bai Xinhua He Qingqing Zhao Qiongqiong Lu Junjing Wang

Soil nitrogen (N) mineralization in wetlands is sensitive to various environmental factors. To compare the effects of salinity and temperature on N mineralization, wetland soils from a tidal freshwater marsh locating in the Yellow River Delta was incubated over a 48-d anaerobic incubation period under four salinity concentrations (0, 10, 20 and 35‰) and four temperature levels (10, 20, 30 and 4...

2017
Jose B. Lanuza Ignasi Bartomeus Oscar Godoy

Theory argues that both soil conditions and aboveground trophic interactions are equally important for 14 determining plant species diversity. However, it remains unexplored how they modify the niche di erences 15 that stabilise species coexistence and the average fitness di erences driving competitive dominance. 16 We conducted a field study in Mediterranean annual grasslands to parameterise p...

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