نتایج جستجو برای: a 2000 small scale spatial soil plant relationship in semi arid gypsum environments

تعداد نتایج: 20655252  

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده ادبیات و علوم انسانی 1392

in this study, the relationship between teachers’ creative and critical thinking skills and their reflectivity in teaching was investigated. to this end, three questions were raised. these questions were intended to determine whether there was a significant relationship between teachers’ creative thinking skills and their reflectivity in teaching; whether there was a significant relationship be...

Journal: :international journal of advanced biological and biomedical research 2014
hamid reza asgari abdolghaium ghiami zahra saeedifar farshid ghaderifar

soil compaction has become a widespread problem in the world and is one of the factors involved in land degradation and declining crop yields, especially in the arid and semi-arid agriculture. the purpose of this study was to investigate the effects of subsoil compaction on morphological, physiological and agronomic aspects of wheat .the research was carried out in the experimental farms of anb...

2006
X. Cheng J. Chen B. Li Y. Liu S. Liu

We chose five communities, representing a mild to severe gradient of grassland desertification in a semi-arid area of Ordos Plateau, northwestern China, to explore the spatial relationships among plant species, above-ground biomass (AGB), and plant nutrients (N and P). Community 1 (C1) was dominated by Stipa bungeana; Community 2 (C2) by a mix of S. bungeana and the shrub Artemisia ordosica; Co...

Understanding ecological processes is a prerequisite for the management of rangelands; therefore, recognition of the relationship between environmental factors and vegetation is very important. The present research aims to investigate environmental and management factors affecting rangeland vegetation distribution in Saral rangelands of Kurdistan province, Iran, in 2017. Sampling was done...

2010
Liding Chen Jiping Wang Wei Wei Bojie Fu Dongping Wu

Large-scale vegetation restoration in China’s Loess Plateau has been initiated by the central government for controlling soil andwater losses in the past three decades. However, there is virtually no guidance for plant species selection for the restoration purpose. We investigated the effects of planting trees and shrubs, land-use conversions from croplands to pastures and native grasslands on ...

ژورنال: علوم آب و خاک 2020

In semi-arid regions, soils are weakly aggregated and subjected to water erosion processes especially rill and interrill erosion. There is no information on the rate of these water erosion types in semi-arid soils located in the hillslopes. Therefore, this study was conducted to determine the soils susceptibility to these erosion types in semi-arid region. A laboratory experiment was done in ei...

2017
Xiaodan Wang Xingxing Ma Yan Yan

Soil nutrients strongly influence biomass allocation. However, few studies have examined patterns induced by soil C:N:P stoichiometry in alpine and arid ecosystems. Samples were collected from 44 sites with similar elevation along the 220-km transect at spatial intervals of 5 km along the northern Tibetan Plateau. Aboveground biomass (AGB) levels were measured by cutting a sward in each plot. B...

2012
Dániel G. Knapp Alexandra Pintye Gábor M. Kovács

Dark septate endophytic (DSE) fungi represent a frequent root-colonizing fungal group common in environments with strong abiotic stress, such as (semi)arid ecosystems. This work aimed to study the DSE fungi colonizing the plants of semiarid sandy grasslands with wood steppe patches on the Great Hungarian Plain. As we may assume that fungi colonizing both invasive and native species are generali...

Journal: :Applied sciences 2022

In arid regions, starchy agricultural products such as wheat and rice provide essential carbohydrates, minerals, fibers vitamins. However, drought, desiccation, high salinity, potentially toxic metals hydrocarbon accumulation are among the most notable stresses affecting soil quality cereal production in environments. Certain bacteria, referred to Plant Growth-Promoting Rhizobacteria (PGPR), co...

2005
I. Caballero J. M. Olano A. L. Luzuriaga A. Escudero

Seed banks play a crucial role in arid plant communities because they confer stability and longterm persistence. However, seed banks have high temporal and spatial variability, with dramatic changes in density and composition. The aim of this study was to test whether seasonal change affected seed bank community structure and spatial pattern. Moreover, we wanted to know if the effect driven by ...

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