نتایج جستجو برای: r 2002 seagull influence on soil properties

تعداد نتایج: 9202897  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1388

فرض کنیم r حلقه ای یکدار و شرکت پذیر باشد. بنابراین حلقه یک حلقه بئر (متناظراً شبه بئر) نامیده می شود، هرگاه پوچساز چپ هر زیرمجموعه ناتهی(متناظراً هر ایده آل) آن، توسط یک خودتوان تولید شود. در این پایان نامه، مقالات زیر را مورد بررسی و مطالعه قرار گرفته است: yi.z and zhou.y, baer and quasi-baer properties of group rings, journal of the australian mathematical society. 83 (2007), no. 2, 285-296 ...

2009
JAMES D. LEWIS George R. Kempf

Algebraic geometry is a mixture of the ideas of two Mediterranean cultures. It is the superposition of the Arab science of the lightening calculation of the solutions of equations over the Greek art of position and shape. This tapestry was originally woven on European soil and is still being refined under the influence of international fashion. Algebraic geometry studies the delicate balance be...

Journal: :Applied and environmental microbiology 2006
G Muscatello G A Anderson J R Gilkerson G F Browning

The ecology of virulent strains of Rhodococcus equi on horse farms is likely to influence the prevalence and severity of R. equi pneumonia in foals. This study examined the association between the ecology of virulent R. equi and the epidemiology of R. equi pneumonia by collecting air and soil samples over two breeding seasons (28 farm-year combinations) on Thoroughbred breeding farms with diffe...

2009
Rachael M. Steller Nicolas A. Jelinski Christopher J. Kucharik

There is an emerging need to estimate and verify soil carbon credits attributed to conservation tillage and prairie restoration in the Midwestern U.S. for the developing global carbon market. However, current soil sampling strategies may need to be augmented by empirical modeling to minimize costs while covering larger regions. Models were constructed relating soil bulk density (BD) to soil org...

Journal: :آب و خاک 0
دیانی دیانی رئیسی رئیسی

abstract cadmium is one of the heavy metals with a considerable importance for its potential toxic effects on soil microbial activities and composition. although, the toxic effect of cadmium on soil microbial activities is somewhat well-known, but the extent to which cd affects soil biota depends largely on soil properties and conditions, particularly soil organic matter contents. thus, the aim...

ژورنال: علوم آب و خاک 2019

Due to unsuitable soil physical conditions, calcareous soils, and the existence of a huge amount of sulfur in the country, the study of sulfur effects on the soil structure and other soil properties is necessary. Therefore, the effects of different rates of sulfur including: 0, 750, 1500 and 3000 kg/ha, when accompanied by Halothiobacillus neapolitanus bacteria, on the soil properties in the co...

Nowadays, applying soil amendments is one of the most important ways to cope with water shortages and improve soil physical properties. In this regard, a greenhouse experiment was conducted to study the effect of different levels of irrigation water and wheat straw biochar on physical and chemical properties of a sandy loam soil, after harvesting faba bean. The experiment was performed with 5 b...

ژورنال: علوم آب و خاک 2018
مظلوم علی آبادی, یونس, واعظی, علی رضا,

Water loss and nutrients loss are one of the important signs of natural resource degradation in the catchments. The amount of loss of these resources is affected by several factors including the characteristics of rainfall. In this study, the data of stream discharge (Q), total dissolve solids (TDS), and total nutrient loss ratio (NR) along with rainfall characteristics were analyzed for the ev...

Journal: :Civil engineering and architecture 2023

The implementation of natural and artificial fibers as a stabilization technique for construction materials has developed new trends in the last decade generated functionality. This research evaluates derived from polypropylene element soil reinforcement. These have advantage that they do not biodegradation or oxidation processes, which makes it cost-effective environmentally friendly option. a...

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