نتایج جستجو برای: hydrometer

تعداد نتایج: 138  

Journal: :پژوهش های زراعی ایران 0
عبدالجلیل یانق محمد خواجه حسینی

nineteen irrigated farms of canola from six cities of khorasan selected to assess the seedling emergence one month after sowing in 2009. soil texture of each farm determined using the hydrometer method. the results showed that weather conditions of sowing areas had no significant effect on emergence of oilseed rape. with increasing the temperature (within the range of 19.5 to 21.5 ˚c) emergence...

Journal: :Naukovì zapiski 2022

The article substantiates the professional significance of formation competencies in chemistry and learning outcomes higher education specialty "Technologies medical diagnostics treatment" process studying discipline "Technique laboratory work". It is proved that this integrates knowledge technique chemical experiment, particular – preparation solutions certain concentrations, which immense imp...

One of the simple methods for erosion control, flood mitigation and flood damage reduction in the streams is building the check-dams. The present study was carried out to evaluate the performance of check-dams, location across the streams in the retention of the fine sediments in Dam-tang watershed in Darab Iran. For this purpose, two of streams with many stabilized check-dams which were more t...

Journal: :Agriculture 2023

In the literature, mainly particle-size distribution (PSD) analyses in soil catenas, of e.g., moraine and riverine landscapes were discussed. Analysis comparison PSD (ML) ice-dammed lakes (ID-LL) not studied. Since landscape origin has diversified relief is under intensive agricultural use, aspects erosion are great importance. The changes studied 14 catenas (toposequences) eroding soils at upp...

Journal: :Applied and Environmental Soil Science 2021

Accumulation and deposition of sediments in waterbody affect the seepage capacity that could lead to improper water balance results level rise. This study analysed influence sedimentation on Lake Nakuru impact sediment characteristics flow rate formation at lake bed level. The was performed by sampling analysing cores from two locations lake. hydraulic properties, i.e., moisture porosity, parti...

Journal: :Europan journal of science and technology 2022

Stabilizing of soils can be done with physical, chemical and hydraulic methods. Chemical stabilization is one the most widely used method among them. In this study, low plasticity Çatalağzı clayey soil chosen as a research material. F type fly ash are additive. Soil mixed various amount (0%, 10%, 20% 30%) ash. Index tests (hydrometer, specific gravity, liquid limit, plastic limit standard compa...

ببرنژاد زیارت, هانیه, ذوالفقاری, علی اصغر, هاشمی, علی اصغر, کیانیان, محمدکیا, یزدانی, محمدرضا,

The objective of current study was to invstigate the accuracy of Tyler and Wheatcraft, Bird et al. and Kravchenko and Zhang fractal models in describing particle size distribution (PSD) of sediment in 14 successive check dams for two depths of 0-15 and 15-30 cm. Sediment PSD were determined in 28 samples using hydrometer method . The referred fractal models were fitted on sediments PSD data. Re...

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