نتایج جستجو برای: 30cm

تعداد نتایج: 278  

Journal: :Journal of water and health 2006
A D Karathanasis T G Mueller B Boone Y L Thompson

This study evaluated the effectiveness of soils with different texture and depth to treat fecal bacteria eluted from a house-hold septic effluent. The assessments were accomplished by leaching undisturbed soil monoliths of 30, 45, and 60cm thickness and 25cm in diameter, representing the four different textural groups and hydraulic loadings recommended by the Kentucky Health Department, with do...

Journal: :GSC Advanced Research and Reviews 2022

Mangroves (stretch of intertidal tropical and subtropical forests between inland coastal the sea) are being exploited at a rate that is unprecedented, there loss biodiversity because conflicting unsuitable uses. This study was aimed promoting protection mangrove associated within Tiko Limbe III municipalities in south western Cameroon, Central Africa via contribution buffer zone agroforestry. R...

Different construction materials with different roughness used to make circular weirs highly affect surface roughness and, in turn, flow hydraulics passing over these structures.  In the present research, numerous experiments under different hydraulic conditions were performed on a physical model to study the effects of roughness on flow hydraulics over a circular weir. The flow hydraulics incl...

ژورنال: علوم آب و خاک 2006
محمدحسن علی‌نیا, , مسعود کاووسی, , مریم پیکان, , ناصر دوات‌گر, ,

The soil potassium status and effect of soil physical and chemical properties on it were investigated using 109 surface soils (0-30cm) from four regions in Guilan province. Neutral molar ammonium acetate extractable K (K-NH4OAc), boiling molar nitric acid extractable K (K-HNO3) and water soluble K were determined. Results showed that CEC and clay were normally frequency distributed while distri...

Soil salinity is considered as one of the major challenges in coastal agriculture in Bangladesh yet geographical extent of soil salinity and nutrients status have received little or no attention. This study investigated the patterns of soil salinity, total nitrogen, phosphorous, potassium and sulfur between agricultural and fallow land along a 90 km distance from the coastline in Noakhali, Bang...

E Maroufpoor, M Behzadi Nasab

This study carried out on the provided textures at laboratory. The provided textures were infusedinside the PVC cylinder with 30cm height and 25cm diameter. The studied textures were loamysand, sandy loam, sandy clay-loam, clay loam and clay. After 24 hours of saturation, the soil watercontent of the samples was measured by oven-dry gravimetric and TDR methods. For each texturesat any stage of ...

اکبری نیا, مسلم, سلیمانی رحیم آبادی, معصومه, کوچ, یحیی,

According to importance of forests, enforcement of accurate and systematic management about them is necessary; in this regard recognition of soil quality is essential principles. With the aim of studying soil macroelement in each of Populus deltoiedes, Alnus subcordata, Taxodiom distichum stands and around uncultivated area (control), 8 samples taken from each of 0-15cm and 15-30cm depth. Soil ...

Journal: :Journal of Agricultural Sciences 2023

Purpose: Soil nutrient depletion and crop management practices are the significant factors affecting faba beans production over world. Biofertilizers can improve soil fertility health. Moreover, it adds essential nutrients improves water retention in soil. Thus, its use is unquestionable to maintain enhance production. Hence, biofertilizer rates inter-spacings were used bean Research Method: Th...

ژورنال: دانش آب و خاک 2014
عادل ریحانی تبار, محمد‌ رضا مقصودی نصرت اله نجفی,

دراین تحقیق ارزیابی چند روش عصاره‎گیری برای تعیین فسفر قابل‌ جذب گیاه ذرت در 25 نوع خاک سطحی (0-30cm) انجام گرفت. آزمایش به‎صورت فاکتوریل و بر پایه طرح  بلوک‎های کامل تصادفی با کشت گیاه ذرت (Zea mays L.) در شرایط گلخانه‌ای و در سه تکرار انجام گرفت. روش­های آب مقطر، کلرید کلسیم، پاو، اولسن، کالول، سلطانپور، مورگان، کلونا2 و کاغذ صافی­های آغشته به اکسید آهن جهت تعیین فسفر قابل‎ جذب گیاه ذرت به کا...

ژورنال: :دانش آب و خاک 2014
محمد رضا مقصودی عادل ریحانی تبار نصرت اله نجفی

دراین تحقیق ارزیابی چند روش عصاره‎گیری برای تعیین فسفر قابل جذب گیاه ذرت در 25 نوع خاک سطحی (0-30cm) انجام گرفت. آزمایش به‎صورت فاکتوریل و بر پایه طرح  بلوک‎های کامل تصادفی با کشت گیاه ذرت (zea mays l.) در شرایط گلخانه ای و در سه تکرار انجام گرفت. روش­های آب مقطر، کلرید کلسیم، پاو، اولسن، کالول، سلطانپور، مورگان، کلونا2 و کاغذ صافی­های آغشته به اکسید آهن جهت تعیین فسفر قابل‎ جذب گیاه ذرت به کار...

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