نتایج جستجو برای: nitrogen and phosphorous

تعداد نتایج: 16845547  

2007
Nobuo Ochiai Teruyo Ieda Kikuo Sasamoto Akihiro Fushimi Shuichi Hasegawa Kiyoshi Tanabe Shinji Kobayashi

A method for characterization of airborne particles including the nanoparticles fraction with a diameter of 29-58 nm in roadside atmosphere has been described. The method consists of thermal extraction (TE) and comprehensive two-dimensional gas chromatography (GC x GC) with novel detection capabilities, including high resolution time-of-flight mass spectrometry (HRTOF-MS), and simultaneous sele...

1999
Helge Brattebø

INTRODUCTION Safe wastewater treatment methods have always been a challenge to the society. During the last 50 years, pollution abatement measures have been given high priority, particularly discharges from the growing urban areas. Early objectives were to reduce the emissions of organic matter and pathogens, while other objectives related to the emission of heavy metals and nutrients (phosphor...

امینی دهقی, مجید, احمدی, جعفر, علیجانی, میثم, مدرس ثانوی, سید علی محمد,

German Chamomile (Matricaria recutita L.) is an annual plant from the compositeae family. Effects of three levels of urea (0, 40, 80 Kg.ha-1) and triple super phosphate (0, 30, 60 [Kg.ha-1) on the yield and essential oil production of chamomile was investigated. The experiment was a factorial on the basis of randomized complete block design with three replications conducted at Shaded University...

Journal: :Mesopotamia Journal of Agriculture 2022

A pot experiment was conducted under greenhouse conditions to study the effect of phosphorus fertilization soil moisture content on some growth indicators, yield and seed nitrogen phosphorous for two wheat cultivars, Adnaniah Sham-6, in calcareous suffering from a lack available phosphorus. The results indicated that led an improvement plant growth, as it caused increase relative water leaves, ...

Journal: :IOP conference series 2023

Abstract The experiment was conducted in the season (2020-2021) one of greenhouses second research station College Agriculture at University Al-Muthanna, this study carried out to find effect adding yeast fodder three concentrations (0, 5.0, 10.0 gL −1 ) as well nano fertilizer 0.5, 1.0 ml L ). Where on eggplant planted greenhouses, irrigation system these houses drip technology, with random re...

Journal: :بوم شناسی کشاورزی 0
مهدی نقی زاده محمد گلوی گلوی

intercropping is considered as a method for increasing yield per unit and stability. in order to evaluate the effects of phosphorous biofertilizer and chemical phosphorous on fodder quality of corn (zea mays l.) and grass pea (lathyrus sativa l.) intercropping, two field experiments were conducted as factorial based on randomized complete block design with four replications at two places simult...

2008

Enhanced sequestration of plant-carbon (C) inputs to soil may mitigate rising atmospheric carbon dioxide (CO2) concentrations and related climate change but how this sequestration will respond to anthropogenic nitrogen (N) and phosphorous (P) deposition is uncertain. We couple isotope, soil C fractionation and mesocosm techniques to assess the sequestration of plant-C inputs, and their partitio...

Journal: :Biomedical and environmental sciences : BES 2007
P W Anton Perera Zhi-Ying Han Ying-Xu Chen Wei-Xiang Wu

OBJECTIVE To investigate the feasibility of nitrogen and phosphorus recovery from swine waste biogas digester effluent and the effects of pH and NH4+: Mg2+: PO4(3-) molar ratio on its precipitation. METHODS Precipitation experiments with swine waste biogas digester effluent were conducted at pH 7.5, 8.0, 8.5, and 9.0 together with NH4+: Mg2+: PO4(3-) molar ratios 1: 0.2: 0.08, 1: 1: 1, and 1:...

2010
Larry V. Benson

Maize is the New World’s preeminent grain crop and it provided the economic basis for human culture in many regions within the Americas. To flourish, maize needs water, sunlight (heat), and nutrients (e.g., nitrogen). In this paper, climate and soil chemistry data are used to evaluate the potential for dryland (rainon-field) agriculture in the semiarid southeastern Colorado Plateau and Rio Gran...

Journal: :Agriculture 2022

A study was conducted to compare the composition of equine manure as removed from stall, and bedding-free on six horse farms. The farms ranged a pleasure stable with poorly managed stalls an intensively for racehorses. characteristics measured included: moisture content, total nitrogen, ammoniacal nitrate organic phosphorous (expressed P2O5), potassium K2O), calcium, magnesium, sulfur, zinc, co...

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