in order to investigate the effects of organic, chemical and biological fertilizers on crude protein and oil yields and fatty acids composition in black seed (nigella sativa l.), a field experiment was conducted at agricultural research station of ferdowsi university of mashhad, iran, in 2009-2010. the experiment was arranged by using a complete randomized block design based on factorial arrang...

Controlled release urea (CRU) is considered to enhance crop yields while alleviating negative environmental problems caused by the hazardous gas emissions that are associated with high concentrations of ammonium (NH₄⁺) and nitrate (NO₃-) in black soils. Short-term effects of sulfur-coated urea (SCU) and polyurethane-coated urea (PCU), compared with conventional urea, on NO₃- and NH₄⁺ in black s...

Solution and suspension N sources have been developed as substitutes Cor urea in spray solutions used by lawn-care proCessionals. A field study was conducted to evaluate the response of Kentucky bluegrass (Poa prarensis L.) growing on a Catlin silt loam (Typic ArgiudoLl), to applications oC the nell' solution and suspension N sources, alone or combined with urea, by comparison to turC response ...

Rice (Oryza sativa L.) is the most important food crop not only in Asia but also entire world. Over past several decades, conventional fertilizer application for rice has caused loss of nutrients, which could lead to a series environmental problems such as eutrophication and greenhouse effects. The emergence slow controlled-release fertilizers provides new option more efficient fertilization ri...

due to importance of nitrogen on the agronomic traits of linseed oil, a factorial experiment was conducted in randomized complete block design with three replications at the field research station of faculty of agriculture at shahrekord university in 2012. five different treatments of fertilizer including urea, azomin, nitroxin, supernitroplus and control (without nitrogen) as the first factor ...

In order to evaluate the different growing media and nitrogen fertilizer (urea) on some morphological traits of Spathiphyllum plant, an experiment was carried out in split plot arrangement based on completely randomized design in three replications in greenhouse conditions in 2018. The main plot consisted of different growing media including T1: Leaf-mold, T2: Vermicompost and T3: A mi...

nitrogen use efficiency (nue) is usually lower in paddy rice (oryza sativa l.) than in upland crops. for this reason, any attempt to improve nue through the use of different nitrogen (n) carriers, different rice cultivars, properly timed n application, the use of ni-trification and urease inhibitorsis of prime interest. moreover, zinc (zn) next to n seems to be the most important soil factor af...

BACKGROUND The aim of this study was to evaluate the effects of nitroxin biofertilizer and chemical fertilizer on the growth, yield, and essential oil composition of dill. The experiment was conducted under field condition in randomized complete block design with three replications and two factors. RESULTS The first factor was the concentrations of nitroxin biofertilizer (0%, 50%, and 100%) o...

A field experiment was designed to study the effects of nitrogen (N) source and urease inhibitor N-(nbutyl) thiophosphoric triamide (NBPT) or nitrification inhibitor dicyandiamide (DCD) on nitrous oxide (N2O) emission and N use efficiency (NUE) in a sandy loam soil. Six treatments including no N fertilizer (control), N fertilizer urea alone (U), urea plus NBPT (NBPT), urea plus DCD (DCD), urea ...