Quantification of the Nitrogen (N)-supplying capacity of organic manures provides an important insight into more effective N management practices. The aims of this study were to determine the potential N mineralization of cow manure (CM), poultry manure (PM), urea fertilizer (UF) and the combined use of cow manure + urea fertilizer (CM + UF) for silage maize (Zea mays L.) in a calcareous so...

Anhydrous ammonia has higher concentrations of nitrogen (82% N) than urea (46% N), is usually more economical, has lower labour requirements for application and is less prone to volatilisation. It has also been shown that ammonia has nematicidal properties. It would be of great benefit to the sugar industry if anhydrous ammonia could be applied as both a fertiliser and as a nematicide for the s...

MO XF, FAN DB, QIN TF & CHU FX. 2015. Curing characteristics and adhesion performance of phenol–formaldehyde resins with composite additives. The curing characteristics of cure-accelerated phenol–formaldehyde resins with composite additives were investigated by differential scanning calorimetry analysis and gelation test. The pot lives and adhesion performances of phenol–formaldehyde resins wer...

review and goals: the ajowan(carum copticum) is a medicinal plants from apiaceae family that seeds contains 2-4% of volatile oil. 9-17 of chemical composition of ajowan essential oil have been reported(2), it have antibacterial and antioxidant activity of it caused to preserve the food materials(1). the application of chemical fertilizer leads to environmental pollution and ecological disaster ...

Nitrogen is one of the most important factor affecting maize (Zea mays L.) yield and income of smallholders under semiarid climates. Field experiments were conducted to investigate the impact of different N-fertilizer sources [urea, calcium ammonium nitrate (CAN), and ammonium sulfate (AS)] and rates (50, 100, 150, and 200 kg ha-1) on umber of rows ear-1 (NOR ear-1), number of seeds row-1 (NOS ...

in order to study the effect of density and time of urea foliar application on oil yield and essences percentage of black cumin (nigella sativa l.) a field experiment was conducted at research station of faculty of agriculture, azad university of birjand in 1387 growing season. three urea foliar application times [1-control 2-at 8-10 leaves stage 3-at 10% flowering 4-100% flowering ] and three ...

in order to evaluate the response of quantitative and qualitative characteristics of the isabgol (plantago ovata frosk.) medicinal plant to separate and combined application of urea and biofertilizer an experiment was conducted in a randomized complete block design at the research farm of shahrekord university in 2011. the experimental treatments consisted of control (no urea and biological fer...