The preflood nitrogen (N) fertilizer sets the yield potential of the rice cultivars being grown and thus, its management is critical to obtaining profitable rice grain yields. The objectives of this study were to evaluate the ammonia volatilization loss and impact on rice yield when urea, Agrotain®, and ammonium sulfate were applied preflood and a flood established at 1, 5, and 10 days after N ...

Common to all experiments in mass spectrometry is the creation of gas-phase ions. Electron impact (EI) ionization is a familiar method for creating ions from volatile gas-phase molecules (M). In EI ionization, fast-moving electrons remove an electron from the neutral molecule to create the odd-electron molecular ion M`Õ. Another common ionization method is chemical ionization (CI). Here, an ion...

Safe incineration of harvested hyperaccumulators containing high content of heavy metals to avoid secondary environmental pollution is a problem for popularizing phytoremediation technology. The As volatilization behavior and its mechanism during incineration of Pteris vittata, an As-hyperaccumulator, was investigated. Incineration results reveal that 24% of total As accumulated by P. vittata (...

Ammonia volatilization is a major N loss process for surface-applied manures and urea fertilizers. The lost ammonia is important for both agricultural and non-agricultural ecosystems because it: i) is a direct loss of plant available N to the farmer, ii) reduces the N:P ratio in manure, which accelerates P build-up in soils, and iii) contributes to eutrophication in aquatic and low-N input ecos...

Polycyclic musks (PCMs) are synthetic fragrance compounds used in personal care products and household cleaners. Previous studies have indicated that PCMs are introduced to aquatic environments via wastewater and river discharge. Polyethylene passive samplers (PEs) were deployed in air and water during winter 2011 and summer 2012 to investigate the role of population centers as sources of these...

Ammonia volatilization from poultry litter often causes high levels of atmospheric ammonia in poultry houses, which is detrimental to both farm workers and birds. Ammonia emissions from houses also aggravate environmental problems, such as acid rain, and result in a loss of fertilizer nitrogen. The objectives of this study were to determine the effect of litter amendments on ammonia volatilizat...

For the ammonia generated in Korea, contribution rate of livestock manure is high, and a large amount (NH3) emitted into atmosphere during soil application process. Volatilization NH3 affected by characteristics as well characteristics, but current inventory does not sufficiently reflect this. This study was conducted to confirm change from liquid fertilizer (LF) due pH evaluate impacts biochar...

In 1971, an experiment was conducted in a field containing high amounts of residual DDT (dichlorodiphenyltrichloroethane) to evaluate deep plowing, followed by flooding, with and without organic matter applications, as soil and water management tools to reduce total DDT residues and preferentially degrade the residual DDT to DDD [l,l-dichloro-2,2-bis (p-chlorophenyl) ethane]. The experimental s...

As part of study the volatilization ruthenium behaviour in a boiling nitric solution, this paper presents results experiments dealing with influence different parameters (Ru and HNO3 concentrations, temperature, water addition) effect in-situ inhibitors to mitigate potential releases. The amount Ru volatilized from solution heated at 130 °C is about 2% initial inventory. addition low allowed pr...