To date, few studies are conducted to quantify the effects of reduced ammonium (NH4+) and oxidized nitrate (NO3-) on soil CH4 uptake and N2O emission in the subtropical forests. In this study, NH4Cl and NaNO3 fertilizers were applied at three rates: 0, 40 and 120 kg N ha(-1) yr(-1). Soil CH4 and N2O fluxes were determined twice a week using the static chamber technique and gas chromatography. S...

Phosphorus (P) is a major macronutrient for plant health and development. The available form of P is generally low in the rhizosphere even in fertile soils. A major proportion of applied phosphate (Pi) fertilizers in the soil become fixed into insoluble, unavailable forms, which restricts crop production throughout the world. Roots possess two distinct modes of P uptake from the soil, direct an...

A recent trial found that the presence of coarse soil in fine soil increased nutrient uptake by two plant species (Smaill et al., 2014). To determine if the additional nutrient uptake was derived directly from the coarse soil, the changes in coarse soil nutrient stocks were assessed. In most cases nutrient stocks increased, despite being associated with greater plant nutrient uptake. This sugge...

cadmium is a heavy metal with a strong adverse effect on crop quality. moreover, it is a mobile element in environment and plants can easily uptake and transfer it to their organs. cadmium can easily enter human and animals food chains and threatens their health. to study the effects of a water soluble polymer and inoculation with mycorrhizal fungi on cadmium uptake of clover grown on contamina...

[1] Semiarid rangelands are a significant global sink for methane (CH4), but this sink strength may be altered by climate change. Methane uptake is sensitive to soil moisture showing a hump‐shaped relationship with a distinct optimum soil moisture level. Both CO2 and temperature affect soil moisture, but the direction of CH4 uptake response may depend on if the system is below or above the soil...

in a greenhouse experiment, changes in inorganic phosphorus fractions as well as their availability in the rhizosphere of rice (oryza sativa c.v. khazar) crop, following an application of 40 mg p (as monocalcium phosphate per kg of soil) were investigated in paddy soils north of iran. the study was performed as a 14×2 factorial in a completely randomized design of two factors namely: soil at 14...

During the years 2006 and 2007 the phytoextraction ability of maize (Zea mays), willow-tree (Salix smithiana) and poplar (Populus nigra × P. maximowiczii) to accumulate cadmium, copper, mercury and zinc was investigated. Small scale field experiment was carried out on soil contaminated with chemicals from the waste incineration plant in Hradec Kralové (Czech republic). Screening of this allotme...

fereidon nourgholipour1*, mohammad passandideh1 and emam gholi nourgholipour 2   [1] - soil and water research institute, tehran, iran   2- university of tehran, college of abureihan, tehran, iran         received: 21 december 2009 accepted: 25 february 201 1     * corresponding author: e-mail: [email protected]       abstract     expansion and economical importance of yield reduction due to iro...

Lennan, McLay and Crawford, Trans. Roy. Soc. Can., 22, III, 1928.) They did not determine the 1So(4dlO) level. The independent identifications made in the two laboratoties are in complete agreement. Paper by the authors will appear in the May number of the Physical Review. 5 A. G. Shenstone, Physic Rev., 29, 380, 1927; Laporte and Lang, Physic. Rev., 30, 378, 1927. 6 Gibbs and White, Physic. Re...