in order to evaluate the effect of different nitrogen application methods on yield and yield components of winter wheat, a field experiment with split plot arrangement in randomized completely blocks design with four replicates was conducted during 2006-07. basal dressing in three levels (with no basal dressing, strip and distributing nitrogen fertilizer) as main plot and top dressing in six le...

in order to investigate the effects of nitrogen application rates and different planting beds on yield and yield components of garlic (allium sativum l.), a field experiment was conducted as split plot based on a randomized complete block design with four replications at the agricultural research station, azad university of torbat-e-jam, iran, during 2009-2010. three nitrogen application rates ...

A simple procedure for the estimation of plasmaamino nitrogen basedon the reaction of amino groupswith 2,4-dinitrofluorobenzene (DNFB) and subsequentmeasurement of the dinitrophenyl (DNP) amino derivatives at 420 m is presented. Elevated concentrations of bilirubin, hemoglobin, and the major nonprotein and nonamino acid nitrogen components of plasma do not seriously interfere. The proposed proc...

abstractbackground and objectives: all changes in the development stages of plants results in the change of one or more yield components and finally, the ultimate yield and manipulation of these periods means to create new possibilities for increasing yield. accordingly, planting date has a significant impact on plant growth and development during the growth season, so that any shift in plantin...

Volume 24 completes the presentation of methods applicable to the study of the biochemical and biophysical properties of photosynthetic and nitrogen fixing systems. The first part of this volume is concerned with the description of the physical and biochemical methods applicable to the identification of individual components of the photosynthetic system and the determination of their kinetic pa...

The nitrogen-fixing symbiosis between rhizobia and legume plants is a model of coevolved nutritional complementation. The plants reduce atmospheric CO(2) by photosynthesis and provide carbon compounds to symbiotically associated bacteria; the rhizobia use these compounds to reduce (fix) atmospheric N(2) to ammonia, a form of nitrogen the plants can use. A key feature of symbiotic N(2) fixation ...

Nitrogen-doped carbon nanotubes (CNx–NTs) were prepared using a floating catalyst chemical vapor deposition method. Melamine precursor was employed to effectively control nitrogen content within the CNx–NTs and modulate their structure. X-ray photoelectron spectroscopy (XPS) analysis of the nitrogen bonding demonstrates the nitrogen-incorporation profile according to the precursor amount, which...

this research was conducted to study the effects of water deficiency stress, nitrogen application rates, and plant population on water use efficiency and nitrogen of oily sunflower in 2007-2008 agriculture and research center of west-azerbaijan. the study was consisted split-split-plot experiments using randomized complete block design with 3 replications. the factor main was consisted irrigati...