نتایج جستجو برای: current soil p test methods such olsen
تعداد نتایج: 5069783 فیلتر نتایج به سال:
The application of compost or fertilizer at rates that exceed crop nutrient requirements can result in phosphorus (P) and nitrogen (N) accumulation in soil. This study was conducted to determine the influence of soil P and N contents on the concentrations and total amounts of P and N transported in runoff. Composted beef cattle feedlot manure or inorganic fertilizer were added from 1992 to 1995...
Phosphorus (P) can limit crop production in many soils, and soil testing is used to guide fertilizer recommendations. The Mehlich III (M3) soil test is widely used in North America, followed by colorimetric analysis for P, or by inductively coupled plasma-based spectrometry (ICP) for P and cations. However, differences have been observed in M3 P concentrations measured by these methods. Using 3...
Eroding stream and river banks can threaten agricultural assets, riparian infrastructure, and can significantly impact the environment. There are many different approaches to stabilizing and restoring stream and river banks. Streambank Soil Bioengineering is one of the approaches that are gaining favor for being both cost effective and environmentally sensitive. The term “Streambank Soil Bioeng...
wireless sensor networks (wsns) are one of the most interesting consequences of innovations in different areas of technology including wireless and mobile communications, networking, and sensor design. these networks are considered as a class of wireless networks which are constructed by a set of sensors. a large number of applications have been proposed for wsns. besides having numerous applic...
Abstract Nowadays, phosphorus natural reserves are being depleted, while P fertilizers demand is increasing. Phosphorus well contained in waste materials such as sewage sludge. Only a small amount (1–3%) of the soil total bioavailable for plant nutrition. More detail, present study focuses on determination kinetics concentrations sandy calcareous after application A centrifuged (C) and dried (D...
abstract the problems caused by the traditional system of criminal justice (which are based on remuneration and rehabilitation) such as, lack of attention to victim’s rights and position and society, underlie the emergence of restorative justice which had the victim-centered perspective, with respect to the role of the offender and participation of civil society. meanwhile, criminal mediation ...
Soil microbes provide important ecosystem services. Though the effects of changes in nutrient availability due to fertilization on the soil microbial communities in the topsoil (tilled layer, 0-20 cm) have been extensively explored, the effects on communities and their associations with soil nutrients in the subsoil (below 20 cm) which is rarely impacted by tillage are still unclear. 16S rRNA g...
22. M., Ninomiya, Y. & Olsen, H. K. (198%) J. Hiol. Chem. 263.2324-2329 Yada, T., Suzuki. S., Kobayashi, K., Kobayashi, M., Hoshino, T., Horie. K. & Kimata, K. (1000) J. Hiol. Chem. 265,6092-6990 Gordon. M. K., Gerecke, L). R. & Olsen, H. K. (1 987) I’roc. Natl. Acad. Sci. LISA. 84. 6040-6044 Llublet, H. & van der Rest, M. (1987) J. Hiol. Chem. 262. 1772417727 Dublet, H., Oh, S., Sugrue, S. I)....
current studies in second language (l2) learning have revealed the positive role of corrective feedback (cf) in both oral and written forms in different language features. the present study was an attempt to investigate the effect of both direct and indirect written corrective feedback (wcf) on the use of grammatical collocations in l2 writing. the study also sought to examine whether the effec...
BACKGROUND Bacillus thuringiensis is the most successful biological control agent, however, studies so far have shown that B. thuringiensis is very sensitive to environmental factors such as soil moisture and pH. Ultraviolet light from the sun had been considered as the main limiting factor for its persistence in soil and it has recently been shown that the antagonism exerted by other native so...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید