نتایج جستجو برای: calcareous soils available p

تعداد نتایج: 1821621  

2001
Meifang Zhou Yuncong Li

in calcareous soils of the southern Everglades and of adjacent areas is needed urgently. The understanding of P sorption and desorption by soils is imporThe relationships between P-sorption capacity, P tant for safeguarding water quality and for fertilizer management. availability and soil components in calcareous soils have Little is known about the P-sorption characteristics of the calcareous...

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ژورنال: علوم آب و خاک 2009
اوستان, شاهین, حسین پور, علیرضا, خورشید, مهدیه,

Organic manures can affect phosphorus (P) sorption characteristics (PSC) and its availability in soils. Information about effect of sewage sludge (SL) on PSC in calcareous soils of Hamadan province is limited. The objective of this research was to study the effect of SL on PSC and available P in 10 calcareous soils. The soil samples were incubated with and without 1.5 % SL for 5 months at field...

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ژورنال: تولید محصولات زراعی و باغی 2007
امیر فتوت, , غلامحسین حق‌نیا, , اکرم حلاج‌نیا, , رضا خراسانی, ,

Study of phosphorus reactions over time and the role of organic matter in the calcareous soils are important for the development of P fertilizer and manure management practices. The objective of this study was to determine the effect of applied manure on P availability and its chemical forms in the soil, over time. Eight samples were collected from semi-arid calcareous soils of Mashhad plain. T...

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ژورنال: تولید محصولات زراعی و باغی 2009
اوستان, شاهین, حسین پور, علیرضا, خورشید, مهدیه,

Organic manures can affect phosphorus (P) sorption characteristics (PSC) and its availability in soils. Information about effect of sewage sludge (SL) on PSC in calcareous soils of Hamadan province is limited. The objective of this research was to study the effect of SL on PSC and available P in 10 calcareous soils. The soil samples were incubated with and without 1.5 % SL for 5 months at field...

متن کامل
ژورنال: علوم آب و خاک 2007
امیر فتوت, , غلامحسین حق‌نیا, , اکرم حلاج‌نیا, , رضا خراسانی, ,

Study of phosphorus reactions over time and the role of organic matter in the calcareous soils are important for the development of P fertilizer and manure management practices. The objective of this study was to determine the effect of applied manure on P availability and its chemical forms in the soil, over time. Eight samples were collected from semi-arid calcareous soils of Mashhad plain. T...

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Journal: :Journal of environmental quality 2012
R D Lentz J A Ippolito

Carbon-rich biochar derived from the pyrolysis of biomass can sequester atmospheric CO, mitigate climate change, and potentially increase crop productivity. However, research is needed to confirm the suitability and sustainability of biochar application to different soils. To an irrigated calcareous soil, we applied stockpiled dairy manure (42 Mg ha dry wt) and hardwood-derived biochar (22.4 Mg...

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ژورنال: علوم و فنون کشت های گلخانه ای 2013
حسین‌پور, علیرضا , رئیسی, فایز , متقیان, حمیدرضا, محمدی, جهانگرد ,

Copper (Cu) is an essential micronutrient for plants. However, determination of a suitable extractant of Cu in sewage sludge-amended calcareous soils has seldom been attended. The aim of this research was evaluating several extractants to predict available Cu in 10 untreated and sewage sludge-treated calcareous soils in greenhouse under wheat cultivation. After 1 month incubation, available Cu ...

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Journal: :journal of agricultural science and technology 2010
a. samadi

phosphorus (p) sorption in soils is a key process governing its availability to crops. there has been scanty information available on the p sorption characteristics of calcare-ous soils of western azarbaijan province, iran. in this study, p sorption characteristics and their relationship to soil properties were determined in 36 soil samples belonging to 15 agricultural soil series located in th...

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Journal: Iran Agricultural Research 2015
Adel Reyhanitabar, Mohammad Maghsoodi, Nosratolla Najafi,

In this research, several chemical extractants and modified Olsen methods were studied in 25 surface-calcareous soils (0-30 cm) for determining available phosphorus (P) for corn (Zea mays L.) plant. In this experiment, the highest correlation was obtained between extracted P by Olsen and Colwell methods (NaHCO3-extractable P) and dry weight of corn shoot (r =0.67 and 0.75, p

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Journal: Iran Agricultural Research 2011
A. RONAGHI N. KARIMIAN S. SAFARZADEH

Cadmium (Cd) concentration in soil solution and its bioavailability is controlled by sorption-desorption reactions. The objective of this research was to compare Cd adsorption behavior in six calcareous and four acid soils. Soil samples were equilibrated with 0.01 M Ca(NO3)2 containing 25 to 3200 mg Cd L−1. Results showed that the tendency for adsorption was high at low Cd concentrations (0-400...

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