scholarly journals Phosphorus Status, Inorganic Phosphorus Forms, and Other Physicochemical Properties of Acid Soils of Farta District, Northwestern Highlands of Ethiopia

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Asmare Melese ◽  
Heluf Gebrekidan ◽  
Markku Yli-Halla ◽  
Birru Yitaferu
Keyword(s):  
Crop Production ◽  
Chemical Properties ◽  
Acid Soils ◽  
Inorganic Phosphorus ◽  
Strong Positive Correlation ◽  
P Deficiency ◽  
Inorganic P ◽  
Olsen P ◽  
Degree Of P Saturation ◽  
P Content

Soil acidity and low availability of P limit crop production in the highlands of Ethiopia. The objective of this study was to determine the P status, distribution and forms of inorganic P and relate them to selected chemical properties of eight representative acidic surface soil samples from Farta District. Soil pH (H2O) varied between 4.74 and 5.50. The moderate to high CEC suggests that besides kaolinite, the soils also contain expandable 2 : 1 clay minerals. Though the total P content was high, the available Olsen P content was very low or low in all soils except one. In most soils, the abundance of inorganic P fractions was as follows: P bound by oxalate extractable iron (Feox-P)>reductant soluble Fe-P>occluded Al-Fe-P>P bound by oxalate extractable aluminum (Alox-P)>calcium bound P (Ca-P). Olsen P had a very strong positive correlation (P≤0.01) withAlox-P (r=0.98),Feox-P (r=0.96), and oxalate extractable P (r=0.94). Though Fe bound P reserves were quite abundant and the degree of P saturation ofAlox+Feox(median 3.3%) was moderate, the extremely low P saturation ofAlox(median 0.5%) explains the P deficiency of the soils.

Relationship between phosphorus fractions and properties of highly calcareous soils

Soil Research ◽  
2007 ◽  
Vol 45 (4) ◽  
pp. 255 ◽  
Author(s):  
Ebrahim Adhami ◽  
Hamid Reza Memarian ◽  
Farzad Rassaei ◽  
Ehsan Mahdavi ◽  
Manouchehr Maftoun ◽  
...  
Keyword(s):  
Calcareous Soils ◽  
Hydroxylamine Hydrochloride ◽  
Inorganic Phosphorus ◽  
Influential Factor ◽  
Sequential Fractionation ◽  
Inorganic P ◽  
Soil P ◽  
Fractionation Procedure ◽  
Extractable P ◽  
P Content

Inorganic phosphorus (P) sequential fractionation schemes are applicable techniques to interpret soil P status. The present study was initiated to determine the origin of various P fractions in highly calcareous soils. Inorganic P forms were determined by a sequential fractionation procedure extracting with NaOH (NaOH-P), Na citrate-bicarbonate (CB-P), Na citrate 2 times (C1-P and C2-P), Na citrate-ascorbate (CAs-P), Na citrate-bicarbonate-dithionite (CBD-P), Na acetate (NaAc-P), and HCl (HCl-P). Results showed that NaOH-P was negatively correlated with active iron oxides. CB-P was positively correlated with silt content and negatively related to citrate-bicarbonate-dithionite extractable Fe (Fed). This result illustrates the weathering effect on Ca-P, with Ca-P content declining as a consequence of weathering. A negative correlation was observed between C1-P and citrate ascorbate extractable Fe (FeCAs). Second citrate extractable P (C2-P) was negatively related to calcium carbonate equivalent and positively related to hydroxylamine-hydrochloride and neutral ammonium acetate-hydroquinone extractable Mn (Mnh and Mnq). Fine silt (Fsilt) was the most influential factor affecting CAs-P. It seemed citrate-dithionite-bicarbonate extractable Al (Ald), Mnh, and Mnq have been sinks for CBD-P, while free iron oxide compounds (Feo, Fec, and FeCAs) were a major contributing factor for the formation of NaAc-P. Stable P compounds (HCl-P) of highly calcareous soils originated from coarse silt (Csilt) and hydroxylamine-hydrochloride extractable Mn (Mnh).

scholarly journals Effects of Liming on Dithionate and Oxalate Extractable Aluminium in Acid Soils

2020 ◽  
pp. 1-9
Author(s):  
Esther Mwende Muindi
Keyword(s):  
Crop Production ◽  
Block Design ◽  
Chemical Properties ◽  
Acid Soils ◽  
P Availability ◽  
Acidic Soils ◽  
Training Centre ◽  
Wide Range ◽  
World Information ◽  
Considerable Work

Liming and phosphorus (P) applications are recommended practices for improving crop production in acid soils of the tropics. Although considerable work has been done to establish liming rates for acid soils in many parts of the world, information on the effects of lime on the forms of aluminium which actively sorb P in such soils is minimal. A greenhouse pot experiment was conducted at Waruhiu Farmers Training Centre, Githunguri to evaluate the effect of liming on oxalate and dithionate extractable aluminium in acid soils. Extremely (pH 4.48) and strongly (pH 4.59) acidic soils were evaluated. Four liming (CaO) rates namely 0, 2.2, 5.2 and 7.4 tonnes ha-1 for extremely acidic and 0, 1.4, 3.2, and 4.5 tonnes ha-1 for  strongly acidic soils were evaluated. The experiment was laid out in a Randomized Complete Block Design (RCBD) and replicated three times. Data collected included: initial soil chemical properties, oxalate (Alo) and dithionate (Ald) aluminium levels. The tested soils had high exchangeable Al (> 2 cmol Al kg-1), Al saturation of (> 20% Al) and low extractable P values (< 15 mg P kg-1 soil). Liming significantly (p=.05) reduced Alo by 70% and 68% in extremely and strongly acidic soils respectively and Ald by 78% in both extremely and strongly acidic soils compared to control. Use of 7.4 tonnes ha-1 of lime in extremely acidic soils and 4.5 tonnes ha-1 of lime in strongly acidic soils significantly (p=.05) reduced both Alo and Ald by > 68% compared to no lime. It was, therefore, concluded that liming contributes to the reduction of soluble Alo and Ald in acid soils of the Kenya highlands leading to increased soluble P availability. Studies are required to provide short and long term optimal liming rates that reduce Alo and Ald without distabilizing availability of other nutrients in field conditions under wide range of acid soils.

INORGANIC PHOSPHORUS FORMS IN SOME ALBERTA SOILS AS RELATED TO SOIL DEVELOPMENT, PARENT MATERIAL AND AVAILABLE PHOSPHORUS

1968 ◽  
Vol 48 (3) ◽  
pp. 289-295 ◽  
Author(s):  
T. G. Alexander ◽  
J. A. Robertson
Keyword(s):  
Inorganic Phosphorus ◽  
Soil Development ◽  
Parent Material ◽  
Available P ◽  
Available Phosphorus ◽  
Inorganic P ◽  
Podzolic Soils ◽  
Phosphorus Forms ◽  
P Content ◽  
Close Relationship

Inorganic P forms in 18 profiles representing five great groups of Alberta soils were determined by the modified Chang and Jackson procedure. Ca-P is dominant in the Chernozemic Brown and Black soils and in the C horizons containing CaCO3, while Fe-P and Al-P or Occl-P are the main forms in the Podzolic soils. Three series high in available P contain appreciable amounts of Al-P and Fe-P in their surface horizons. The organic P content is relatively high in the soils exhibiting the least pedogenic development.With increasing degree of soil development, Fe-P and Occl-P tend to increase. However, parent materials have a marked influence on the distribution of inorganic P forms and a close relationship between soil development and distribution of inorganic P forms does not appear to exist in these soils. The Al-P and Fe-P forms seem to be the major sources of available P in the soils studied.

Dietary calcium and phosphorus repletion of lambs

1990 ◽  
Vol 41 (2) ◽  
pp. 413 ◽  
Author(s):  
JH Ternouth ◽  
CC Sevilla
Keyword(s):  
Gastrointestinal Tract ◽  
Bone Resorption ◽  
Strong Correlations ◽  
P Deficiency ◽  
Inorganic P ◽  
Metatarsal Bones ◽  
P Content ◽  
Calcium And Phosphorus ◽  
Kinetics Of ◽  
Exchangeable P

Three-month-old Corridale lambs, confined in metabolism crates, were repleted with calcium or phosphorus or both Ca and P for 6 weeks (repletion diets HL, LH, HH, respectively, Ca 5.0 and P 3.7 g/kg) after being offered a low Ca and P (Ca 1.25 and P 0.66 g/kg) roughage-based diet (LL) for 12 weeks. At the end of the experiment, the Ca and P kinetics of the lambs was studied using a combination of balance studies and isotope techniques. The depletion diet substantially reduced the plasma P concentrations, DM intake and digestibility, liveweight gain, and Ca and P content of the bones. During repletion, lambs fed on the HL, LH and HH diets consumed minus16, 28 and 46% more DM than the lambs on the LL diet. The liveweight gains were 15.5, minus17.8, 41.1 and 134.5 g/day for lambs given diets LL, HL, LH and HH, respectively, during the repletion period. During the 6-week repletion period, there was complete remineralization of the rib bones of lambs fed on diet HH, but only partial remineralization of the metatarsal bones. The results indicated the need to feed supplementary Ca as well as P during dietary mineral repletion. The DM digestibilities of the lambs fed on the LL depletion diet did not improve during repletion. There were strong correlations between DM intake and plasma inorganic P, muscle P or exchangeable P pool, but not DM digestibility, suggesting that the reductions in feed intake with P deficiency are due to some effect on intermediary metabolism of the animal rather than on the gastrointestinal tract. When the lambs were repleted with diet HL, they had the highest Ca absorption coefficient, level of exchangeable body Ca, bone accretion of Ca and bone resorption of Ca. The LH repletion diet lambs had the highest rate and coefficient of absorption of P, but HH lambs had the highest levels of exchangeable body P, and rates of accretion and resorption of soft tissue and osseous P.

scholarly journals Effects of 29-year long-term fertilizer management on soil phosphorus in double-crop rice system

2018 ◽  
Vol 64 (No. 5) ◽  
pp. 221-226
Author(s):  
Lv Zhenzhen ◽  
Liu Xiumei ◽  
Hou Hongqian ◽  
Liu Yiren ◽  
Ji Jianhua ◽  
...  
Keyword(s):  
Crop Production ◽  
Soil Phosphorus ◽  
Critical Values ◽  
Jiangxi Province ◽  
Olsen P ◽  
P Content ◽  
P Balance ◽  
Using Data ◽  
Late Rice

Rational soil phosphorus (P) management is significant to crop production and environment protection. Little information is available on soil Olsen-P balance and critical values in double-crop rice in China. The main aim of the study was to relate soil Olsen-P to apparent P balance and to determine Olsen-P critical value for early and late rice using data from a 29-year study (1984~2012) at the Jiangxi province. The results showed that Olsen-P decreased by 0.12~0.26 mg/kg/year without P addition and increased by 0.56~2.52 mg/kg/year with P fertilization. Olsen-P decreased by 0.30 mg/kg for CK and NK under an average deficit of 100 kg P/ha, and increased by an average of 9.10 mg/kg in treatments with organic manures and were 4.55 times higher than chemical fertilizers with 100 kg/ha of P surplus. The critical values for early and late rice were 22.70 and 22.67 mg/kg, respectively. The average  Olsen-P content is 90.89 mg/kg after 29-year application of chemical fertilizer and manures. Therefore, decreasing the amount of total P input and increasing the compost portion should be recommended to improve food production and protect environment in red paddy soils in south China.  

scholarly journals Improving Phosphorus Availability in an Acid Soil Using Organic Amendments Produced from Agroindustrial Wastes

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Huck Ywih Ch’ng ◽  
Osumanu Haruna Ahmed ◽  
Nik Muhamad Ab. Majid
Keyword(s):  
Organic Phosphorus ◽  
Acid Soil ◽  
Organic Amendments ◽  
Chemical Properties ◽  
Acid Soils ◽  
Inorganic Phosphorus ◽  
Phosphorus Availability ◽  
Available Phosphorus ◽  
Exchangeable Acidity ◽  
Chicken Litter

In acid soils, soluble inorganic phosphorus is fixed by aluminium and iron. To overcome this problem, acid soils are limed to fix aluminium and iron but this practice is not economical. The practice is also not environmentally friendly. This study was conducted to improve phosphorus availability using organic amendments (biochar and compost produced from chicken litter and pineapple leaves, resp.) to fix aluminium and iron instead of phosphorus. Amending soil with biochar or compost or a mixture of biochar and compost increased total phosphorus, available phosphorus, inorganic phosphorus fractions (soluble inorganic phosphorus, aluminium bound inorganic phosphorus, iron bound inorganic phosphorus, redundant soluble inorganic phosphorus, and calcium bound phosphorus), and organic phosphorus. This was possible because the organic amendments increased soil pH and reduced exchangeable acidity, exchangeable aluminium, and exchangeable iron. The findings suggest that the organic amendments altered soil chemical properties in a way that enhanced the availability of phosphorus in this study. The amendments effectively fixed aluminium and iron instead of phosphorus, thus rendering phosphorus available by keeping the inorganic phosphorus in a bioavailable labile phosphorus pool for a longer period compared with application of Triple Superphosphate without organic amendments.

scholarly journals Effects of Lime, Vermicompost, and Chemical P Fertilizer on Selected Properties of Acid Soils of Ebantu District, Western Highlands of Ethiopia

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Abdissa Bekele ◽  
Kibebew Kibret ◽  
Bobe Bedadi ◽  
Markku Yli-Halla ◽  
Tesfaye Balemi
Keyword(s):  
Crop Production ◽  
Soil Acidity ◽  
Chemical Properties ◽  
Acid Soils ◽  
Exchangeable Acidity ◽  
Combined Application ◽  
Randomized Design ◽  
Exchangeable Ca ◽  
P Fertilizer ◽  
Major Factors

Soil acidity is one of the major factors limiting soil fertility and crop production in large areas of Ethiopia. A two-month incubation experiment was conducted to evaluate the effects of lime, vermicompost (VC), and chemical phosphorus (P) fertilizer on selected chemical properties of Dystric Nitisols in Ebantu District, Western Ethiopia. The treatments comprised of three rates of lime (2, 4, and 6 tons CaCO3·ha−1), VC (2.5, 5, and 7.5 tons·ha−1), and mineral P fertilizer (20, 40, and 60 kg·P·ha−1) each applied alone and in various combinations. The experiment was laid down in a completely randomized design with two replications. The results showed that the highest increment of pH from 4.83 at the control to 6.05 and reduction of exchangeable Al from 1.70 to 0.09 cmolc·kg−1 were obtained from combined application of lime at 4 tons CaCO3·ha−1 and VC at 7.5 tons·ha−1. The most significant decrease in exchangeable acidity (0.17 cmolc.kg-1) was observed in soil that was treated with 6 tons CaCO3·ha−1 lime applied alone (93%) and combined application of lime at 4 tons CaCO3·ha−1 with VC at 7.5 tons·ha−1 by (81%). The highest contents of OM (4.1%) and total nitrogen (0.29%) were obtained from combined application of lime at 4 tons CaCO3·ha−1 and VC at 7.5 tons·ha−1. Integrated application of chemical P (60 kg·P·ha−1) with lime (2 tons·ha−1) plus VC (7.5 tons·ha−1) resulted in Bray-II P increased by 45% relative to control. The various combinations of the treatments also improved exchangeable Ca2+ and Mg2+. The results indicate that integrated use of lime, vermicompost, and chemical P fertilizer can improve soil acidity and availability of nutrients. However, the real potential of the amendments used in this experiment should be further assessed under field conditions using a test crop.

scholarly journals Physico-chemical properties of acid soils from Madhupur Tract and Northern & Eastern Piedmont Plains of Bangladesh

2021 ◽  
Vol 7 (1) ◽  
pp. 12-20
Author(s):  
Asif Ahmed Ratul ◽  
Tahsina Sharmin Hoque ◽  
Md Rafiqul Islam ◽  
Md Anamul Hoque
Keyword(s):  
Soil Ph ◽  
Crop Production ◽  
Sandy Loam ◽  
Chemical Properties ◽  
Acid Soils ◽  
Soil Samples ◽  
Soil Reaction ◽  
Total N ◽  
Organic C ◽  
Physico Chemical

Soil reaction is an important issue that adversely affects soil fertility and crop productivity. Twenty five representative soil samples from farmers’ fields of Ramchandrakura, Bishgiripar, Andharupara and Nayabil villages of Nalitabari upazila under Sherpur district (AEZ 22-Northern and Eastern Piedmont Plains) and twenty soil samples from farmers’ fields of Bakta, Nishchintopur, Boril and Kaladaho villages of Fulbaria upazila under Mymensingh district (AEZ 28-Madhupur Tract) were collected and analyzed to study the physico-chemical properties of acid soils. Among 45 samples, 13 were sandy loam, 17 were silt loam, 10 were loam, 2 were clay loam and 3 were loamy sand in texture. Soil pH was very strongly acidic to strongly acidic. The soil pH of AEZ 22 varied from 3.81 to 4.78 and that of AEZ 28 varied from 3.96 to 5.11. The organic C of Nalitabari soil varied from 0.50 to 1.35% and that of Fulbaria soils ranged from 0.50 to 1.27% showing low to medium status. The status of nutrient elements viz. N, P, K and S in most of the samples was very low or very low to medium. Total N contents of AEZ 22 varied from 0.06 to 0.14% and that of AEZ 28 varied from 0.07 to 0.16%. Available P in soils of AEZ 22 varied from 3.25 to 26.45 ppm and that in soils of AEZ 28 ranged from 2.45 to 16.62 ppm. Exchangeable K in AEZ 22 soils varied from 15.13 to 92.41 ppm and that in AEZ 28 soils varied from 16.09 to 98.41 ppm. Available S in AEZ 22 soils varied from 1.68 to 33.70 ppm and that in AEZ 28 soils from 3.95 to 27.52 ppm. Therefore, these acid soils should be amended with liming materials and fertilized with inorganic fertilizers and organic manures for successful crop production. Asian J. Med. Biol. Res. March 2021, 7(1): 12-20

scholarly journals Boron availability in relation to some important soil chemical properties in acid soils of Cooch Behar district, West Bengal

2017 ◽  
Vol 9 (4) ◽  
pp. 2400-2403
Author(s):  
Dipa Kundu ◽  
Rubina Khanam ◽  
Sushanta Saha ◽  
Umalaxmi Thingujam ◽  
G. C. Hazra
Keyword(s):  
Organic Carbon ◽  
Global Positioning System ◽  
Crop Production ◽  
West Bengal ◽  
Chemical Properties ◽  
Acid Soils ◽  
Mean Value ◽  
Soil Samples ◽  
Organic Carbon Content ◽  
Global Positioning

In the present study, we investigated the distribution of soil available boron and its relationship with some soil properties in the samples collected from different locations in acidic alluvial soils of Cooch Behar district in West Bengal during 2013-2014. For the study about two hundred fifty (250) georeferenced surface soil samples covering 11 blocks of the districts were collected with the help of a global positioning system (GPS). The soil results revealed that pH of the analyzed samples varied from 4.91-7.28 (mean value 5.68) which indicated that soils of the district were in the acidic to slightly acidic in reaction. Organic carbon content of the soils varied from 0.42 to 1.62 % with a mean value of 0.96 % and about 93.7 % of the samples were high whereas about 5.2 and 1.2 % of the samples analyzed were in medium and low category, respectively. Results also indicated that the available B content in the soils of the districts ranged from 0.04 to 3.87 mg kg-1 with a mean value of 0.51 mg kg-1 and about 38.26 % soil samples were classified under low, whereas, 3.58 and 0.35 % samples were categorized as medium and high in available B content. It was further indicated that the content of available B in soil was positively correlated with organic carbon (r = 0.170**) and negatively correlated with pH (r = -0.021). Organic carbon status was also found to be positively and non significantly correlated with soil pH (r = 0.062). The results of the study would be immensely helpful for the extension workers to recommended B application considering pH and organic carbon status in acidic soils of the district for a profitable crop production.

SCREENING OF SESBANIA FOR TOLERANCE TO ALUMINUM TOXICITY AND SYMBIOTIC EFFECTIVENESS WITH ACID TOLERANT RHIZOBIA STRAINS IN ACID SOIL IN WESTERN KENYA

2009 ◽  
Vol 45 (4) ◽  
pp. 417-427 ◽  
Author(s):  
S. O. GUDU ◽  
P. O. KISINYO ◽  
E. T. MAKATIANI ◽  
D. W ODEE ◽  
J. F. O. ESEGU ◽  
...  
Keyword(s):  
Acid Soil ◽  
Acid Soils ◽  
Al Toxicity ◽  
Symbiotic Effectiveness ◽  
N Content ◽  
P Deficiency ◽  
P Use Efficiency ◽  
P Content ◽  
Acid Tolerant ◽  
Use Efficiency

SUMMARYNitrogen fixation by leguminous trees such as sesbania (Sesbania sesban) in acid soils is limited by aluminium (Al) toxicity and phosphorus (P) deficiency. We screened 214 East African sesbania accessions for Al toxicity tolerance, P use efficiency and sesbania–rhizobia symbiosis. Aluminium toxicity tolerance or sensitivity was measured by the relative root elongation index. Highly Al tolerant and sensitive accessions were screened for P use efficiency. Highly P use efficient and Al sensitive accessions were assessed for symbiotic effectiveness with acid tolerant rhizobia. Eighty-eight per cent of the accessions were Al toxicity tolerant. High Al levels reduced shoot P content by 88% and total dry matter (TDM) by 83%. P addition increased shoot P content and TDM. Rhizobia inoculation increased nodulation by 28–82%, shoot N content by 28–45% and TDM by 15–34% in the low rhizobia density acid soil of Bumala, Kenya. P use efficient accessions had higher nodulation, shoot N content and TDM in the ranges 32–70, 20–52 and 22–36%, respectively, compared to sensitive genotypes. The combination of sesbania accession (SSUG10) and rhizobia strain ASs48 was superior in shoot N accumulation. Inoculation of P use efficient germplasm with acid tolerant rhizobia can improve N-rich biomass accumulation suitable for N replenishment in acid soils.

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