scholarly journals Evaluating phosphorus loading from repeated manure applications to two Saskatchewansoils

2008 ◽  
Vol 88 (3) ◽  
pp. 377-387 ◽  
Author(s):  
C. Stumborg ◽  
J J Schoenau
Keyword(s):  
Plant Root ◽  
Measurement Techniques ◽  
Cattle Manure ◽  
Phosphorus Loading ◽  
Manure Application ◽  
Soil P ◽  
Labile P ◽  
N Rates ◽  
The Impact ◽  
Annual Application

An understanding of the impact of repeated manure additions on soil phosphorus (P) is needed to determine appropriate manure application rates for prairie soils and manure sources. The objective of this study was to assess the loading of manure-derived phosphorus using P budgets and soil P measurement techniques applied to two Saskatchewan soils with known histories of manure application. Liquid hog manure (LHM) and solid cattle manure (SCM) treatments were applied annually over 8 yr to Black Chernozemic soils (Dixon site), and LHM was applied to Dark Brown Chernozemic soils (Plenty site) over 6 yr. Soil samples were collected in the spring of 2003 and 2004 and analyzed for labile P (Modified Kelowna extractable, Olsen extractable, water extractable, and Plant Root Simulator exchange resin methods) and total P. The P budgets were in good agreement with the observed patterns in labile soil P at the two sites. The annual application of LHM (37000 L ha-1 yr-1) at agronomic nitrogen (N) rates with no additional P fertilizer (Dixon only) did not significantly elevate soil labile P compared with the unfertilized controls at both Dixon and Plenty. The annual application of SCM (7.6 Mg ha-1 yr-1) at agronomic N rates did not significantly elevate soil labile P compared with the unfertilized control at Dixon; whereas of SCM at higher rates (15.2 Mg ha-1 yr-1 and 30.4 Mg ha-1 yr-1) showed some elevation in labile soil P. Measures of labile P were sensitive to P surpluses or deficits predicted by P balances, and all methods of measuring labile soil P were strongly correlated with one another at both sites (r ≥ 0.803 at P ≤ 0.01). Key words: Manure, cattle manure, nitrogen, phosphorus, soil test phosphorus

Long-term effects of fertilizers and manure application on the forms and availability of soil phosphorus

1995 ◽  
Vol 75 (3) ◽  
pp. 281-285 ◽  
Author(s):  
Thi Sen Tran ◽  
Adrien N’dayegamiye
Keyword(s):  
Soil Phosphorus ◽  
Fertilizer Application ◽  
P Uptake ◽  
Cattle Manure ◽  
Organic P ◽  
Manure Application ◽  
Soil P ◽  
P Fertilizer ◽  
Labile P

Long-term application of cattle manure and fertilizer can affect the forms and availability of soil phosphorus. This cumulative effect was evaluated on Le Bras silt loam (Humic Gleysol) cultivated with silage corn (Zea mays L.). In this long-term trial, treatments were arranged in a split-plot design, with dairy cattle manure applied at 0 and 20 Mg ha−1 as the main factor. The subplots consisted of six fertilizer treatments (NK, PK, NP, NPK, NPKMg and the unfertilized check). Fertilizer rates for silage corn were 150, 100, 150 and 40 kg ha−1 N, P205, K20 and Mg, respectively. The N fertilizer rate was reduced to 100 kg N ha−1 in manured plots. Soil inorganic P (Pi) and organic P (Po) fractions were sequentially extracted by resin, NaHCO3, NaOH, HCl and a final H2SO4 wet digestion of the residue. On average, labile P extracted by resin and NaHCO3 represented 17% of the total P (Pt); moderately labile NaOH-Pi and Po more than 40%; and stable P 36%. Application of manure and fertilizers increased significantly resin-, NaHCO3-, NaOH-Pi and Pt. However, NaOH-Po was decreased by P fertilizer application in NPK and NPKMg treatments, while long-term manure application maintained this Po pool in the soil. Stable P fractions were not affected by fertilization or by manuring. In all 6 yr of the study, P uptake by silage corn was significantly increased both by long-term N and P fertilizer application and also by manure incorporation. Phosphorus uptake by corn was highly related to all labile and moderately labile Pi fractions and Pt. Long-term application of dairy manure at a rate of 20 t ha−1 increased soil Pi forms and maintained Po fractions. Key words: Inorganic labile P, organic P, soil-P fractionation, P uptake, silage corn

Copper and zinc amounts and distribution in soil as influenced by application of animal manure in east-central Saskatchewan

2003 ◽  
Vol 83 (2) ◽  
pp. 197-202 ◽  
Author(s):  
P. Qian ◽  
J. J. Schoenau ◽  
T. Wu ◽  
S. P. Mooleki
Keyword(s):  
Swine Manure ◽  
Field Research ◽  
Cattle Manure ◽  
Field Crop ◽  
Manure Application ◽  
Total N ◽  
Animal Manures ◽  
Liquid Swine Manure ◽  
Cu And Zn ◽  
Annual Application

Increasing use of animal manures in Saskatchewan requires information on the fate and distribution of residual manure Cu and Zn in Saskatchewan soils. To address this issue, the amounts of soil Cu and Zn in various inorganic and organic fractions were investigated in a field crop research plot (Cudworth Association soil) with a 5-yr history of annual application of liquid swine manure and solid cattle manure, and in two grassland field research plots (Meota and Oxbow Association soils) that had received annual application of liquid swine manure for 3 yr. The annual rates of manure application were based on N contents in the manures, and were equivalent to approximately 0, 100, 200 and 400 kg total N ha-1 yr-1 in the field crop plots, and 0 and 100 kg total N ha-1 yr-1 in grassland plots. In both the field crop and grassland manured plots there were no substantial increases in total Cu an d Zn in soils associated with manure application. Some increases in the moderately labile Cu and Zn fractions were observed in treatments with large amounts of animal manures applied every year. The liquid swine manure had less effect than cattle manure on increasing labile Cu and Zn fractions. These results indicate that annual addition of animal manures at rates of approximately 100 kg N ha-1 for 3 to 5 yr does not constitute an environmental risk from Cu and Zn loading in these soils. Key words: Cu fraction, Zn fraction, sequential Cu extraction, sequential Zn extraction, urea, swine manure, cattle manure

Phosphorus amounts and distribution in a Saskatchewan soil after five years of swine and cattle manure application

2004 ◽  
Vol 84 (3) ◽  
pp. 275-281 ◽  
Author(s):  
P. Qian ◽  
J. J. Schoenau ◽  
T. Wu ◽  
P. Mooleki
Keyword(s):  
Swine Manure ◽  
Cattle Manure ◽  
Lower Amount ◽  
P Fractions ◽  
Manure Application ◽  
Total N ◽  
Manure Treatment ◽  
Liquid Swine Manure ◽  
Labile P ◽  
Total P

Repeated application of animal manures to Saskatchewan soils has led to interest in the fate and distribution of residual manure P in the soil. The concentrations of soil phosphorus in various inorganic and organic fractions were investigated in soils sampled from long-term field research plots (Dixon, SK) with a 5-yr history of annual application of liquid swine manure or solid cattle manure at low, medium and high rates. The soil type at the research site is a loamy textured Black Chernozem (Cudworth Association). Annual rates of manure application over the 5 yr were based on the N contents in the manures and were equivalent to 0 (control), and approximately 100 (low), 200 (medium) and 400 (high) kg total N ha-1 yr-1 as manure. For comparison, urea alone was also applied at rates of 50, 100 and 200 kg N ha-1 yr-1. The total P concentration in the surface soil (0&ndash15 cm) was significantly increased only by the addition of cattle manure and only in the medium and high rate treatments compared to the control. The most labile P fractions (Resin-P and NaHCO3-P) were also significantly increased with increasing rate of cattle manure addition. No significant increases in either soil total P or labile P fractions were observed in liquid swine manure treatments, which is attributed to the lower amount of P added with the swine manure treatment than the cattle manure treatment. Added P in the swine manure treatment more closely matched P removal in crop harvest compared to cattle manure treatment, which had more P added than was removed by the crop. Key words: Phosphorus fractions, labile P fraction, sequential P extraction, urea, swine manure, cattle manure

scholarly journals Soil phosphorus fractions in sandy soils amended with cattle manure for long periods

2009 ◽  
Vol 33 (3) ◽  
pp. 613-622 ◽  
Author(s):  
Sandra Regina da Silva Galvão ◽  
Ignacio Hernan Salcedo
Keyword(s):  
Soil Phosphorus ◽  
Mean Value ◽  
Average Concentration ◽  
Soil Samples ◽  
Phosphorus Fractions ◽  
Cattle Manure ◽  
Organic P ◽  
Soil P ◽  
Labile P ◽  
Semi Arid Region

Phosphorus fractions were determined in soil samples from areas fertilized or not with farmyard cattle manure (FYM) and in samples of FYM used in the semi-arid region of Paraiba state, Brazil. Soil samples were taken from the 0-20; 20-40 and 40-60 cm layers of 18 cultivated areas, which, according to interviews with farmers, had been treated with 12 to 20 t ha-1 FYM annually, for the past 2 to 40 years. Soil samples were also collected from four unfertilized pasture areas as controls. Phosphorus in the soil samples was sequentially extracted with water (Pw), resin (Pres), NaHCO3 (Pi bic and Po bic), NaOH (Pi hid and Po hid), H2SO4 (Pacid) and, finally, by digestion with H2SO4/H2O2 (Presd). Nine FYM samples were extracted with water, resin, Mehlich-1, H2SO4, NaOH or digestion with H2SO4/H2O2, not sequentially, and the extracts analyzed for P. The sampled areas had homogeneous, sandy and P-deficient soils; increases in total soil P (Pt) above the mean value of the control areas (up to 274 mg kg-1 in the 0-20 cm layer of the most P-enriched samples) were therefore attributed to FYM applications, which was the only external P input in the region. Regression analysis was used to study the relationship between soil P fractions and Pt. The Pacid fraction, related to Ca-P forms, showed the greatest increases (p < 0.01) as a result of FYM applications, rising from 8.4 mg kg-1 in a non-fertilized sample to 43.8 mg kg-1 in the sample with the highest Pt content. The sum of Pw, Pres and Pi bic, considered as labile P, showed comparable increases with Pacid, while Pi hid showed the smallest increase due to FYM applications. Organic P forms also increased, more so the fraction Po hid, considered less labile, than the more labile one, Po bic. The residual P fraction was practically half of Pt, independently of the Pt value. Increases in labile P, Pacid and organic P were justified by the high average concentration of Pw (36 %), Pacid (34 %), and Po hid (30 %) in the FYM. Significant changes in the proportion of P forms among soil layers indicated the downward movement of P in organic forms.

The importance of solid cattle manure application on soil microorganisms in organic and conventional cultivation

2012 ◽  
Vol 62 (7) ◽  
pp. 583-594 ◽  
Author(s):  
Liina Edesi ◽  
Malle Järvan ◽  
Merrit Noormets ◽  
Enn Lauringson ◽  
Ando Adamson ◽  
...  
Keyword(s):  
Soil Microorganisms ◽  
Cattle Manure ◽  
Manure Application

Effect of Cattle Manure Application on the Gaseous Regime of a Sandy Soil

2005 ◽  
Vol 27 (1) ◽  
pp. 51-70
Author(s):  
M. S. Hossain ◽  
S. F. Barrington ◽  
N. N. Barthakur
Keyword(s):  
Sandy Soil ◽  
Cattle Manure ◽  
Manure Application

Measuring the Impact of Social Media use in the Public Sector

2012 ◽  
pp. 48-64 ◽  
Author(s):  
Inez Mergel
Keyword(s):  
Social Media ◽  
Public Sector ◽  
Measurement Techniques ◽  
Current Standard ◽  
The Public ◽  
Use Of Technology ◽  
Standard Practices ◽  
Media Applications ◽  
The Impact ◽  
Current Practices

Existing research on eGovernment performance has provided limited proof for the impact the use of technology has on citizen participation, engagement or generally satisfaction with government activities. Social media applications have the potential to improve responsiveness, reach, and efficiency, and even cost savings in government. The current Government 2.0 initiatives launched by all executive departments and agencies of the U.S. Federal Government as a response to President Obama’s Transparency and Open Government memo show that government agencies are implementing social media applications as additional information and communication channels. This chapter provides a comparison between traditional eGovernment measurement techniques and the current practices, highlighting the current practices of measuring social media impact in the public sector. The insights are based on data collected in 2010 from interviews with social media directors in the most innovative executive departments and agencies. The results show that the current standard practices mostly include quantitative impact measures instead of the qualitative measures needed to better understand the sentiments of citizens.

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