scholarly journals Soil Test Phosphorus Recovery from Livestock Manures Compared with Inorganic Fertilizer in Soil Incubations

2010 ◽  
Vol 2010 ◽  
pp. 1-6
Author(s):  
J. Craig Miller ◽  
T. Astatkie ◽  
Ali Madani
Keyword(s):  
Soil Ph ◽  
Repeated Measures ◽  
Phosphorus Recovery ◽  
Soil Test ◽  
Repeated Measures Analysis ◽  
Soil Test P ◽  
P Recovery ◽  
Soil Test Phosphorus ◽  
The Relationship ◽  
Fertilizer Equivalence

This paper compared dairy and hen manure P recovery relative to fertilizer P recovery for two Nova Scotia soils with different antecedent soil test P (STP), incubated for 5, 15, 30, 60, and 110 days. Fertilizer equivalence of manure P was expressed as P recovery ratio in percentage points (%PRR). Repeated measures analysis with soil pH covariate revealed: (1) manure %PRR averaged 72% (low-STP soil) and 80% (medium-STP soil), (2) there were no significant differences in %PRR between dairy and hen manure, and (3) manure %PRR decreased with incubation time for the low-STP soil but not for the medium-STP soil. The soil pH covariate was significant for both low- and medium-STP soils, and the relationship with %PRR was positive for low- but not for the medium-STP soil.

scholarly journals Finnish trends in phosphorus balances and soil test phosphorus

2008 ◽  
Vol 16 (4) ◽  
pp. 301 ◽  
Author(s):  
R. UUSITALO ◽  
E. TURTOLA ◽  
J. GRÖNROOS
Keyword(s):  
Agricultural Soils ◽  
Animal Production ◽  
Plant Production ◽  
Major Influence ◽  
Soil Test ◽  
P Loss ◽  
P Concentration ◽  
Soil Test P ◽  
Soil Test Phosphorus ◽  
Yield Responses

Soil test phosphorus (P) concentration has a major influence on the dissolved P concentration in runoff from agricultural soils. Thus, trends in soil test P partly determine the development of pollution potential of agricultural activities. We reviewed the changes of soil test P and P balances in Finnish agriculture, and assessed the current setting of P loss potential after two Agri-Environmental Programs. Phosphorus balance of the Finnish agriculture has decreased from +35 kg ha–1 of the 1980’s to about +8 kg P ha–1 today. As a consequence, the 50-yr upward trend in soil test P concentrations has probably levelled out in the late 1990’s, as suggested by sampling of about 1600 fields and by a modelling exercise. For the majority of our agricultural soils, soil test P concentrations are currently at a level at which annual P fertilization is unlikely to give measurable yield responses. Soils that benefit from annual P applications are more often found in farms specialized in cereal production, whereas farms specialized in non-cereal plant production and animal production have higher soil test P concentrations. An imbalance in P cycling between plant (feed) and animal production is obvious, and regional imbalances are a result of concentration of animal farms in some parts of the country. A major concern in future will be the fate of manure P in those regions where animal production intensity is further increasing.;

Storage of air-dry soil samples at 0 degrees C or at room temperature before analysis does not affect bicarbonate soil-test phosphorus

Soil Research ◽  
1996 ◽  
Vol 34 (2) ◽  
pp. 243
Author(s):  
MDA Bolland ◽  
DG Allen
Keyword(s):  
Room Temperature ◽  
Field Capacity ◽  
Soil Samples ◽  
Soil Test ◽  
Single Superphosphate ◽  
Cold Room ◽  
Extractable P ◽  
Soil Test P ◽  
Dry Soil ◽  
Soil Test Phosphorus

Five levels of phosphorus (P), as powdered single superphosphate, were incubated in moist soil (field capacity) for 42 days at 50�C in six different soils collected from south-western Australia. The soils were then air-dried for 7 days. Some subsamples of air-dry soil were stored for 180 days at 0�C in a cold room. Other subsamples were stored at fluctuating room temperature (18–25�C) in a laboratory and were sampled at 30, 60, 120, 150 and 180 days after storage to measure bicarbonate-extractable P (soil-test P) by the Olsen and Colwell procedures. No changes in soil-test P were detected while air-dry soil samples were stored at 0�C or room temperature.

scholarly journals Pain control in orthodontics using a micropulse vibration device: A randomized clinical trial

2015 ◽  
Vol 86 (4) ◽  
pp. 625-630 ◽  
Author(s):  
Wendy D. Lobre ◽  
Brent J. Callegari ◽  
Gary Gardner ◽  
Curtis M. Marsh ◽  
Anneke C. Bush ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Randomized Clinical Trial ◽  
Repeated Measures ◽  
Pain Perception ◽  
Control Group ◽  
Eligibility Criteria ◽  
Pain Scores ◽  
Parallel Group ◽  
Repeated Measures Analysis ◽  
The Relationship

ABSTRACT Objective:  To investigate the relationship between a micropulse vibration device and pain perception during orthodontic treatment. Materials and Methods:  This study was a parallel group, randomized clinical trial. A total of 58 patients meeting eligibility criteria were assigned using block allocation to one of two groups: an experimental group using the vibration device or a control group (n  =  29 for each group). Patients used the device for 20 minutes daily. Patients rated pain intensity on a visual analog scale at appropriate intervals during the weeks after the separator or archwire appointment. Data were analyzed using repeated measures analysis of variance at α  =  .05. Results:  During the 4-month test period, significant differences between the micropulse vibration device group and the control group for overall pain (P  =  .002) and biting pain (P  =  .003) were identified. The authors observed that perceived pain was highest at the beginning of the month, following archwire adjustment. Conclusion:  The micropulse vibration device significantly lowered the pain scores for overall pain and biting pain during the 4-month study period.

scholarly journals In-school and Out-of-school Physical Activity in Preschool Children

2016 ◽  
Vol 13 (6) ◽  
pp. 606-610 ◽  
Author(s):  
Jennifer R. O’Neill ◽  
Karin A. Pfeiffer ◽  
Marsha Dowda ◽  
Russell R. Pate
Keyword(s):  
Physical Activity ◽  
Preschool Children ◽  
Repeated Measures ◽  
Vigorous Physical Activity ◽  
Pearson Correlation ◽  
Full Sample ◽  
Repeated Measures Analysis ◽  
The Relationship ◽  
Children’S Physical Activity ◽  
Out Of School

Background:Little is known about the relationship between children’s physical activity (PA) in preschool (in-school) and outside of preschool (out-of-school). This study described this relationship.Methods:Participants were 341 children (4.6 ± 0.3 years) in 16 preschools. Accelerometers measured moderate-to-vigorous physical activity (MVPA) and total physical activity (TPA) in-school and out-of-school. In the full sample, Pearson correlation was used to describe associations between in-school and out-of-school PA. In addition, children were categorized as meeting or not meeting a PA guideline during school. MVPA and TPA were compared between the 2 groups and in-school and out-of-school using 2-way repeated-measures analysis of variance.Results:In the full sample, in-school and out-of-school PA were positively correlated for MVPA (r = .13, P = .02) and TPA (r = .15, P = .01). Children who met the guideline in-school remained comparably active out-of-school. However, those who did not meet the guideline were more active out-of-school than in-school. The groups were active at comparable levels while out-of-school. Identical patterns were seen for MVPA and TPA.Conclusions:Children’s in-school PA was positively associated with out-of-school PA. Children who did not meet the guideline in-school were more active out-of-school than in-school, suggesting preschool and classroom factors may reduce some children’s PA in-school.

scholarly journals The Effect of Deep Traumatic Overbite on the Periodontium of the Upper Anterior Teeth in a Cohort of Adult Saudi Dental Patients

2021 ◽  
Vol 01 (09) ◽  
Author(s):  
Amani A. Mirdad Mirdad ◽  
Keyword(s):  
Repeated Measures ◽  
Plaque Index ◽  
Gingival Index ◽  
Periodontal Health ◽  
Pocket Depth ◽  
Dental Patients ◽  
Anterior Teeth ◽  
Repeated Measures Analysis ◽  
Bite Plate ◽  
The Relationship

Aim: to assess the relationship between deep overbite with palatal impingement and periodontal health status in a cohort of adult Saudi dental patients. Materials and Methods:Ten patients (4 males and 6 females, aged 16 to 31 years old) with deep traumatic overbite and palatal impingement were examined. A Hawley retainer appliance with an anterior bite plate was provided for all patients.Pocket depth, bleeding index, gingival index, plaque index and mobility were recorded for four visits after using the appliance with fixed intervals in-between. Repeated measures analysis of variance (ANOVA) was used to assess the differences between visits, control /experimental teeth and surfaces (palatal /labial) for pocket depth, bleeding index, plaque index,gingival index and mobility.

scholarly journals 650 PB 022 DIFFERENT LETTUCE TYPES RESPOND SIMILARLY TO P FERTILIZATION

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 525g-526
Author(s):  
N.M. El-Hout ◽  
C.A. Sanchez
Keyword(s):  
Field Experiments ◽  
Maximum Yield ◽  
Relative Yield ◽  
Yield Potential ◽  
Soil Test ◽  
P Fertilization ◽  
Yield And Quality ◽  
Large Yield ◽  
Soil Test P ◽  
The Relationship

The production of lettuce (Lactuca sativa L.) types other than crisphead (i.e., leaf, boston, bibb, and romaine) has recently increased due to expanding consumer demand. Fertilizer P recommendations for these lettuce types are largely based on soil-test calibrations for the crisphead type only. However, biomass production and morphological traits of the different lettuce types vary. Four field experiments were conducted to compare the relative efficiencies of these lettuce types to P fertilization. All lettuce types showed large yield and quality responses to P. Because environmental conditions affected yield potential, P rates required for optimal yield varied by lettuce type within experiments. However, the P rates required for optimal yield were similar over all experiments. Furthermore, the relationship between relative yield and soil-test P across all seasons showed a similar soil-test P level was required for maximum yield of all lettuce types. The results of this study show that soil-test-based fertilizer recommendations for crisphead lettuce may be adequate for all lettuce types

Jaw Opening Decreases Window to the Deep Parotid Lobe

2018 ◽  
Vol 159 (3) ◽  
pp. 439-441
Author(s):  
Yu-Jin Lee ◽  
Uchechukwu Megwalu ◽  
Erick Melara ◽  
Vasu Divi ◽  
Vinay T. Fernandes ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Estimating Equation ◽  
Equation Model ◽  
Condylar Process ◽  
Jaw Opening ◽  
Repeated Measures Analysis ◽  
Interincisal Distance ◽  
Human Skulls ◽  
The Relationship ◽  
Improve Access

To describe the relationship between jaw opening and access to the deep parotid window, we identified the following distances in 10 human skulls: symphysis to angle of mandible, mastoid tip to angle of mandible, angle of mandible to condylar process, and mastoid tip to condylar process. With the jaw closed and open, these distances were measured with 1 to 3 wooden blocks, each measuring 1 cm, between the upper and lower incisors. The triangular deep parotid area formed by the last 3 distances was calculated. A repeated measures analysis of variance showed a significant decrease in the deep parotid area with increasing interincisal distance ( P < .01). A generalized estimating equation model demonstrated a statistically significant decreasing area of the deep parotid window with increasing interincisal distance. These results suggest that nasal intubation may improve access to the parotid window.

Wheat grain-yield response to lime application: relationships with soil pH and aluminium in Western Australia

2019 ◽  
Vol 70 (4) ◽  
pp. 295 ◽  
Author(s):  
Geoffrey Anderson ◽  
Richard Bell
Keyword(s):  
Grain Yield ◽  
Soil Ph ◽  
Relative Yield ◽  
Yield Response ◽  
Soil Test ◽  
Wheat Grain ◽  
Soil Layers ◽  
Lime Application ◽  
Definition Of ◽  
The Relationship

Soil acidity, or more specifically aluminium (Al) toxicity, is a major soil limitation to growing wheat (Triticum aestivum L.) in the south of Western Australia (SWA). Application of calcium carbonate (lime) is used to correct Al toxicity by increasing soil pH and decreasing soluble soil Al3+. Soil testing using a 0.01 m calcium chloride (CaCl2) solution can measure both soil pH (pHCaCl2) and soil Al (AlCaCl2) for recommending rates of lime application. This study aimed to determine which combination of soil pHCaCl2 or soil AlCaCl2 and sampling depth best explains the wheat grain-yield increase (response) when lime is applied. A database of 31 historical lime experiments was compiled with wheat as the indicator crop. Wheat response to lime application was presented as relative yield percentage (grain yield for the no-lime treatment divided by the highest grain yield achieved for lime treatments × 100). Soil sampling depths were 0–10, 10–20 and 20–30 cm and various combinations of these depths. For evidence that lime application had altered soil pHCaCl2, we selected the change in the lowest pHCaCl2 value of the three soil layers to a depth of 30 cm as a result of the highest lime application (ΔpHmin). When ΔpHmin &lt;0.3, the lack of grain-yield response to lime suggested that insufficient lime had leached into the 10–30 cm soil layer to remove the soil Al limitation for these observations. Also, under high fallow-season rainfall (228 and 320 mm) and low growing-season rainfall (GSR) (&lt;140 mm), relative yield was lower for the measured level of soil AlCaCl2 than in the other observations. Hence, after excluding observations with ΔpHmin &lt;0.3 or GSR &lt;140 mm (n = 19), soil AlCaCl2 provided a better definition of the relationship between soil test and wheat response (r2 range 0.48–0.74) than did soil pHCaCl2 (highest r2 0.38). The critical value (defined at relative yield = 90%) ranged from 2.5 mg Al kg–1 (for soil Al calculated according to root distribution by depth within the 0–30 cm layer) to 4.5 mg Al kg–1 (calculated from the highest AlCaCl2 value from the three soil layers to 30 cm depth). We conclude that 0.01 m CaCl2 extractable Al in the 0–30 cm layer will give the more accurate definition of the relationship between soil test and wheat response in SWA.

Stress in Migrant Farmworkers During Premigration

2011 ◽  
Vol 14 (1) ◽  
pp. 27-37 ◽  
Author(s):  
Evelyn M. Clingerman ◽  
Adama Brown
Keyword(s):  
Perceived Stress ◽  
Repeated Measures ◽  
Area Under The Curve ◽  
Self Report ◽  
Middle School Education ◽  
Lower Rio Grande Valley ◽  
Repeated Measures Analysis ◽  
Education Design ◽  
The Relationship ◽  
Pilot Feasibility Study

Purpose: This study explored the relationship between migrant farmworker (MFW) stress and salivary cortisol (sC) in a sample of MFWs prior to migration. Sample: The sample, 40 ( N = 14 male, 26 female) adult MFWs residing in the lower Rio Grande Valley of Texas, primarily comprised middle-aged immigrants with a middle-school education. Design: This pilot feasibility study included a self-report farmworker stress inventory and five serial sC specimens in 24 hr. Results: The sC measures reflected an expected diurnal pattern. Lower total cortisol (area under the curve with respect to ground) was significantly associated with greater waist circumference ( r = –.63, p ≤ .01). Repeated measures analysis of variance (ANOVA) indicated that participants who perceived high levels of farmworker stress exhibited a significant change in sC over time; F(2.14, 72.65) = 43.90, p < .001. High- and low-perceived-stress groups differed significantly in the trajectory of changes in sC over the five time points. Conclusion: MFWs experienced significant levels of stress during premigration. Their sC responses varied significantly by level of perceived farmworker stress. Lower perceived stress may reflect blunting of the sC response pattern.

The Psychophysiological Differentiation of Emotional Memories

1997 ◽  
Vol 17 (2) ◽  
pp. 111-122 ◽  
Author(s):  
Paul S. Foster ◽  
Daniel G. Webster ◽  
Edward W. L. Smith
Keyword(s):  
Heart Rate ◽  
Repeated Measures ◽  
Skin Resistance ◽  
Real Life ◽  
Personality Questionnaire ◽  
Psychophysiological Responses ◽  
Emotional Memories ◽  
Repeated Measures Analysis ◽  
Life Circumstances ◽  
The Relationship

Participants' heart rate and skin resistance responses to emotional memories (fear, anger, joy, sadness, and embarrassment) were studied to determine if the recollection of emotion is sufficient to produce psychophysiological changes, to determine if such changes differ for the various emotions, and to determine the relationship between imaginal abilities and psychophysiological responses to emotional memories. The Absorption Scale of the Multidimensional Personality Questionnaire was used as the measure of imaginal ability [1]. A repeated measures analysis of variance indicated significant differences for skin resistance but not heart rate among emotional memories, F(5,75) = 4.22, p = .002. Recollection of emotional memories, therefore, can produce psychophysiological changes in skin resistance which resemble emotions in real-life circumstances. A theoretical framework for interpretation of results on emotional memories is presented.

Sign in / Sign up

Export Citation Format

Share Document