Soil and site factors affecting the disposal of pig slurry

1989 ◽  
Vol 105 (1) ◽  
pp. 25-29
Author(s):  
J.H. Gauld
Keyword(s):  
Pig Slurry ◽  
Site Factors ◽  
Factors Affecting

scholarly journals Site Factors Affecting Growth of Slash Pine in the Texas Post Oak Belt

1997 ◽  
Vol 21 (2) ◽  
pp. 71-74
Author(s):  
W. David Hacker ◽  
M. Victor Bilan
Keyword(s):  
Stepwise Regression ◽  
Pinus Elliottii ◽  
Analysis Data ◽  
Height Growth ◽  
Slash Pine ◽  
Stem Analysis ◽  
Site Factors ◽  
Factors Affecting ◽  
Post Oak ◽  
Age Model

Abstract A study was conducted in the Post Oak Belt of East Texas to determine which site factors affected height growth of slash pine (Pinus elliottii Engelm.). Height-age pairs were developed from stem analysis data. Nonlinear regression was implemented to develop a generalized height-age model. After curves were developed, stepwise regression was used to determine impacts of environmental variables on height growth. Environmental factors correlated with height growth included A horizon depth and those related to moisture relations including seasonal precipitation, average daily temperature, and texture of the A horizon. South. J. Appl. For. 21(2):71-74.

Emetogenicity of multiday chemotherapy regimens: Drug and patient factors affecting control of CINV

2009 ◽  
Vol 27 (15_suppl) ◽  
pp. e20683-e20683
Author(s):  
J. D. Howell ◽  
H. Brown
Keyword(s):  
Single Agent ◽  
Dose Intensity ◽  
Predictive Performance ◽  
Stepwise Logistic Regression ◽  
Poor Control ◽  
Site Factors ◽  
Stepwise Logistic Regression Analysis ◽  
Age And Gender ◽  
Factors Affecting ◽  
And Gender

e20683 Background: Multi-day chemo regimens have particular advantages in increasing tolerability and maintaining dose intensity of combination cytotoxic therapy. However repeated daily insults of therapy can make control of CINV challenging. Increased knowledge of factors affecting poor control of multi-day chemo, under current CINV prevention conditions, would be beneficial. Methods: A dataset of 621 patients treated in a blinded, randomised non-inferiority study (Grunberg SM, Gabrial NY, Clark G, MASCC 2007, Abstract # 18) of a granisetron transdermal patch (TDS, Sancuso) and oral granisetron, was analysed. As TDS was shown to be non-inferior to oral granisetron, data from both arms were used. All patients had received 3–5 days of moderately or highly emetogenic chemotherapy. Total Control of CINV over Day 1 and Days 1–3 was used as the efficacy endpoint. Stepwise logistic regression analysis was used to assess the predictive performance of patient and chemotherapy factors. Wald chi-squared statistics and Akaike criteria were used to measure significance of predictive factors and model fit, respectively. Results: The simple sum of emetogenicity scores of each cytotoxic (Grunberg SM,(2005) Evaluation of new antiemetic agents_an update. Support Care Cancer (2005) 13: 80–84) provided best overall prediction of emetogenicity of the multiday regimen. Cisplatin was more emetogenic and doxorubicin less so compared to established scoring (Grunberg SM,(2005) Evaluation of new antiemetic agents_an update. Support Care Cancer (2005) 13: 80–84). Age and gender were significant in predicting control: females <60 and males <40years being at risk. A genitourinary site of cancer was also an independent risk factor. Smoking, alcohol use, previous chemotherapy and performance score had no significant effect on risk of CINV. Conclusions: Established emetogenicity scores, derived from historical data on untreated patients, are relevant to multi-day chemo but could be revised to improve prediction of CINV. Cisplatin has a stronger impact on poor control in multi-day than single-agent scoring predicts. Age and gender factors remain important; but with different age breaks for male and female. These and tumour site factors should be taken into account when designing clinical trials or analysing data relating to antiemetics and CINV. [Table: see text]

A MODEL FOR EVALUATING AND COMPARING SOIL AND SITE FACTORS AFFECTING PRODUCTIVITY OF DISTURBED AND UNDISTURBED SIMILAR AND DISSIMILAR SOILS

2009 ◽  
Vol 2009 (1) ◽  
pp. 1248-1275
Author(s):  
H. Raymond Sinclair, Jr. ◽  
Robert R. Dobos ◽  
Sharon W. Waltman ◽  
Karl W. Hipple ◽  
Joseph V. Chiaretti
Keyword(s):  
Site Factors ◽  
Factors Affecting

scholarly journals Risk and Site Factors Affecting Potential Nitrogen Delivery in the Virginia Coastal Plain

2001 ◽  
Vol 33 (1) ◽  
pp. 173-188 ◽  
Author(s):  
Wei Peng ◽  
Darrell J. Bosch
Keyword(s):  
Surface Water ◽  
Risk Aversion ◽  
Coastal Plain ◽  
Stochastic Dominance ◽  
Risk Attitudes ◽  
Risk Averse ◽  
Site Factors ◽  
Factors Affecting ◽  
Fertilizer Recommendations ◽  
Different Levels

AbstractThe effects of cropland slope, distance to surface water, farmers' risk attitudes, and farmers' nitrogen (N) fertilizer applications on potential N delivery to streams and costs of reducing N delivery were evaluated for a representative Virginia peanut-cotton farm. Target MOTAD and generalized stochastic dominance were used to select preferred plans for different levels of risk aversion. Costs of reducing N delivery were lower on farms where fields were located close to surface water, where N was overapplied relative to extension fertilizer recommendations, and where the operator was risk averse. Cropland slope had less effect on cost of reducing N delivery relative to other factors.

scholarly journals An Assessment of Labour Productivity Influencing Factors in the Construction Industry: A Case study of Zaria, Nigeria

2021 ◽  
Vol 2 (02) ◽  
pp. 26-37
Author(s):  
T. Adagba ◽  
J.O Ati ◽  
A.I Makarfi
Keyword(s):  
Labour Force ◽  
Labour Productivity ◽  
Research Area ◽  
Research Approach ◽  
Construction Sites ◽  
Site Factors ◽  
Factors Affecting ◽  
High Severity ◽  
Human Labour ◽  
Site Managers

In this research, factors affecting construction labour productivity in Zaria, Kaduna state was assessed. The research seeks to identify the factors affecting labour productivity in the research area. It is believed that this information will aid site managers and the construction professionals on decisions to take in-order to limit these controlling factors thereby leading to an improved level of efficiency in labour force, increase product labour productivity and reduce cost and time over runs on construction projects. The research adopted a quantitative research approach with the use of questionnaires as an instrument for data collection from site managers at construction sites in Zaria. Sixty-seven questionnaires were administered on construction sites within Zaria and Forty-one were returned giving a sixty-one percent response. The Questionnaire sought to assess the perception of site managers on factors affecting construction labour productivity. Data was analysed using descriptive statistics analysis to obtain frequencies, mean and Relative Importance Index (RII). RII was used to rank the factors. Thirty-Nine out of the Forty-One factors researched indicated high severity with the RII ranging between 0.60 RII < 0.80. The research revealed that external forces tend to affect construction labour productivity more than Site factors and Human Labour Factors. This can be attributed to the fact that site factors and Human Labour factors can be controlled by the site engineers while the external factors cannot be really controlled by the site engineers. The survey also revealed that Rain, Conflict with project stakeholders, Skill of labour, and Financial Crisis had a very high severity in affecting construction labour productivity on the construction sites in Zaria, Kaduna State.

Factors Affecting the Distribution and Abundance of Microlaena Stipoides (Labill.) R.br. On the Northern Tablelands of New South Wales.

1994 ◽  
Vol 16 (1) ◽  
pp. 26 ◽  
Author(s):  
DB Magcale-Macandog ◽  
RDB Whalley
Keyword(s):  
Warm Season ◽  
High Elevation ◽  
Soil Disturbance ◽  
Tree Density ◽  
Perennial Grasses ◽  
Site Factors ◽  
Pasture Management ◽  
Factors Affecting ◽  
The North ◽  
Microlaena Stipoides

The distribution of Microlaena stipoides on the Northern Tablelands of NSW was examined in a survey of 101 paddocks on 33 properties. Relationships among the abundance of M. stipoides and spatial, climatic, soil and pasture management factors were determined using X2, regression and cluster analyses. Paddocks with more abundant M. stipoides were observed in the eastern and southern parts of the Tablelands where altitude (>750 m) and rainfall (>750 mm) are higher. Higher tree density was associated with more abundant M, stipoides as were native and natural compared with highly improved pastures. Frequent cultivation (regular and intermittent) was associated with absence or very low abundance of M. stipoides. On the other hand, paddocks which had not been cultivated for along time tended to have more M. stipoides than those that had been cultivated in the last five years. Total amount of superphosphate applied, type of grazing animal and grazing method were not associated with the abundance of M. stipoides. Acidic soils had more M, stipoides than soils of higher pH (up to 6.5). Combinations of site factors such as high elevation and rainfall, high tree density, minimum soil disturbance and acidic soil lead to abundant M. stipoides in pastures. Pasture communities in the north and west of the study area had a greater abundance of native warm season perennial grasses and less M. stipoides.

Site Index Curves and Site Factors Affecting the Growth of White Pine in Southern Ontario

1990 ◽  
Vol 7 (4) ◽  
pp. 183-186
Author(s):  
Peter A. Williams ◽  
Andrew M. Gordon ◽  
Edward P. Taylor
Keyword(s):  
New England ◽  
Norway Spruce ◽  
Analysis Data ◽  
Site Index ◽  
Height Growth ◽  
White Pine ◽  
Site Factors ◽  
Southern Ontario ◽  
Factors Affecting ◽  
Breast Height

Abstract The objectives of this project were to develop site index curves and provide soil-site information for southern Ontario white pine and to compare that information to similar information on white pine from other regions and to information on Norway spruce in the study area. Sampling points were selected in unthinned white pine plantations and classified by sod textural class (course, medium, and free) and depth to distinct mottling (0-16, 16-40, and 40 + in.). Two sets of anamorphic site index curves were constructed from stem analysis data, using a total age of 30 years (SI30) and a breast height age of 25 years (SIBH25) as base ages. Significant differences due to soil factors were found in the number of years it took seedlings to reach breast height (BH) (mean = 6 5 years; range = 3 to 11 years) but not in SIBH25. Years to BH was significantly greater on clayey sites than those with loamy or sandy textures (6.1 vs. 5.0 and 4.9 years). White pine height growth in the study area compared favorably with white pine height growth in New England, Wisconsin, and Ohio. When white pine height growth was compared to the growth of Norway spruce in the study area, SIBH25 values were significantly higher for Norway spruce but years to BH were significantly lower for white pine. On poorly drained sites, site index values for white pine and Norway spruce were similar, but it took 2.2 years less for white pine to reach breast height (7.2 vs. 5.0 years). On imperfectly and well-drained sites, white pine seedlings took less time than Norway spruce to reach BH, but the site index of Norway spruce was much greater. North. J. Appl. For. 7:183-186, December 1990.

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