Effects of subsurface drainage, cultivation, and stubble retention on soil porosity and crop growth in a high rainfall area

1994 ◽  
Vol 34 (3) ◽  
pp. 411 ◽  
Author(s):  
WK Gardner ◽  
MF Drendel ◽  
GK McDonald
Keyword(s):  
Soil Structure ◽  
Positive Relationship ◽  
Growth And Yield ◽  
Soil Porosity ◽  
Significant Positive Relationship ◽  
Stubble Retention ◽  
Per Se ◽  
Direct Drilling ◽  
Western Victoria ◽  
High Rainfall Area

Wheat, triticale, and rapeseed growth and yield were studied under various tillage (conventional, deep ripping, direct drilling) and stubble-handling (burnt, retained) regimes with and without drainage at Hamilton in south-western Victoria from 1985 to 1987. Grain yield was increased from about 2 to >4 t/ha by drainage in both years; however, effects of other treatments, although significant, were much less. Soil structure (as measured by fractional air-filled porosity at -5 J/kg) deteriorated during winter and recovered during spring and summer. A laboratory experiment showed that this variation in soil structure resulted from saturation per se and redrying. In the field, the decline in porosity was most pronounced with cultivation and the absence of drainage, but overall, the effects of stubble retention and tillage treatments were small. There was a significant positive relationship between yield and porosity on undrained areas, but not where drains were present. Drainage reduced soil structural decline during winter, while stubble retention reduced the decline in porosity in the cultivated-undrained treatment in 1987.

Reduced growth and yield of wheat with conservation cropping. I. Field studies in the first year of the cropping phase

1994 ◽  
Vol 45 (3) ◽  
pp. 511 ◽  
Author(s):  
JA Kirkegaard ◽  
JF Angus ◽  
PA Gardner ◽  
W Muller
Keyword(s):  
Shoot Growth ◽  
Plant Density ◽  
Root Zone ◽  
Field Studies ◽  
Growth And Yield ◽  
Rooting Depth ◽  
First Year ◽  
Mineral N ◽  
Stubble Retention ◽  
Direct Drilling

An experiment was conducted on a red earth at Harden, N.S.W., to investigate the effects of tillage and stubble management on the growth and yield of wheat in the first year of conservation cropping. Treatments involved stubble-management systems of incorporation, burning or retention combined with tillage systems of either direct drilling or minimum tillage. The experiment was conducted on an oat stubble of 3.9 t ha-1. Direct drilling and stubble retention both reduced seedling growth by 15%, compared to cultivated and stubble burnt treatments, but had no effect on plant density or tillering. The effects on shoot growth were additive and persisted until maturity, leading to grain yields which varied from 2.16 t ha-1 for the stubble-mulched, direct-drilled treatment to 3.20 t ha-1 for the burned-stubble, minimum-till treatment. Direct drilling reduced the total root length in the profile (0-160 cm) at anthesis by 40%, but there was no effect of stubble retention. Reduced shoot growth and rooting depth on direct-drilled and stubble-retained treatments reduced the recovery of water and mineral N by the crop and increased the leaching of mineral N below the root zone. Early shoot growth reductions on direct-drilled plots were not related to levels of soil water, mineral nitrogen (N) or soil temperature. Reduced shoot growth was associated with increased severity of Rhizoctonia in some direct drilled plots, but growth reductions often occurred in the absence of obvious symptoms. High soil strength (>2 MPa) in the top 10 cm of soil may have contributed to reduced growth, although the exact mechanism remains unclear. Reduced growth associated with the presence of stubble was not caused by immobilization of N or increased leaf disease, although reduced soil temperatures may have been partly responsible.

Tillage practices and the growth and yield of wheat in southern New South Wales: Yanco, in a 425 mm rainfall region

1988 ◽  
Vol 28 (2) ◽  
pp. 223 ◽  
Author(s):  
RA Fischer ◽  
IB Mason ◽  
GN Howe
Keyword(s):  
Soil Water ◽  
Water Status ◽  
Grain Filling ◽  
Early Growth ◽  
Growth And Yield ◽  
Nitrogen And Phosphorus ◽  
Plant Nitrogen ◽  
Stubble Retention ◽  
Direct Drilling ◽  
Growth Differences

In a comparison of tillage treatments over a 3 year cropping phase (1982-84) following clover ley on a red-brown earth soil, long (9 months) and short (3 months) cultivated fallow gave the highest average wheat yields (2.80 t/ha). Cultivated fallow in year 1, followed by direct drill without fallow in years 2 and 3 yielded 2.66 t/ha, while direct drill without fallow every year averaged 2.43 t/ha (full disturbance at sowing) or 2.25 t/ha (minimum disturbance). Stubble retention when combined with direct drilling reduced yield further. Herbicide fallow followed by direct drilling gave the same yield as cultivated fallow in 1 year but a lower yield in another. Long fallow accumulated significantly more total soil water and mineral nitrogen in 2 years out of 3, while short fallow had no effect in any year. Plant population and early growth were reduced each year by the absence of fallow and by direct drilling, and also by residue retention; plant nitrogen and phosphorus status also tended to be reduced. In the absence of soil water differences at sowing and in the wetter 2 years, final grain yield differences, although always relatively smaller than early growth differences, were related to these differences in early growth which, it is concluded, reflect the main underlying cause of reduced yield with direct drilling. Reductions occurred even with a dry spring when direct drilled crops had clearly better soil and plant water status. In the driest year (1982) yield differences were small despite early growth differences. Sowing of all treatments was delayed in 2 years out of 3 because of top soil dryness in no-fallow plots. Some cultivated fallow crops showed a tendency to 'hay off' (i.e. markedly reduced harvest index and kernel weights) when the grain filling period was dry. The incidence of yellow leaf spot (Pyrenophora tritici repentis) and root diseases, although low, was greater in direct drilled crops, even after stubble burning.

Relationship of Love, Affect and Wellbeing

2014 ◽  
Vol 2 (1) ◽  
Author(s):  
Dr. Thiyam Kiran Singh ◽  
Aastha Dhingra
Keyword(s):  
Positive Affect ◽  
Positive Emotions ◽  
Positive Relationship ◽  
Interpersonal Relationship ◽  
Significant Positive Relationship ◽  
Young Females ◽  
Close Friendship ◽  
Major Facilitator ◽  
Relationship Of ◽  
The Relationship

Love is more than a close friendship. It acts as a major facilitator of interpersonal relationship. Love is positive in nature and leaves a positive affect on every individual. An individual in love not only feels positive but spreads positivity around. They smile, be kind to other people, behave compassionately with everyone. If the person is happy then he is likely to be psychologically and emotionally healthy. The current study aimed at understanding the relationship between love, affect and wellbeing among young females aged between 20-25 years. The study reported a significant positive relationship between love and positive affect with the significant correlation of 0.29 at 0.05 levels (p<0.05). It was also found a significant positive relationship between love and wellbeing with the significant correlation of 0.58 at 0.01 level (p<0.01). This means that people in love experience positive emotions and healthy wellbeing. The correlation between love and negative affect came out to be insignificant. The correlation turned out to be -0.13. This means that people in love do not experience negative emotions.

Organization-Based Self-Esteem Affects Employees' Exchange Relationship Perceptions and Extrarole Behavior

2016 ◽  
Vol 44 (3) ◽  
pp. 509-517 ◽  
Author(s):  
Yanhan Zhu
Keyword(s):  
Social Exchange ◽  
Positive Relationship ◽  
Mainland China ◽  
Negative Relationship ◽  
Self Esteem ◽  
Moderating Effect ◽  
Exchange Relationship ◽  
Significant Positive Relationship ◽  
Significant Negative Relationship ◽  
Practical Implications

The 2 types of exchange relationship perceptions—social exchange relationship perceptions (SERPs) and economic exchange relationship perceptions (EERPs)—constitute the primary concept for understanding individual behavior in the workplace. Using a sample of 581 employees from Mainland China, I explored the effects of SERPs and EERPs on employee extrarole behavior (ERB), as well as the moderating effect of organization-based self-esteem (OBSE) on the relationships between SERPs and ERB, and between EERPs and ERB. The results revealed a significant positive relationship between SERPs and ERB, a significant negative relationship between EERPs and ERB, and a significant moderating effect for OBSE. Theoretical and practical implications of these findings are discussed.

scholarly journals Managers and Organizational Citizenship Behavior

2016 ◽  
Vol 21 (1) ◽  
pp. 14-20
Author(s):  
Mihaela Man
Keyword(s):  
Organizational Citizenship ◽  
Big Five ◽  
Organizational Citizenship Behavior ◽  
Positive Relationship ◽  
Citizenship Behavior ◽  
Five Dimensions ◽  
Significant Positive Relationship ◽  
The One ◽  
The Relationship ◽  
Persistence Factors

Abstract In this research on the one hand we analyzed the relationship that exists in terms of motivational persistence and the Big Five dimensions and, on the other hand, organizational citizenship behavior (OCB). The results show that the conscientiousness has been identified as being in a significant positive relationship with OCB. This result is consistent with the data provided by previous researchers. The results also indicate that three conscientiousness facets are in a positive relationship with OCB. These three conscientiousness facets are self-efficacy, cautiousness and orderliness. Agreeableness was not identified as being associated with OCB. At the level of the relationship between motivational persistence factors and OCB, we have identified a significant positive relationship with only one factor: current purpose pursuing. The OCB model has two variables that work best as predictors: high scores with regard to current purpose in terms of the pursuing-motivational persistence factor, and low scores in terms of the imagination-facet of openness to experience.

Total Dissolved Solids as a Predictor of Lake Biomass and Productivity

1983 ◽  
Vol 40 (1) ◽  
pp. 92-95 ◽  
Author(s):  
E. E. Prepas
Keyword(s):  
Chlorophyll A ◽  
Significant Relationship ◽  
Positive Relationship ◽  
Biomass Productivity ◽  
Total Dissolved Solids ◽  
Fish Production ◽  
Dissolved Solids ◽  
Significant Positive Relationship ◽  
Morphoedaphic Index ◽  
Shield Lakes

Total dissolved solids (TDS) and chlorophyll a were not related in 25 lakes which were all off the Precambrian Shield. Both on-shield and off-shield lakes were included in the previous reports which showed a significant relationship between TDS and productivity. When data from on-shield and off-shield lakes were analyzed separately, there was no significant positive relationship between TDS and lake biomass or productivity. It was also shown that mean depth ([Formula: see text]) was as good a predictor of fish production as the TDS: [Formula: see text] ratio, the morphoedaphic index.Key words: TDS, biomass, productivity, morphoedaphic index, chlorophyll a, lakes

Relationship between clinical anger and suicidal ideation among people with physical disabilities

2021 ◽  
Vol 71 (10) ◽  
pp. 2442-2444
Author(s):  
Naila Andleeb ◽  
Sadaf Ahsan ◽  
Sadaf Zaheer ◽  
Farhana Sajjad
Keyword(s):  
Spinal Cord ◽  
Suicidal Ideation ◽  
Data Collection ◽  
Positive Relationship ◽  
Physical Disabilities ◽  
Artificial Limbs ◽  
Significant Positive Relationship ◽  
Physically Disabled ◽  
People With Physical Disabilities ◽  
Mental And Physical Health

Present research was intended to examine the association between suicidal ideation and clinical anger among the physically disabled. The Purposive Convenient study was conducted at Artificial Limbs Centre, Fauji Foundation Hospital Rawalpindi from February 2016 to November 2016. The modified scale for suicidal ideation and the clinical anger scale were used for data collection. Sample comprised of 150 physically disabled individuals including 87 (56%) males and 63 (42%) females.  Findings revealed that suicidal ideation had significant positive relationship with clinical anger and females were significantly higher in clinical anger and suicidal ideation as compared to males. Furthermore,results revealed higher mean scores on clinical anger by the participants having the problem of spinal cord 26.10±9.25 and suicidal ideation is higher in persons having problem of polio 15.87±9.41as compared to other physical disabilities. The study highlighted the need develop and enhance mental and physical health. Continuous...

The Macroeconomic Determinants and FDI: Evidence from 14 International Alliances

2021 ◽  
Vol 9 (2) ◽  
pp. 69-82
Author(s):  
Sujan Chandra Paul ◽  
Md Harun Or Rosid ◽  
Mohammad Rakibul Islam ◽  
Refat Ferdous
Keyword(s):  
Unemployment Rate ◽  
Positive Relationship ◽  
Robust Regression ◽  
Negative Relationship ◽  
African Union ◽  
G7 Countries ◽  
Significant Positive Relationship ◽  
Brics Countries ◽  
Arab League ◽  
Asean Countries

This study investigates the relationship between Foreign Direct Investment (FDI) and some macroeconomic variables such as Gross Domestic Product (GDP), Gross Capital Formation (GCF), Agriculture, Forestry, and Fishing (AFF), Industry, Import, Export, Inflation and Unemployment rate. Panel Data of 14 regional alliances countries from 1990-2018 were collected from The World Bank website. Robust regression models are used in this study. This research found that GDP had significant positive relationship with FDI in all regions except Arab League, EU and G7 countries. GCF had significant positive relationship with FDI in Arab League, BRI, GATT, NAFTA countries & negative relationship in APEC, G7 countries. AFF had significant positive relationship with FDI in BRICS, GATT countries & negative relationship in African Union, ASEAN, BIMSTEC, BRI, BRICS, SAFTA countries. Industry had significant positive relationship with FDI in African Union, BRI, NAFTA, OECD countries and negative relationship in BRICS, G7, G20 countries. Import had significant positive relationship with FDI in African Union, APEC, Arab League, ASIAN, BRI, G7, G20, GATT countries and negative relationship in BRICS countries. Export had significant positive relationship with FDI in BRICS countries and negative relationship in African Union, ASEAN, BRI, G20, GATT, OECD, SAFTA countries. Inflation had significant positive relationship with FDI in GATT, SAFTA countries and negative relationship in African Union, APEC countries. Unemployment rate had significant positive relationship with FDI in African Union, BRI, BRICS, EU, G20, GATT, OECD, SAFTA countries and negative relationship in ASEAN countries.

scholarly journals Factors Affecting Business Strategy Implementation of Vietnam Garment Companies

2016 ◽  
Vol 12 (1) ◽  
pp. 133
Author(s):  
Hoang Viet Nguyen ◽  
Duc Nhuan Nguyen
Keyword(s):  
Human Resources ◽  
Corporate Culture ◽  
Business Strategy ◽  
Positive Relationship ◽  
Strategy Implementation ◽  
Point Of View ◽  
Strategy Formulation ◽  
Factors Affecting ◽  
Significant Positive Relationship ◽  
The Impact

This paper studies the impact of factors affecting on business strategy implementation of Vietnam garment companies. A total of 192 questionnaires were administered to respondents chosen from 82 Vietnam garment companies. The findings indicated that there is a significant positive relationship between 05 factors: Strategy formulation-Human resources-Communication-Corporate culture-Organizational structure and business strategy implementation from the sample point of view.

scholarly journals Production and Cultivated Area Variation in Cereal, Rice, Wheat and Maize in China (1998–2016)

Agronomy ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 222 ◽  
Author(s):  
Wang ◽  
Gao ◽  
Gao ◽  
Zhao ◽  
Wang ◽  
...  
Keyword(s):  
Positive Relationship ◽  
Maize Production ◽  
Significant Positive Relationship ◽  
Wheat Production ◽  
The Past ◽  
Cereal Production ◽  
Area Variation ◽  
Consequent Increase

The production of cereals, including rice, wheat, and maize has increased in China over the past 20 years. However, variations in the production and cultivated area of cereals remains unclear. In this study, we collected and analyzed the cereal production and cultivated area in China from 1998 to 2016. An 85% increase in cereal production was recorded from 1998 to 2016, due to an increase in the maize production along with the increase in the cultivated area. Meanwhile, rice and wheat production have been stable since 2000. No change occurred in the rice cultivated area through 2016, and a 19% decrease in the wheat cultivated area was observed in 2016 relative to 1998. In addition, a significant positive relationship was observed among cereal production, maize production, and cultivated area (p < 0.0001). Together, the increase in cereal production in China over the past two decades has resulted from the increase in maize cultivated area and the consequent increase in maize production.

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