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Growth and Yield Response of Cotton to Various Agronomic Practices

Thesis Info

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Author

Munir, Muhammad Kashif

Program

PhD

Institute

University of Agriculture

City

Faisalabad

Province

Punjab

Country

Pakistan

Thesis Completing Year

2014

Thesis Completion Status

Completed

Subject

Applied Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/2399/1/2958S.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726347741

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Appropriate agronomic practices like cultivar selection, planting date, plant density, and nitrogen management have a profound effect on the development and final outcome of the crop. Two field experiments to evaluate the growth and yield response of cotton (Gossypium hirsutum L.) to various agronomic practices were carried out on a loam soil at Post Graduate Agricultural Research Station, University of Agriculture, Faisalabad, during the year 2007 and 2008. In first trial, response of three different cotton varieties (CIM-496, MNH-786 and FH-113) to three sowing dates (1 st week of May, 4 th week of May and 3 rd week of June) and three plant spacing (22.5 cm, 30.0 cm and 37.5 cm) was evaluated. Results revealed that number of monopodias and sympodias per plant, plant height, height to node ratio, number of main stem nodes, number of bolls per plant, boll weight, seed cotton yield per plant and seed cotton yield per hectare differed significantly between sowing times, varieties and plant spacings but plant population was significantly varied only by varying plant spacing. Plant spacing did not influence significantly cotton leaf curl virus (CLCuV) infestation and earliness parameters. The ratio of CLCuV effected plants increased with delay in planting as early sown cotton (1 st week of May) up to 90 days after sowing resulted in low virus attack (16.6% in 2007 and 14% in 2008) compared to 100% virus infestation in late sown cotton (3 rd week of June) during both the years. Cultivar FH-113 proved to be more resistant to virus attack than other varieties. Cotton grown in 1 st week of May had higher seed cotton yield (2796 and 2521 kg ha -1 , during 2007 and 2008, respectively) at wide plant spacing (37.5 cm). Whereas, cotton sown in 3 rd week of June gave higher seed cotton yields at 22.5 cm plant spacing in 2007 with value of 778 kg ha -1 and at 30 cm plant spacing in 2008 giving 831 kg ha -1 . Averaged over sowing time, the cotton Cultivar FH-113 produced significantly highest seed cotton yield (2389 kg ha -1 and 2000 kg ha -1 , during 2007 and 2008, respectively) at wide plant spacing whereas both CIM-496 and MNH-786 gave similar yields at wider and normal plant spacing. Leaf area index (LAI), leaf area duration (LAD), total dry matter (TDM) production and crop growth rate (CGR) were also increased with early sowing and close plant spacing. Fiber quality parameters were not influenced significantly by sowing time or plant spacing. Therefore, farmers should sow FH-113 at 37.5 cm spacing for early sowing while for late sowing plant spacing should be 30 cm to have higher seed cotton yield. In second experiment four nitrogen levels (0, 60, 120 and 180 kg ha -1 ) were applied at three xvinter row spacings (60, 75 and 90 cm) . Both the factors significantly influenced monopodias and sympodias per plant, plant height, main stem nodes, height to node ratio, number of bolls per plant, boll weight, seed index, lint index, seed cotton yield per plant and seed cotton yield per hectare but fiber quality traits were not significantly affected. Leaf area index, leaf area duration, total dry matter production and crop growth rate also increased with increased nitrogen level and decreased row spacing. The maximum seed cotton yield (2106 and 1936 kg ha -1 in 2007 and 2008, respectively) was recorded in 75 cm row spacing due to more number of bolls m -2 . Similarly, highest seed cotton yield (2197 and 2032 kg ha -1 in 2007 and 2008, respectively) was produced by applying 180 kg N ha -1 which was also statistically similar to 120 kg N ha -1 in both experimental years. For economic seed cotton yield cotton should be sown on 75 cm spaced rows with 120 kg ha -1 of nitrogen. Key Words: Gossypium hirsutum, planting date, plant spacing, cotton varieties, nitrogen, row spacing, seed cotton yield and fiber quality traits.
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شہید کی جوموت ہے وُہ قوم کی حیات ہے

شہید کی جو موت ہے وہ قوم کی حیات ہے
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قوم اس وقت اپنے مستقبل کی درخشندگی کے لیے مستعد ہوتی ہے جب وہ ذہنی طور پر آسودہ ہو، فکری اعتبار سے توانا ہو اور اس قسم کے ماحول کی تشکیل کے لیے شہید کا وجود...

The Aligarh Miracle

Social movements are considered to be a modern phenomenon but they have existed in the past as well. Aligarh movement initiated by Sir Sayyid Ahmed khan is a typical social movement from 19th century, aimed at modernization and uplift of the Muslim community of India. It emerged in a period when the Indian Muslims were facing a sharp decline in their socio-economic and political status. This decline had created a psychology of retreat among them wherein they suspected any attempt to reform their lot. For instance, the introduction of modern education by the British rulers was adopted by the Hindu majority for obvious economic benefits. Conversely, the Muslims remained wary of modern education, particularly the English language as a conspiracy to destroy their age-old culture and religion. In this backdrop Sir Sayyid Ahmed Khan’s tireless drive to inculcate modern education proved to be a miracle that transformed the Muslim middle classes for the next century. Although Aligarh movement has attracted tremendous scholarship, there has been virtually little attempt to theorize it as a social movement. In this context the present paper aims to study Aligarh Movement on the parameters of contemporary theories highlighting the causal dimensions of social movements. It will particularly explore the relevance of the elements of deprivation, resource mobilization, political processes, structural strain and those highlighted by the new social movement theory as causal factors in the emergence and evolution of Aligarh Movement.

Antecedents and Consequences of Organizational Politics: A Study of the Public Sector Organizations of Pakistan

Organizational politics is a common and pervasive phenomenon of occupational life. This is the reason that various approaches have been used to understand and analyze the nature of organizational politics. Literature shows a main stream of researches conducted to examine the political behavior tendency and political skill capitalization among individuals. However, employees usually feel reluctant to report the political activities and tactics exercised for their personal benefits. Therefore, most of the contemporary researches are more focused on analyzing the perception of politics among employees which gives a clear picture of the prevalence of organizational politics. This study was an attempt to examine the perception of politics and its possible causes and effects. It endeavored to identify the reactions regarding organizational politics based on the Hirchsman’s theory of organizational decline also known as Exit, Voice, Loyalty, Neglect (EVLN) Model of Hirchsman’s (1970). The consequences were taped in terms of the intensity of the reactions such as they might start developing turnover intentions (exit), involve in counterproductive behavior (neglect), blow whistle (voice), or show affective commitment (loyalty) with the organization. All these reactions were triggered from extreme to lenient. Variables which have been repeatedly found key predictors to organizational politics in the literature, were selected as antecedents. In this way, participation in decision making, role stressors and machiavellianism were assumed to have influential effects on perceived politics. Perception of politics was also examined to have any mediating role between selected explanatory (participation in decision making, role conflict, role ambiguity and machiavellianism) and criterion variables (affective commitment, counterproductive behavior and turnover intentions). For data collection, questionnaire survey was carried out based on statistically reliable measures adopted from various sources. Only public sector organizations operating within the vicinity of federal territory of Pakistan were approached. Out of 600 floated questionnaires, 424 usable responses of employees working at various levels in different capacities were received. Results showed significant effects of both role stressors i.e. role conflict and role ambiguity as well as of machiavellianism towards perceived politics. Participation in decision making showed although negative but insignificant effects towards organizational politics. Turnover intentions emerged as the strong and statistically significant outcome of flourishing politics followed by affective commitment which had inverse and highly significant relationship with perception of politics. Counterproductive behavior appeared as the third critical upshot of politicized environment. Last of all the results revealed the role of whistle blowing which also had positive and significant relationship with the perception of politics. Mediating of perception of politics was also confirmed between participation in decision making and affective commitment, participation in decision making and turnover intentions, role conflictII and turnover intentions, role conflict and counterproductive behavior, role ambiguity and counterproductive behavior as well as between machiavellianism and counterproductive behavior. Furthermore, partial mediation was found between machiavellianism and turnover intentions. This study provides valuable contribution due to various reasons. Literature shows a dominant contribution of researches and theories from western cultures which are characterized as more individualistic society in nature as compared to eastern culture. Hofstede (1980 & 1993) emphasized the contextual nature of theories to be generalized in different organizations and institutes therefore, this study was an attempt in this regard to know the causes and consequences of the perception of politics from a developing country which is more a collectivist society as specified by Hofstede’s dimensional scale. This study also incorporated role conflict and whistle blowing as antecedent and consequence of perceived politics which have rarely been used in any setting.