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Bio-Economic Studies on Water Use Efficiency for Quality Onion Bulb Production

Thesis Info

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Author

Bin Abdul Hafeez, Osama

Program

PhD

Institute

University of Agriculture

City

Faisalabad

Province

Punjab

Country

Pakistan

Thesis Completing Year

2016

Thesis Completion Status

Completed

Subject

Horticulture

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/10480/1/Osama_Bin_Abdul_Hafeez_Horticulture_2016_UAF.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676724535167

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Onion is second most important crop after tomato in the world. Due to shallow root system, absence of root hairs and reduced leaf water potential, onion is considered a drought sensitive crop. Pakistan is ranked 8th in onion production. Water availability in Pakistan is continuously declining due to population explosion and limited water storability facilities in the country. Increasing water productivity seems to be the best possible option which should be adopted for better future. Keeping in view above aspects, a study was conducted to improve water use efficiency of onion. Three different experiments were executed in the field under RCBD factorial arrangements. In the first experiment, three irrigation methods (furrow irrigation, alternate furrow irrigation and fixed furrow irrigation) were tested with or without mulching. In the second experiment, onion crop was subjected to 50% water stress at different growth stages, vegetative, bulbing and bulb maturation (individually as well as in all possible combinations),to find out critical crop growth stage. A third experiment was conducted to determine the optimum irrigation interval and quantity needed for quality onion bulb production. All three experiments were conducted during 2012 and 2013. Results indicated that alternate furrow irrigation method with mulching gave similar results as normal furrow irrigation without mulching. Among growth stages, water stress at vegetative and bulbing stage was found most destructive. Water stress at these growth stages significantly reduced plant height, leaf diameter, number of leaves, leaf area, leaf area index, bulb diameter, bulb weight, number of bulbs per plant, and total and marketable yield per hectare. However, significant increase in percent dry matter contents, bolting, acidity and soluble solid contents was observed under water stress. Mulching significantly improved the water use efficiency of the plant and benefit cost ratio.Results showed that under drip irrigation system, application of 3mm and 6mm water at 2 day irrigation interval is suitable for onion crop under mulched and non-mulched conditions respectively.
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ہک بیت وچ چار ماہ

(ہک بیت وچ چار ماہ دا ذکر)

چڑھے چیتر اداسیاں آگیاں
وسوں گئی، وساکھ مرجھا گئیاں
جیٹھ جند مصیبتاں کھا گئیاں
ہاڑ، ہاڑے گھت کرلا گئیاں

ساون ساہ دا یار وساہ کی اے
بھادوں بھاہ لگی، کیہڑی، واہ کی اے

اسو آس دا پھل تباہ کی اے
کتیں کئی لٹے، عشق پھاہ کی اے

مگھر مار کے مینوں لتاڑیا ای
پوہ پاس کلیجہ ساڑیا ای
ماگھ ماہی دا ورقہ پاڑیا ای
پھگن پھاہی حنیف نوں چاہڑیا ای

Cognitive Semantic Study of the Preposition ‘Min’ in the Quran

The preposition ‘min’ is semantically more complex than what the traditional lexicaAl-syntactic approaches held it to be adverb or adverbial of place and time. This paper attempts to investigate the semantic complexity of the preposition ‘min’ from cognitive linguistic perspective to find out its semantic classification and linguistic symmetric patterns. Data has been taken from the Quran to investigate the claim of conceptual metaphor theory that sensorimotor neural structures generates the preposition ‘min’ on the image schema of source-path-goal. The findings reveal that the source-pathgoal image schema is not only at work in the use of preposition ‘min’ in spatio-geometric sense, but also to map the abstract concepts, emotional states and relationship with supernatural entities in spatial terms in the Quran. However, the data also show idiosyncratic behaviour of preposition, attaining different semantic arguments in different linguistic contexts, which strengthen the argument that language use cannot be abridged to static mapping in the human conceptual system. This paper recommends future research on the same preposition or other prepositions to investigate further the source-path-goal image schema in the Quran and Arabic language.

Bio-Ecology and Management of Mango Mealybug, Drosicha Mangiferae Green in Mango Orchards of Punjab, Pakistan

The study was conducted on bio-ecology and management of mango mealybug Drosicha mangiferae (Green) in mango orchards of Punjab Pakistan from 2004 to 2008 in District Multan, Muzzaffar Garh, Bahawalpur and Rahim yar Khan. It was concluded from the growers’ survey that among various insect pest of mango, mango mealybug was found to be the major pest followed by hoppers, fruit fly, scales, mango leaf galls Amaraemyia spp. and midges. The farmers also reported that mango mealybug caused 25-100% loss. Further the respondents indicated that ‘Chaunsa’ cultivar was the most susceptible to mango mealybug followed by ‘Fajri’, ‘Langra’ and ‘Black Chaunsa, whereas ‘Dusehri’ was resistant. Irrigation was the major source of flare up of the pest as viewed by the majority of the respondents. The practices like hoeing, ploughing, irrigation, removal of weeds, grease bands and insecticides were adapted by the respondents with variable results. The satisfaction level for the control of mango mealybug was unsatisfactory. South, East, West directions of trees showed maximum population of mango mealybug on leaves and inflorescence, whereas North direction of the plant showed minimum population. The maximum peak population of mango mealybug was observed to be 26.63 per 30-cm branch at maximum temperature of 24.64°C, minimum temperature of 10.36°C and RH 78.86%. Among twelve cultivars under study, the ‘Chaunsa’ cultivar of mango showed maximum population of mango mealybug in both the study years (104.90 and 69.83 during 2005-2006 and during 2006-2007, respectively as well as on an average of both study years (87.38), whereas ‘Tukhmi’ cultivar was found comparatively resistant with minimum population of mango mealybug i.e. 14.20, 15.86 and 18.27. On an average of both the study years, the following ranking positions towards susceptibility of mango cultivars were as under. ‘Chaunsa’ > ‘Black Chaunsa’ > ‘Malda’ > ‘Fajri’ > ‘Ratul- 12’ > ‘Langra’ > ‘Sensation’ > ‘Sindhri’ > ‘Dusehri’ > ‘Sufaid Chaunsa’ > ‘Anwar Ratul’ and >‘Tukhmi’. All the chemical plant factors on leaves and inflorescence differed significantly among various cultivars of mango. Maximum carbohydrates contents was observed in the cultivar ‘Chaunsa’ (susceptible to the pest), whereas minimum carbohydrates contents were observed in the cultivar ‘Tukhmi’ resistant to the pest. All the other factors did not show any specific sequence with the population of the pest in all the cultivars. The maximum decrease in number of fruits was recorded 11 percent on cultivar ‘Anwar Ratul’, whereas ‘Langra’ cultivar showed minimum decrease in number of fruits i.e., 3 percent over untreated trees (no control practices were applied with these trees to control mango mealybug at initial stage of the experiment). At final stage of the experiment the maximum decrease in fruits was 81 percent on cultivar ‘Chaunsa’ and minimum on cultivar ‘Tukhmi’ i.e., 22 percent. Maximum population recorded on ‘Chaunsa’ cultivar was 18/inflorescence and minimum on ‘Anwar Ratul’ was 10/inflorescence. A combination of mounds on the plastic sheet, Haider’s band and application of acetamiprid were found to be the most effective treatment resulted in 98% reduction of first instars of mango mealybug. It is further stated that the Haider’s band was the most effective and cheaper which was a new addition in the mechanical control management of mango mealybug on mango trees. The males of mango mealybug were attracted to mercury light and no males were attracted to yellow, green, red, blue lights. Male preferred to pupate in wet places near the ‘kacha’ (mud) water which can be exposed to sunlight by hoeing. This research project demonstrates the complete management programme for the control of mango mealybug under field condition for mango growers.