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Home > Growth and Yield Response of Tomato Lycopersicon Esculentum Mill. Cultivars to Exogenously Applied Calcium Carbide

Growth and Yield Response of Tomato Lycopersicon Esculentum Mill. Cultivars to Exogenously Applied Calcium Carbide

Thesis Info

Access Option

External Link

Author

Siddiq, Sumreen

Program

PhD

Institute

University of Agriculture

City

Faisalabad

Province

Punjab

Country

Pakistan

Thesis Completing Year

2012

Thesis Completion Status

Completed

Subject

Applied Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/handle/123456789/347

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726348289

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Presently many chemicals have been identified that produce ethylene in the air of soil. Calcium carbide (CaC 2 ) is one of them and is being considered well known source of ethylene (C 2 H 4 ). The C 2 H 4 released from CaC 2 is not thoroughly investigated particularly for production of vegetables with improved quality. Laboratory, pot and field studies were conducted to evaluate the effectiveness of calcium carbide on tomato seed germination, growth, yield, photosynthesis and quality parameters. The first experiment was conducted under laboratory conditions to assess the best rate of calcium carbide for seed germination, root and shoot growth rate of five different tomato cultivars. It was found that application of CaC 2 @ 15 mg per Petri plate was the best among all rates that improved seed germination, root and shoot growth. Tomato cultivars performed better were selected for the next experiment. The three selected cultivars were grown in compost medium containing three different rates of calcium carbide with different five coatings in growth room under controlled conditions. Results showed that CaC 2 at the rate of 200 mg cup -1 with polyethylene, paint and paraffin coatings performed relatively better. In the 3rd experiment best selected calcium carbide based formulations in three different rates were further compared in the presence of recommended fertilizers in a pot study. Thus comparison included their effect on tomato growth, yield, photosynthetic activity and quality parameters. Data on plant height, number of flower per plant and proportion to fruit drop, yield of tomato fruit, root and shoot dry weight, and nitrogen uptake clearly showed positive effect of CaC 2 in the presence of fertilizer on all stages of growth of tomato compared to control (fertilizer only). One further pot experiment was conducted to know the best rate and time of application of formulated calcium carbide in the presence of recommended fertilizer. Results obtained were compared with those obtained from control treatment (containing fertilizer only). It is evident from the results that CaC 2 applied 2 weeks after transplanting performed better among all rates and times of application in improving almost all growth and yield parameters of tomato. Based upon the results from laboratory and pot trials, field experiment was conducted to verify the results obtained from previous experiments. In this field experiment, effect of different rates of coated CaC 2 was investigated on two best performing cultivars selected from previous experiment. The results showed that application of CaC 2 at the rate of 200 mg plant -1 not only improved growth and yield parameters of both tomato cultivars but also enhanced N uptake by different plant parts and improved nitrogen use efficiency. Overall results suggest that addition of calcium carbide along with recommended doses of fertilizers improved fruit yield more than 40 % by improving yield contributing parameters and N use efficiency. Furthermore, quality parameters related to physical appearance and chemical composition of tomato fruits were also improved by the application of CaC 2. These parameters are very much required for improvement in shelf life and processing of tomato products. In the nutshell, results confirm the growth regulator role of CaC 2 in improving the growth, yield and quality of tomato.
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43. Az-Zukhruf/Decoration of Gold

43. Az-Zukhruf/Decoration of Gold

I/We begin by the Blessed Name of Allah

The Immensely Merciful to all, The Infinitely Compassionate to everyone.

43:01
a. Ha. Mim.

43:02
a. By the Book of Divine Qur’an - clear in itself and clearly guiding to the truth.

43:03
a. Indeed, WE have made it a Qur’an in Arabic,
b. so that you may understand its meaning, comprehend its demands and live your lives accordingly.

43:04
a. And, indeed, this - The Divine Qur’an - is in the Mother of the Book with US -
b. it is truly exalted and full of wisdom.

43:05
a. O The Disbelievers!
b. Should WE withdraw the Reminder – The Divine Qur’an - from you just because you are a people gone beyond limits in its denial?
c. No. WE shall not!

43:06
a. And how many Prophets have WE assigned to the earlier people before you, O The Prophet!

43:07
a. Yet not one Prophet came to them whom they would not ridicule,
b. the same way people ridicule you and your message.

43:08
a. So WE destroyed those who were more powerful in prowess, strength, and might than them,
b. and thus they have become history.

43:09
a. And if indeed you were to ask them:
b. ‘Who created the celestial realm and the terrestrial world?’

c. They would surely answer:
d. ‘The Almighty, The All-Knowing created them.’

43:10
a. It is HE WHO made the earth a habitat for you, and
b. has set pathways within it for you so that you...

The Role of Ubuntu Ethics in Promoting Citizenship Values: An Investigation into the Foundations of Social Harmony

In the post-industrial revolution world, social change is often studied and understood in the context of change in means of production, mobility, urbanization and change in the constitution of workforce. Role of ethical values is generally confined to personal conduct and manners. Industrial society is supposed to have its own work ethics which may or may not agree with personal ethics and morality. Ethics and morality are generally considered, in the Western thought, as a social construct. Therefore, with the change in means of production or political system, values and morality are also expected to be re-adjusted in order to cope with the changed environment. Sometimes a totally new set of values emerges as a consequence of the change in economic, political, or legal set up. The present research tries to understand the meaning and place of these values in a global socio-cultural framework. Relying essentially on the divine principles of the Qur'ān it makes an effort to understand relevance of these universal and ultimate principles with human conduct and behavior in society.  It indicates that essentially it is the core values, principles, or norms which guide human beings in their interpersonal, social, economic and political matters. Islam being a major civilizing force, culture, and the way of life, provides values which guide both in individual and social matters. The values given by the Qur’ān and the Sunnah are not monopoly of the Muslim. These values are universal and are relevant in a technological society.

Weed Population Dynamics and Wheat Productivity under Different Tillage Systems in Pothwar

Agriculture of Pothwar region is mainly rainfed and the small farmers of this area do not get sustainable income from the farmland due to inconsistent and erratic rainfall. Thereore, a two-year field study was carried out at University Research Farm of Pir Mehr Ali Shah-Arid Agriculture University Rawalpindi located at Mandra-Chakwal Road in district Rawalpindi of Pakistan, to investigate the effect of different tillage practices and sowing years on weed seed bank dynamics and above ground weed flora in rainfed wheat. This study was also aimed at to find out the most efficient tillage practice that conserves the soil moisture for longer period and is economically acceptable to the farming community of Pothwar Region. At the same time it was expected that this investigation would help us to meet the challenges of rainfed wheat of Pothwar Region. Moreover, the information collected based upon this study especially weed flora and soil weed seed bank could be utilized for planning better weed management strategies in rainfed crops in future. Different tillage combinations were included on: T1 = Conventional Tillage (1MB Plowing + 8 Cultivations), T2 = No-till + *Glyphosate, T3 = 1MB Plowing + *Glyphosate, T4 = 1MB Plowing + 4 Cultivations, T5 = Disc Harrowing + *Glyphosate, T6 = Disc Harrowing + 4 Cultivations, T7 = Chiseling + *Glyphosate. Soil samples were collected before sowing to define the soil. The experiment was laid out in randomized complete block design (RCBD) with four replications. The effects of treatments were recorded on weed population density, weed population frequency, weed ground coverage, weed dry biomass, weed relative density, weed relative frequency, weed relative ground coverage, weed relative dry weight, weed relative abundance, summed dominance ratio and 29 importance value index of weeds. The data on yield and yield components of wheat viz. number of fertile tillers (m-2) at maturity, spike length (cm), number of spikelet spike-1, number of kernels spike-1,1000-kernel weight, aerial biological yield (t ha-1) and grain yield (t ha-1) were collected at harvest. Soil samples were collected and analysed accordingly to record data for soil parameters like soil moisture content, soil bulk density, soil porosity, organic matter, soil available nitrogen, soil available phosphorus and soil extractable potassium to evaluate the soil properties at pre and post experimentation. Data were analyzed by using MSTAT-C software on computer and treatment means were compared with least significance difference test (LSD) at 5% level of probability. The input and output data was collected for economic evaluation (partial budget, dominance analysis and marginal rate of return analysis) to identify the most affordable tillage combination. Results illustrated that the weed seed density was found maximum (29476) in zero tillage system. The study also revealed that there were small differences of weed seed density under different tillage systems, but the minimum number of seeds was found in reduced tillage systems i. e. T1 (21419) and T4 (22513). The vertical distribution of weed seeds indicated that the highest number of weed seeds (54.99 %) was observed at upper soil layer 0-10 cm, while the least (16.33 %) in lower soil layer 21-30 cm as compared to middle layer 11-20 cm having (28.54 %) seeds. Overall the higher seed density (28032) was observed at post-harvesting of wheat as compared to pre-sowing of wheat (21828) in all the tillage systems during both years of experimentation which could be the result of poor weed control during crop growth and development period. Chenopodium album, Asphodelus tenuifolius and Fumaria indica were considered as the dominant weed 30 community followed by Euphorbia helioscopia, Convolvulus arvensis and Melilotus indica in the overall soil weed seed bank. The weed flora population density, frequency, dry weight and ground coverage were found maximum under T6, T7, T5 and T4 treatments; whereas, these parameters were minimum under T1 which reflects the system’s controlling effect on weed flora and thus resulted in the higher yield. Soil properties were improved in reduced tillage systems i. e. T4 and T6 (conservation tillage systems), but the crop germination and establishment was best under conventional tillage and T3 (according to cluster analysis). The reason of low seedling emergence under conservation tillage systems was probably due to inadequate availability of soil moisture and nutrients well in time. The highest yield (3.5132), (3.1242) t ha-1 and net benefit (888.92), (839.35) $ ha-1 were obtained in case of conventional tillage (T1) followed by reduced tillage (T4) according to partial budget analysis. So, on the base of above mentioned facts further experimentation is recommended on integrated weed management under conservation tillage systems for controlling soil weed seed bank and above ground weed flora for obtaining higher yields, but conventional tillage is still recommended for obtaining higher net benefit. The management of weed flora through integrated weed management under conservation systems may decrease the weed crop competition and improve the moisture and nutrients availability to crop that may increase the crop yield.