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Home > Influence of Zinc and Boron Nutrition on the Perfomance of Conventional and Conservation Rice-Wheat Cropping Systems

Influence of Zinc and Boron Nutrition on the Perfomance of Conventional and Conservation Rice-Wheat Cropping Systems

Thesis Info

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Author

Nadeem, Faisal

Program

PhD

Institute

University of Agriculture

City

Faisalabad

Province

Punjab

Country

Pakistan

Thesis Completing Year

2018

Thesis Completion Status

Completed

Subject

Agricultural Technology

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/10501/1/Faisal%20Nadeem_Agronomy_2018_UAF_12%20Feb.%202019.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726465709

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Micronutrients deficiency particularly zinc (Zn) and boron (B), and some sustainability issues, in the conventional rice-wheat cropping systems (RWCS), are threatening the performance and productivity of this important system. Experiments were conducted at farmer field in Punjab, Pakistan to improve the productivity of conventional and conservation RWCS through Zn and B application. Residual effect of both Zn and B on the following rice and wheat both crops were also investigated. In the experiments first and second, wheat was grown under zero tillage (ZT) and conventional tillage (CT). In first experiment, Zn was applied as was delivered as foliar application (FA; 0.025 M), soil application (SA; 10 kg ha-1) and seed priming (SP; 0.5 M); while in experiment second, B was applied as SP and FA (0.01 M) and SA (1 kg ha-1). After the wheat harvest, rice was seeded in puddled-transplanted (PuTR) and direct seeded aerobic (DSAR) conditions. In the experiments third and fourth, rice was planted under PuTR and DSAR; and Zn was applied in third experiment as SA (10 kg ha-1), SP (0.01 M) and FA (10 kg ha-1). Whereas, in experiment fourth, B was delivered as SP (0.01 M), FA (0.25 M) and SA (1 kg ha-1). After the rice harvest, wheat was seeded in CT and ZT. Experiments were executed in randomized complete block design in split-plot arrangements and replicated four times. Conventional and conservation tillage in both rice and wheat significantly affected the soil health, weeds dynamics and grain yield. Soil physio-biological properties were better in zero till wheat (ZTW) than plough till wheat (PTW) evident from high soil organic matter (OM), soil organic matter (SOC) and microbial biomass nitrogen (MBN). Moreover, PTW-PuTR system had poor soil health and fertility than ZTW-DSAR. In first experiment, the ZTW yield was higher than PTW; Zn, SP in ZT improve grain yield 40% and 32.3% during first and second year, respectively. Grain Zn concentration increases by 38-58% with SA and FA, Zn. Residual effect of Zn on following rice crop improve grain yield by 19% in rice followed PTW-SA and ZTW-SA; and grain Zn concentration increased by 29% in rice followed ZTW-SA. In second experiment, B, SP in ZTW and SA in PTW increase 30.52% and 30.29% during first year; whereas 25-28% during second year, respectively. SA, FA, B increased grain B from 20-35% during both years; residual B increase rice grain yield by 36% in the ZTW-SA and PuTR-SA and grain B concentration by 30% in rice followed ZTW. In experiment 3, DSAR produced 21% and 24% higher yield than PuTR with SP and SA, Zn and grain Zn concentration increased by 57% with SA, Zn. Residual Zn effect on Zn increase grain yield by 40% in wheat followed by DSAR-SA; ZTW yield was 4.85% higher than PTW. In fourth experiment, DSAR produced higher yield than PuTR; moreover, SP and SA, Zn improved 34% and 28% respectively. Residual effect of B improved grain yield in ZTW followed by DSAR-SA by 15% and grain B concentration by 25% in wheat followed the DSAR-SA. The PuTR-PTW had poor soil structure due to highest soil bulk density, lowest soil porosity, the low OM, the SOC and MBN than DSAR-ZTW. In conclusion, switching from conventional to conservation tillage systems improved the profitability, productivity and soil health under the RWCS. Application of Zn and B and their carry over effect on following crops greatly contributed to enhance performance of rice and wheat under conservation tillage systems.
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حفیظؔ جالندھری

حفیظؔ جالندھری
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راقم کو علی گڑھ مسلم یونیورسٹی میں ۱۹۳۴؁ء میں ان کا کلام ان کی زبانی سننے کا اتفاق ہوا تھا، وہاں طلبہ کی یونین میں مدعو تھے، جو ان کی آمد پر اوپر سے نیچے تک بھرگیا تھا، وہ اس وقت تک شاہنامہ اسلام کے شاعر کی حیثیت سے مشہور ہوچکے تھے، طلبہ ان سے اردو شاعری کے فردوسی کی حیثیت سے مل رہے تھے، انھوں نے شاہنامہ اسلام کا کچھ ٹکڑا اپنے خاص ترنم میں سنایا، تو ایسا محسوس ہوا کہ وہ واقعی ابوالاثر ہیں، شاہنامہ کی پہلی جلد ہی شائع ہوسکی، جس میں جنگ بدر تک کے حالات ہیں، اس زمانہ میں اعلان ہوا تھا کہ اس کی دوسری جلد میں غزوات نبویؐ کی تفصیل ہوگی، پھر تیسری جلد میں خلفائے راشدینؓ اور اسلامی فتوحات کی باری آئے گی، اردو شاعری کے اس فردوسی کو ایک محمود کی...

خلع فسخ نکاح ہے یا طلاق فقہائے کرام کی آراء کا تجزیاتی مطالعہ Whether Khula is Dissolution of Marriage or Divorce Critical Analysis of the Views of Islamic Jurists

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Impact of Negative Experiences on Academic Achievement of University Students: Cognitive Distortions As Mediating Factor

Negative experiences are part of life and being the part of life, negative experiences, can have potential effects on individuals‘ cognitive abilities which may further affect their academics. To explore this issue, prime efforts in this research were made to determine the impact of university students‘ negative experiences on their academic achievement as well as on the development of cognitive distortions among them. Furthermore, role of cognitive distortions as mediator between negative experiences and academic achievement was to be calculated also. Study objectives were followed by developing Questionnaire of Negative Experiences, and Scale of Cognitive Distortions along with self-reported GPA (Grade Point Average). Validity and reliability of developed tools was established by means of expert judgment and statistical procedures consequently. Research tools were administered to university students of Pakistan. Total 2213 students of final year were selected from 7 universities through cluster sampling technique. To reach the conclusion, frequency, percentage, and mean score were calculated for descriptive analysis. Moreover, Structure Equation Modeling (SEM) was adopted to calculate mediating role of cognitive distortions between negative experiences and academic achievement. Results revealed that departmental and friends‘ problems caused decline in academic achievement of university students. In contrast, financial issues, emotional experiences, and family problems became triggers of academic performance. Upon facing a number of stressful events, several cognitive distortions (i.e. ―Emotional Reasoning‖, ―Dichotomous Thinking‖, ―Fortune Telling‖, ―Labeling‖, ―Discounting Positive‖, ―Mental Filtering‖, ―Self-Blaming‖, and ―Mind Reading‖) were developed among university students. ―Fortune Telling‖, ―Discounting Positive‖, and ―Self Blaming‖ were clear source of decline in academic achievement. Whereas students‘ GPA was seem to be increased due to ―Emotional Reasoning‖, All-or-Nothing, ―Labeling‖, Mental Filter, ―Maximization‖, and ―Mind Reading‖. Only five of the focused cognitive distortions were found to mediate the impact of negative experiences on academic achievement of university students: ―All-or-Nothing‖, ―Discounting Positive‖, ―Fortune Telling‖, ‗Mental Filter‘, and ―Self-Blame‖. Structure Equation Model regarding mediation role of cognitive distortions between negative experiences and academic achievement was finalized by determining model fit indices calculated in SPSS Amos. Developed model is a significant contribution to existing knowledge, which would hopefully serve as assisting theoretical background for educationists, psychologists, teachers and students. It can lead them to identify particular cognitive biases in order to suggest measures for eradication of negative effects from university students.