Aladian Election Essay - 1566 Words

Over the recent decades, Canada’s political landscape has undergone several shifts with the 2015 elections taking another new course of government. The 2015 elections market Canada’s 29th general elections following a request of the Jim Prentice to the governor of Alberta to dissolve the legislative assembly in April 2015. Further, this marked the fourth time that the people of Alberta changed their system of government. With reference to the provincial election act, the set election date was set and the people of Alberta were allowed to the polls. This election led to the majority of the progressive conservative associations of Alberta (PCs) losing their positions as several New Democratic Party (NDP) aspirants were elected into the†¦show more content†¦In addition, the texts showed more of betrayal forms some of the officials from the PC party. Consequently, one of the strongest party members, Jonathan Denis, the former justice minister interrupted the campai gns in the attempt to attend to the legal proceedings which involved the separated wife. Opinion Polls Influence From the beginning, the consensus that was conducted among various opinion polls indicated that Alberta was to be an NDP province. There were several pre-election polls conducted in the province all showing the popularity of the pc party. This increased the party’s popularity as compared to other parties that were involved in the race. For instance, CBC polls conducted revealed that Mr. Prentice was first with a 38 percent lead then followed by 24 percent Windrose candidate. Also, when same research was conducted in Calgary, the Alberta’s were asked to give the party with which they were affiliated to. The NDP party came the most popular with a percentage of 28 then followed with Wildrose which had 24% popularity. As such, the statistical research affected the voter behavior in the province. In addition, the opinion polls provided some of the information that were useful for the undecided voters and therefore were observed to have impacted in th e swaying of Alberta’s voters. As such, the provisional conservatives’ party found

The Concept Of Cultural Erasure, Inequality And Violence

Postcolonialism: The Concept of Cultural Erasure, Inequality and Violence Colonization can be dated back to 1492 with the Spanish venture led by Columbus. Colonialism is defined as â€Å"The policy or practice of acquiring full or partial political control over another country, occupying it with settlers, and exploiting it economically† (Oxford Dictionary).This expedition spread European influence worldwide, in places such as China, Lebanon, India, and Antigua. European influence is still prevalent today through the crossing of racial lines and shifting of cultures towards a more ‘civilized’ way of living. Colonialism is still prevalent today, in the form of postcolonialism. Postcolonialism can be defined as America’s benefaction to nations worldwide that include dynamic influences in things such as: government, culture, education and economy. One of the concepts erected from colonialism is globalization. Since globalization is a direct effect of colonial ism, it is no surprise that globalization influences the same categories as postcolonialism (government, culture, education and economy), making the two concepts almost synonymous— with minimal differences. Globalization is defined as the integration of economics and communications of nations through increased contact by technology. Globalization dominates the economic and social side of the field while postcolonialism dwells in the cultural and educational aspects. This European ‘gift’ has contributed to global conflicts,Show MoreRelatedModern Society s Criminal Justice System3383 Words   |  14 Pagesin the government s favour. In a way, the phrase ‘tough on crime’ has become consolidated as one word in our language as political speech deliberately uses it repetitiously. On a metalinguistic level, the phrase ‘tough on crime,’ in relation to cultural behaviours, is used to alleviate of the fear of a disordered society. An utterance which serves a performative function in language and communication in which political figures may utilize security speech acts to obtain certain public responses (HuysmansRead MoreCalculus Oaper13589 Words   |  55 PagesObviously there is a connection here. I believe that much feminist theory and criticism is stranded on this shoal. My organizing impulse is the belief that it is not enough for feminist thought that specifically lesbian texts exist. Any theory or cultural/political creation that treats lesbian existence as a marginal or less natural phenomenon, as mere sexual preference, or as the mirror image of either heterosexual or male homosexual relations is profoundly weakened thereby, whatever its otherRead MoreDeveloping Management Skills404131 Words   |  1617 Pagestheir willingness to share their time with this competing â€Å"labor of love† and to forgive our own gaps between common sense and common practice. David A. Whetten Kim S. Cameron PREFACE xxi This page intentionally left blank MANAGEMENT CONCEPTS ââ€"   ââ€"   ââ€"   ââ€"   ââ€"   ââ€"   ââ€"   ââ€"   ââ€"   ââ€"   ââ€"   ââ€"   ââ€"   The Critical Role of Management Skills The Importance of Competent Managers The Skills of Effective Managers Essential Management Skills What Are Management Skills? Improving Management Skills An Approach to Skill Development

Allelopathy Free Essays

string(51) " with a single row hand drill in rows 30 cm apart\." Allelopathic potential of crop residues for weed management in wheat under semi-arid conditions of Pakistan Muhammad Ashraf Professor of Agronomy, PMAS-Arid Agriculture University, Rawalpindi, Pakistan. drashraf_150@yahoo. com RATIONALE †¢ Rainfed Wheat- Main winter crop grown by about 80% of the farmers on residual soil moisture, received during monsoon1. We will write a custom essay sample on Allelopathy or any similar topic only for you Order Now †¢ Weeds infestation- a major yield reducing factor (25-30%v); †¢ If weeds are controlled, crop yield can be enhanced by about 37%2. 1 Khaliq et al. , 2007) 2 (Bibi et al. , 2005). Cont†¦.. Existing Weed Control systems: †¢ Traditional weed control methods (Hand weeding) are time consuming, weather dependent and labor intensive1 ; + Socio-economic issues:[small land holdings, family size =8, poverty, migration to cities] †¢ Herbicides use is limited in drylands + these are expensive with Environmental hazards2; Reduced Nutritive value of many crops 3 and Herbicide resistance4. 1 (Naveed et al. , 2008) 2 (Mancini et al. , 2008) 3 (Nazarko et al. , 2003). Cont†¦.. †¢ WM programs should focus on environmental safety along with benefits to the farmers. Alternate weed management systems need to be developed aimed to control weeds and raise the income of resource-poor farmers (increased crop yields) without despoiling the natural resource base. ALTERNATE WEED MANAGEMENT OPTIONS †¢ Allelopathy ? a mechanism of plant interference1 is a natural, inexpensive, environmentally safe and an organic approach to control weeds and increase crop yields while cons erving the ecosystem2. †¢ Sorghum is highly allelopathic3 †¢ Sorghum residue may be effectively used to manage some of the important weeds in rainfed wheat without affecting crop in semi-arid environment4. (Weston, 2005) 2 (Inderjit and Duke, 2003) 1 (Weston and Duke, 2003) 2 (Inderjit and Duke, 2003) Cont†¦.. †¢ Water Extracts of different plant parts have different allelopathic potential 1. †¢ Sunflower – possessed weed suppression ability 2 . †¢ The combination of two or more allelopathic aqueous extracts may act synergistically and cause more phyto-toxic effect on weeds 3. †¢ Mixing and applying sunflower and sorghum residue water extract (WE) may increase the spectrum of phytotoxic effects and may result in synergistic phytotoxic influences on weeds growth. 1 (Ben-Hammouda, et al. 001; Chung, et al. , 2003; Roth et al. , 2000) 2 (Bertholdsson, 2004; Singh et al. , 2001 ) 3 (Duke et al. , 2000; Cheema et al. , 2010) Cont†¦.. OBJECTI VES OF RESEARCH Overall objective: Evaluate the use of allelopathic crop residue collected from summer crop plants grown under drought and mineral stress conditions for weed management in wheat in semi-arid areas of Pakistan: Specific Objectives: †¢ Test water extracts (WE)of different plant parts of sorghum residue for weeds suppression in wheat. †¢ Evaluate the effects of sorghum residue mulch and sorghum WE for weed management in wheat. Investigate the influence of sole and combined sorghum and sunflower WE spray on weeds in wheat. EXPERIMENTAL DETAILS †¢ Location: Three experiments were conducted at University Research Farm, PMAS-Arid Agriculture University, Rawalpindi, Pakistan (33o 46 N, 73o 08 E). / / †¢ ~500 m above the sea level †¢ Experimental years: successive Rabi (winter) seasons from 2007-2010. Cont†¦.. †¢ Environmental Characterization: Climate Rainfall and ET o 200 160 Rainfall and ET0 (mm) 160 143 120 ETo 80 40 0 Oct Nov Dec Jan Fe b Mar Apr Rain 140 121 Mean Monthly Rainfall (mm) 20 100 80 67 60 40 26 57 56 Sever Stress Period 27 21 7 15 39 43 20 0 Month Rainfall Distribution (1977-11) Source: Soil and water conservation Research Institute, Chakwal, Pakistan Growing Season Rainfall Period Monthly rain (mm) Oct Nov Dec Jan Feb March April Total 2006-07 2007-08 2008-09 2009-10 Long-term Av. (1977-07) 0 42 30 0 166 147 14 20 7 15 27 39 56 43 Soil characteristics †¢ Rawal soil series (Inceptisol-silty-clay-loam, Typic Ustochrept USDA classification and Calcaric Cambisols FAO classification scheme) with †¢ Organic matter 0. 5%. †¢ pH 7. 40 †¢ Ece 3 dSm-1 Cont†¦.. Weed Flora †¢ Anagallis arvensis L. (Blue pimfernal), †¢ Chenopodium album L. (Lambs quarter), †¢ Fumaria indica L. (Fumitory), †¢ Medicago polymorpha L. (Bur clover) †¢ Avena fatua L. (Wild oat), †¢ Convolvulus arvensis L. (Field bindweed), †¢ Medicago denticulata L. (Denticulate Medick), †¢ Rumex dentatus L. (Toothed dock) and †¢ Melilotus indica L. (Sweet clover) The experimental area was free of noxious and perennial weed species. Treatments (Exp-1) †¢ Control (Un-weeded check) WE: Water extract Hand weeding at 60 days after sowing (DAS) †¢ Herbicide (Logron) @ 250 g ha-1 at 60 DAS †¢ Sorghum root WE spray @ 10 L ha-1 at 60 and 80 DAS †¢ Sorghum stem WE spray @ 10 L ha-1 at 60 and 80 DAS †¢ Sorghum leaf WE spray @ 10 L ha-1 at 60 and 80 DAS †¢ Sorghum stem + root WE @ 5+5 L ha-1 at 60 and 80 DAS †¢ Sorghum stem + leaf WE @ 5+5 L ha-1 at 60 and 80 DAS †¢ Sorghum root + leaf WE @ 5+5 L ha-1 at 60 and 80 DAS Treatments (Exp-2) WE: Water extract †¢ Control (Un-weeded check) †¢ Hand weeding at 50 and 80 DAS †¢ Sorghum mulch @ 5 Mg ha-1 (Soil incorporated) †¢ Sorghum mulch @ 10 Mg ha-1 Soil incorporated) †¢ Sorghum WE @ 10 L ha-1 at 50 DAS. †¢ Sorghum WE @ 10 L ha-1 at 50 and 80 DAS. †¢ Sorgh um WE @ 20 L ha-1 at 50 DAS. †¢ Sorghum WE @ 20 L ha-1 at 50 and 80 DAS Treatments (Exp-3) †¢ Control (Un-weeded check) WE: Water extract †¢ Sunflower WE @ 20 L ha-1 at 50 DAS †¢ Sorghum WE @ 20 L ha-1 at 50 DAS †¢ Sunflower WE + sorghum WE @ 10 +10 L ha-1 at 50 DAS †¢ Sunflower WE @ 20 L ha-1 at 50 and 80 DAS †¢ Sorghum WE @ 20 L ha-1 at 50 and 80 DAS †¢ Sunflower WE + sorghum WE @ 10 + 10 L ha-1 at 50 and 80 DAS Research Methodology: Preparation of water extract †¢ Sunflower and sorghum plants were harvested at maturity, grains were separated and residue was sundried and chaffed with fodder cutter into 2 cm pieces. †¢ Chaffed residue was soaked in de-ionized water in 1:10 (1 kg each of herbage in 10 L of water) in separate containers for 24 h at room temperature to prepare water extract (WE) . †¢ WE from respective containers were obtained by filtering the mixture through a screen. The volume of respective filtrate was reduced twenty times by continuously boiling at 100 0C to prepare water extract (Cheema and Khaliq, 2000). Sowing and cultural practices †¢ Seedbed was prepared by giving four cultivations each followed by planking. †¢ Fertilizer @ 125- kg N and P2O5 ha-1 was applied at the time of seedbed preparation. †¢ Wheat cv. ‘Inqilab-91’ was seeded @125 kg ha-1 was during November with a single row hand drill in rows 30 cm apart. You read "Alle lopathy" in category "Papers" Layout design: RCBD with 4R; Eight rows 30 cm apart per treatment were maintained in plot size of 7. 0 x 2. 4 m. †¢ The wheat variety, sowing time, layout plan and other cultural practices were almost same for every year. Measures: Weeds †¢ Weed density †¢ Weed dry weight (biomass) Wheat †¢ Spike length (cm), †¢ Spikelets spike-1 †¢ Grains spike-1 †¢ Fertile tillers m-2 †¢ 1000-grain weight. Statistical analysis The data were subjected to analysis of variance technique. F-statistic was based on residual mean square error. The LSD at 5% level of probability was used for comparison of treatment means (Montgomery, 2001). RESULTS DISCUSSION Experiment # 1 Phyto-toxic effects of root, stem and leaf water extract of mature sorghum on Weeds density Dry weight Treatments Control (Un-weeded check) Hand weeding at 60 DAS Exp-1 Weed density ( m-2) 80 DAS 105 DAS Weeds dry weight (g m-2) 80 DAS 105 DAS 147 a 79 d (-46*) 132 a 78 f (-41) 36. 7 g (-72) 102 c (-22) 112 b (-15) 113 b (-14 88 e (-33) 94 de (-29) 102 cd (-23) 8. 52 2 a 12 e (-45) 5. 5 f (-75) 18 cd (-16) 20 b (-8) 20 b (-8) 17 d (-22) 17 cd (-20) 19 bc (-14) 1. 54 27 a 17 e (-38) 8. 77 f (-67) 21 c (-21) 24 b (-11) 23 b (-14) 18 e (-34) 20 d (-27) 27 c (-20) 1. 57 Herbicide (Logron) @ 250 g ha-1 34 e (-77) at 60 DAS Sorghum root WE spray @ 10 L 117 c (-21) ha-1 at 60 and 80 DAS Sorghum stem WE spray @ 10 L 129 b (-12) ha-1 at 60 and 80 DAS Sorghum leaf WE spray @ 10 L 127 b (-14) ha-1 at 60 and 80 DAS Sorghum stem + root WE@ 5+5 L 113 c (-23) ha-1 at 60 and 80 DAS Sorghum stem + leaf WE@ 5+5 L 111 c (-24) ha-1 at 60 and 80 DAS Sorghum root + leaf WE @ 5+ 5 121 bc (-18) L ha-1 60 and 80 DAS LSD (0. 05) 10. 41 * Figures in parenthesis show % decrease in weed density/dry weight compared to control. Effect of root, stem and leaf water extract of mature sorghum on yield components and wheat grain yield Treatments Control (Un-weeded check) Tillers (m-2) Spike length (cm) Spikelet # spike-1 Grains # 1000-Grain spike-1 weight (g) Exp-1 Grain yield (T ha-1) 345e Hand weeding at 60 DAS 396b Herbicide (Logron) @ 250 g 427a ha-1 at 60 DAS Sorghum root WE spray @ 10 L ha-1 at 60 and 80 DAS Sorghum stem WE spray @ 10 L ha-1 at 60 and 80 DAS Sorghum leaf WE spray @ 10 L ha-1 at 60 and 80 DAS Sorghum stem + root WE@ 5+5 L ha-1 at 60 and 80 DAS Sorghum stem + leaf WE@ 5+5 L ha-1 at 60 and 80 DAS Sorghum root + leaf WE @ 5+ 5 L ha-1 60 and 80 DAS LSD (0. 05) 9. 0e 10. 3abcd 11. 2a 10. 0bcde 9. 5de 9. 8cde 10. 9 ab 10. abc 10. 7 abc 1. 03 20. 7 21. 0 20. 9 21. 1 20. 5 21. 1 20. 2 21. 0 20. 2 – 41. 7c 47. 3ab 49. 4a 48. 8ab 47. 3ab 46. 1b 49. 0ab 48. 0ab 48. 0ab 3. 04 32. 5e 33. 7d 34. 6bc 35. 6a 33. 6d 33. 1de 36. 0a 33. 9cd 35. 2ab 0. 90 2. 76f 3. 2bc (+18) 3. 5a (+26) 3. 1cde (+12) 3. 0de 2. 9ef (+8) (+6) 365cde 353de 349e 357de 385bc 376bcd 54. 45 3. 3ab (+20) 3. 3abc (+19) 3. 2bcd (+14) 213. 2 * Figures in parenthesis show % decrease in weed density/dry weight compared to control. FINDINGS FROM EXPERIMENT # 1: †¢ Sorghum stem + root WE@ 5+5 L ha-1 at 60 and 80 DAS treatment caused 33% reduction in weed density and dry weight by about; †¢ This reduction was 41% in hand weeding and 72% by the application of Logron @ 250 g ha-1 at 60 DAS †¢ The increase in grain yield in stem + root and stem + leaf WE treatments were statistically same as in hand weeding and herbicide application. Cont†¦.. Experiment # 2 RESULTS DISCUSSION FINDINGS FROM EXPERIMENT # 2: †¢ Data showed that incorporation of sorghum herbage mulch @ 10 Mg ha-1 and twotimes sprays of Sorghum water extract @ 20 L ha-1 at 50 and 80 DAS decreased weeds density by about 42%, and weeds dry weight by 34%, respectively compared to control measured at 95DAS. †¢ Maximum increase (33%) in wheat grain yield was recorded in plots where two times Sorghum WE @ 20 L ha-1 was sprayed at 50 and 80 DAS over control. Cont†¦.. Experiment # 3 RESULTS DISCUSSION FINDING FROM EXPERIMENT # 3: †¢ Sorghum water extract was more effective than sunflower water extract and combination of both these extracts performed better than their sole application. Cont†¦.. CONCLUSION I. Stem + root water extract suppressed weed density by 33% over control i. e. about half of the effects of herbicide â€Å"Logron† application (72%) in wheat. The increase in grain yield in stem + root and stem + leaf WE treatments was statistically at par with hand weeding and herbicide application. Although root WE alone and in combination with stem or leaf WE was more effective in suppressing weeds and improving wheat yields but using whole plant sorghum herbage seems more practicable. II. Incorporation of sorghum herbage mulch @ 10 Mg ha-1 and two times sprays of sorghum WE @ 20 L ha-1 at 50 and 80 DAS decreased weeds density by about 42%, and weeds dry weight by 34%, respectively compared to control measured at 95 DAS. Maximum increase in wheat grain yield by 33% over control was recorded in plots where two times sorghum WE @ 20 L ha-1 was sprayed at 50 and 80 DAS. III. Sorghum WE was more effective than sunflower WE and mixture of sorghum and sunflower reduced weed density and weed dry weight by 27% and 26% over control respectively, and increased wheat yields by 48% over control. RECOMMENDATION †¢ The mixture of preceding allelopathic crop herbage use as mulch or water extract for weed management both for summer and winter crops need to be further investigated under different ecological zones of Pakistan. Muhammad Ashraf Professor of Agronomy drashraf_150@yahoo. com How to cite Allelopathy, Papers

Allelopathy Free Essays

string(51) " with a single row hand drill in rows 30 cm apart\." Allelopathic potential of crop residues for weed management in wheat under semi-arid conditions of Pakistan Muhammad Ashraf Professor of Agronomy, PMAS-Arid Agriculture University, Rawalpindi, Pakistan. drashraf_150@yahoo. com RATIONALE †¢ Rainfed Wheat- Main winter crop grown by about 80% of the farmers on residual soil moisture, received during monsoon1. We will write a custom essay sample on Allelopathy or any similar topic only for you Order Now †¢ Weeds infestation- a major yield reducing factor (25-30%v); †¢ If weeds are controlled, crop yield can be enhanced by about 37%2. 1 Khaliq et al. , 2007) 2 (Bibi et al. , 2005). Cont†¦.. Existing Weed Control systems: †¢ Traditional weed control methods (Hand weeding) are time consuming, weather dependent and labor intensive1 ; + Socio-economic issues:[small land holdings, family size =8, poverty, migration to cities] †¢ Herbicides use is limited in drylands + these are expensive with Environmental hazards2; Reduced Nutritive value of many crops 3 and Herbicide resistance4. 1 (Naveed et al. , 2008) 2 (Mancini et al. , 2008) 3 (Nazarko et al. , 2003). Cont†¦.. †¢ WM programs should focus on environmental safety along with benefits to the farmers. Alternate weed management systems need to be developed aimed to control weeds and raise the income of resource-poor farmers (increased crop yields) without despoiling the natural resource base. ALTERNATE WEED MANAGEMENT OPTIONS †¢ Allelopathy ? a mechanism of plant interference1 is a natural, inexpensive, environmentally safe and an organic approach to control weeds and increase crop yields while cons erving the ecosystem2. †¢ Sorghum is highly allelopathic3 †¢ Sorghum residue may be effectively used to manage some of the important weeds in rainfed wheat without affecting crop in semi-arid environment4. (Weston, 2005) 2 (Inderjit and Duke, 2003) 1 (Weston and Duke, 2003) 2 (Inderjit and Duke, 2003) Cont†¦.. †¢ Water Extracts of different plant parts have different allelopathic potential 1. †¢ Sunflower – possessed weed suppression ability 2 . †¢ The combination of two or more allelopathic aqueous extracts may act synergistically and cause more phyto-toxic effect on weeds 3. †¢ Mixing and applying sunflower and sorghum residue water extract (WE) may increase the spectrum of phytotoxic effects and may result in synergistic phytotoxic influences on weeds growth. 1 (Ben-Hammouda, et al. 001; Chung, et al. , 2003; Roth et al. , 2000) 2 (Bertholdsson, 2004; Singh et al. , 2001 ) 3 (Duke et al. , 2000; Cheema et al. , 2010) Cont†¦.. OBJECTI VES OF RESEARCH Overall objective: Evaluate the use of allelopathic crop residue collected from summer crop plants grown under drought and mineral stress conditions for weed management in wheat in semi-arid areas of Pakistan: Specific Objectives: †¢ Test water extracts (WE)of different plant parts of sorghum residue for weeds suppression in wheat. †¢ Evaluate the effects of sorghum residue mulch and sorghum WE for weed management in wheat. Investigate the influence of sole and combined sorghum and sunflower WE spray on weeds in wheat. EXPERIMENTAL DETAILS †¢ Location: Three experiments were conducted at University Research Farm, PMAS-Arid Agriculture University, Rawalpindi, Pakistan (33o 46 N, 73o 08 E). / / †¢ ~500 m above the sea level †¢ Experimental years: successive Rabi (winter) seasons from 2007-2010. Cont†¦.. †¢ Environmental Characterization: Climate Rainfall and ET o 200 160 Rainfall and ET0 (mm) 160 143 120 ETo 80 40 0 Oct Nov Dec Jan Fe b Mar Apr Rain 140 121 Mean Monthly Rainfall (mm) 20 100 80 67 60 40 26 57 56 Sever Stress Period 27 21 7 15 39 43 20 0 Month Rainfall Distribution (1977-11) Source: Soil and water conservation Research Institute, Chakwal, Pakistan Growing Season Rainfall Period Monthly rain (mm) Oct Nov Dec Jan Feb March April Total 2006-07 2007-08 2008-09 2009-10 Long-term Av. (1977-07) 0 42 30 0 166 147 14 20 7 15 27 39 56 43 Soil characteristics †¢ Rawal soil series (Inceptisol-silty-clay-loam, Typic Ustochrept USDA classification and Calcaric Cambisols FAO classification scheme) with †¢ Organic matter 0. 5%. †¢ pH 7. 40 †¢ Ece 3 dSm-1 Cont†¦.. Weed Flora †¢ Anagallis arvensis L. (Blue pimfernal), †¢ Chenopodium album L. (Lambs quarter), †¢ Fumaria indica L. (Fumitory), †¢ Medicago polymorpha L. (Bur clover) †¢ Avena fatua L. (Wild oat), †¢ Convolvulus arvensis L. (Field bindweed), †¢ Medicago denticulata L. (Denticulate Medick), †¢ Rumex dentatus L. (Toothed dock) and †¢ Melilotus indica L. (Sweet clover) The experimental area was free of noxious and perennial weed species. Treatments (Exp-1) †¢ Control (Un-weeded check) WE: Water extract Hand weeding at 60 days after sowing (DAS) †¢ Herbicide (Logron) @ 250 g ha-1 at 60 DAS †¢ Sorghum root WE spray @ 10 L ha-1 at 60 and 80 DAS †¢ Sorghum stem WE spray @ 10 L ha-1 at 60 and 80 DAS †¢ Sorghum leaf WE spray @ 10 L ha-1 at 60 and 80 DAS †¢ Sorghum stem + root WE @ 5+5 L ha-1 at 60 and 80 DAS †¢ Sorghum stem + leaf WE @ 5+5 L ha-1 at 60 and 80 DAS †¢ Sorghum root + leaf WE @ 5+5 L ha-1 at 60 and 80 DAS Treatments (Exp-2) WE: Water extract †¢ Control (Un-weeded check) †¢ Hand weeding at 50 and 80 DAS †¢ Sorghum mulch @ 5 Mg ha-1 (Soil incorporated) †¢ Sorghum mulch @ 10 Mg ha-1 Soil incorporated) †¢ Sorghum WE @ 10 L ha-1 at 50 DAS. †¢ Sorghum WE @ 10 L ha-1 at 50 and 80 DAS. †¢ Sorgh um WE @ 20 L ha-1 at 50 DAS. †¢ Sorghum WE @ 20 L ha-1 at 50 and 80 DAS Treatments (Exp-3) †¢ Control (Un-weeded check) WE: Water extract †¢ Sunflower WE @ 20 L ha-1 at 50 DAS †¢ Sorghum WE @ 20 L ha-1 at 50 DAS †¢ Sunflower WE + sorghum WE @ 10 +10 L ha-1 at 50 DAS †¢ Sunflower WE @ 20 L ha-1 at 50 and 80 DAS †¢ Sorghum WE @ 20 L ha-1 at 50 and 80 DAS †¢ Sunflower WE + sorghum WE @ 10 + 10 L ha-1 at 50 and 80 DAS Research Methodology: Preparation of water extract †¢ Sunflower and sorghum plants were harvested at maturity, grains were separated and residue was sundried and chaffed with fodder cutter into 2 cm pieces. †¢ Chaffed residue was soaked in de-ionized water in 1:10 (1 kg each of herbage in 10 L of water) in separate containers for 24 h at room temperature to prepare water extract (WE) . †¢ WE from respective containers were obtained by filtering the mixture through a screen. The volume of respective filtrate was reduced twenty times by continuously boiling at 100 0C to prepare water extract (Cheema and Khaliq, 2000). Sowing and cultural practices †¢ Seedbed was prepared by giving four cultivations each followed by planking. †¢ Fertilizer @ 125- kg N and P2O5 ha-1 was applied at the time of seedbed preparation. †¢ Wheat cv. ‘Inqilab-91’ was seeded @125 kg ha-1 was during November with a single row hand drill in rows 30 cm apart. You read "Alle lopathy" in category "Papers" Layout design: RCBD with 4R; Eight rows 30 cm apart per treatment were maintained in plot size of 7. 0 x 2. 4 m. †¢ The wheat variety, sowing time, layout plan and other cultural practices were almost same for every year. Measures: Weeds †¢ Weed density †¢ Weed dry weight (biomass) Wheat †¢ Spike length (cm), †¢ Spikelets spike-1 †¢ Grains spike-1 †¢ Fertile tillers m-2 †¢ 1000-grain weight. Statistical analysis The data were subjected to analysis of variance technique. F-statistic was based on residual mean square error. The LSD at 5% level of probability was used for comparison of treatment means (Montgomery, 2001). RESULTS DISCUSSION Experiment # 1 Phyto-toxic effects of root, stem and leaf water extract of mature sorghum on Weeds density Dry weight Treatments Control (Un-weeded check) Hand weeding at 60 DAS Exp-1 Weed density ( m-2) 80 DAS 105 DAS Weeds dry weight (g m-2) 80 DAS 105 DAS 147 a 79 d (-46*) 132 a 78 f (-41) 36. 7 g (-72) 102 c (-22) 112 b (-15) 113 b (-14 88 e (-33) 94 de (-29) 102 cd (-23) 8. 52 2 a 12 e (-45) 5. 5 f (-75) 18 cd (-16) 20 b (-8) 20 b (-8) 17 d (-22) 17 cd (-20) 19 bc (-14) 1. 54 27 a 17 e (-38) 8. 77 f (-67) 21 c (-21) 24 b (-11) 23 b (-14) 18 e (-34) 20 d (-27) 27 c (-20) 1. 57 Herbicide (Logron) @ 250 g ha-1 34 e (-77) at 60 DAS Sorghum root WE spray @ 10 L 117 c (-21) ha-1 at 60 and 80 DAS Sorghum stem WE spray @ 10 L 129 b (-12) ha-1 at 60 and 80 DAS Sorghum leaf WE spray @ 10 L 127 b (-14) ha-1 at 60 and 80 DAS Sorghum stem + root WE@ 5+5 L 113 c (-23) ha-1 at 60 and 80 DAS Sorghum stem + leaf WE@ 5+5 L 111 c (-24) ha-1 at 60 and 80 DAS Sorghum root + leaf WE @ 5+ 5 121 bc (-18) L ha-1 60 and 80 DAS LSD (0. 05) 10. 41 * Figures in parenthesis show % decrease in weed density/dry weight compared to control. Effect of root, stem and leaf water extract of mature sorghum on yield components and wheat grain yield Treatments Control (Un-weeded check) Tillers (m-2) Spike length (cm) Spikelet # spike-1 Grains # 1000-Grain spike-1 weight (g) Exp-1 Grain yield (T ha-1) 345e Hand weeding at 60 DAS 396b Herbicide (Logron) @ 250 g 427a ha-1 at 60 DAS Sorghum root WE spray @ 10 L ha-1 at 60 and 80 DAS Sorghum stem WE spray @ 10 L ha-1 at 60 and 80 DAS Sorghum leaf WE spray @ 10 L ha-1 at 60 and 80 DAS Sorghum stem + root WE@ 5+5 L ha-1 at 60 and 80 DAS Sorghum stem + leaf WE@ 5+5 L ha-1 at 60 and 80 DAS Sorghum root + leaf WE @ 5+ 5 L ha-1 60 and 80 DAS LSD (0. 05) 9. 0e 10. 3abcd 11. 2a 10. 0bcde 9. 5de 9. 8cde 10. 9 ab 10. abc 10. 7 abc 1. 03 20. 7 21. 0 20. 9 21. 1 20. 5 21. 1 20. 2 21. 0 20. 2 – 41. 7c 47. 3ab 49. 4a 48. 8ab 47. 3ab 46. 1b 49. 0ab 48. 0ab 48. 0ab 3. 04 32. 5e 33. 7d 34. 6bc 35. 6a 33. 6d 33. 1de 36. 0a 33. 9cd 35. 2ab 0. 90 2. 76f 3. 2bc (+18) 3. 5a (+26) 3. 1cde (+12) 3. 0de 2. 9ef (+8) (+6) 365cde 353de 349e 357de 385bc 376bcd 54. 45 3. 3ab (+20) 3. 3abc (+19) 3. 2bcd (+14) 213. 2 * Figures in parenthesis show % decrease in weed density/dry weight compared to control. FINDINGS FROM EXPERIMENT # 1: †¢ Sorghum stem + root WE@ 5+5 L ha-1 at 60 and 80 DAS treatment caused 33% reduction in weed density and dry weight by about; †¢ This reduction was 41% in hand weeding and 72% by the application of Logron @ 250 g ha-1 at 60 DAS †¢ The increase in grain yield in stem + root and stem + leaf WE treatments were statistically same as in hand weeding and herbicide application. Cont†¦.. Experiment # 2 RESULTS DISCUSSION FINDINGS FROM EXPERIMENT # 2: †¢ Data showed that incorporation of sorghum herbage mulch @ 10 Mg ha-1 and twotimes sprays of Sorghum water extract @ 20 L ha-1 at 50 and 80 DAS decreased weeds density by about 42%, and weeds dry weight by 34%, respectively compared to control measured at 95DAS. †¢ Maximum increase (33%) in wheat grain yield was recorded in plots where two times Sorghum WE @ 20 L ha-1 was sprayed at 50 and 80 DAS over control. Cont†¦.. Experiment # 3 RESULTS DISCUSSION FINDING FROM EXPERIMENT # 3: †¢ Sorghum water extract was more effective than sunflower water extract and combination of both these extracts performed better than their sole application. Cont†¦.. CONCLUSION I. Stem + root water extract suppressed weed density by 33% over control i. e. about half of the effects of herbicide â€Å"Logron† application (72%) in wheat. The increase in grain yield in stem + root and stem + leaf WE treatments was statistically at par with hand weeding and herbicide application. Although root WE alone and in combination with stem or leaf WE was more effective in suppressing weeds and improving wheat yields but using whole plant sorghum herbage seems more practicable. II. Incorporation of sorghum herbage mulch @ 10 Mg ha-1 and two times sprays of sorghum WE @ 20 L ha-1 at 50 and 80 DAS decreased weeds density by about 42%, and weeds dry weight by 34%, respectively compared to control measured at 95 DAS. Maximum increase in wheat grain yield by 33% over control was recorded in plots where two times sorghum WE @ 20 L ha-1 was sprayed at 50 and 80 DAS. III. Sorghum WE was more effective than sunflower WE and mixture of sorghum and sunflower reduced weed density and weed dry weight by 27% and 26% over control respectively, and increased wheat yields by 48% over control. RECOMMENDATION †¢ The mixture of preceding allelopathic crop herbage use as mulch or water extract for weed management both for summer and winter crops need to be further investigated under different ecological zones of Pakistan. Muhammad Ashraf Professor of Agronomy drashraf_150@yahoo. com How to cite Allelopathy, Papers