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Home > The Impacts of Different Land Uses on Sediment Yield in Dharabi Watershed Chakwal, Pakistan

The Impacts of Different Land Uses on Sediment Yield in Dharabi Watershed Chakwal, Pakistan

Thesis Info

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Author

Iqbal, Muhammad Nadeem

Program

PhD

Institute

Pir Mehr Ali Shah Arid Agriculture University

City

Rawalpindi

Province

Punjab

Country

Pakistan

Thesis Completing Year

2015

Thesis Completion Status

Completed

Subject

Applied Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/6854/1/Muhammad_Nadeem_Iqbal_Soil_Science_PMAS_2015_13.02.2016.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727582389

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Soil is vulnerable to degradation through deforestation, desertification, salinization, overgrazing and soil erosion. Water erosion causing factors are slope, rainfall, soil type, plant cover, runoff and lack of soil conservation techniques. Present study was carried out in the Dharabi watershed (196 km2) in Chakwal district of Pakistan, where high intensity rainstorms (especially during summer) cause most of the erosion. First part compared the sediment yield from gully and terraced gully land use systems in two pairs of small catchments,-one at Rahna Sadaat and the other at Thoa Bahadar. In each pair, gully system was adjacent to the terraced gully system. Instruments (recording rainguage and water level recorder) were installed to monitor the runoff and sediment yield from all the catchments. Data of soil, land use and vegetation cover were recorded. During three years (2009, 2010, 2011), the sites received 547, 725 and 686 mm rainfall, respectively with corresponding Gumbel probability of exceedance as 0.67, 0.30 and 0.44. In 2010 and 2011, the terraced gully system produced almost 70 per cent lower average sediment yield as compared to gully system. Number of runoff events and runoff coefficient were lower in terrace system. The terraced system produced 64 per cent and 74 per cent lower sediment bound organic carbon losses at two sites with the largest amount of 88.4 kg ha⁻1 from gully catchment. At Rahna Sadaat, average annual loss of sediment bound nitrogen from Terrace-I was 2.5 times lower than from adjacent Gully-I. Loss of available phosphorus was also lower (<1 kg ha⁻1) due to lower content in the soils. Similar results were observed for loss of sediment bound available potassium at this site. Here, terraced catchment decreased annual average loss of extractable K by 3.5 times (0.29 kg xvi ha⁻1 as compared to 1.01 kg ha⁻1 from the gully catchment) during 2010-2011. In the second part, soil erosion plots were established. Soil loss from a cultivated slope on a terrace and an undisturbed slope with natural cover was evaluated to ascertain the impact of cultivation of slopes already converted into terraces. A relatively steep slope (11.2 per cent) and a gentle slope (6.1 per cent) with natural vegetation were compared with a gentle slope (5.8 per cent) on cultivated terrace with existing cropping pattern. Cultivated slope produced the highest (8.96 Mg ha⁻1) soil loss annually as compared to the other undisturbed gentle and steep slopes, viz., 2.08 and 4.66 Mg ha⁻1, respectively. This suggests that a cultivated field on terrace generate more soil loss compared to an undisturbed slope with natural vegetation having similar or higher slope gradient of 11 per cent. It is concluded from the results that the use of a terraced gully system is helpful in reducing losses of sediments and adsorbed nutrients to the reservoir. On the other hand, cultivation on converted sloping terraces increases the soil loss at plot scale. Findings of this study could help making policy decisions regarding the land use change and its downstream impacts.
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جسٹس بشیر احمد سعید

جسٹس بشیر احمد سعید
افسوس ہے چند ماہ ہوئے جسٹس بشیر احمد سعید صاحب کابھی کم وبیش ۸۴ برس کی عمر میں دل کا دورہ پڑنے سے ان کے وطن مدراس میں انتقال ہوگیا۔ مرحوم بڑے فعال ومتحرک اورسرگرم وپُرجوش مسلمان تھے انہوں نے مسلمانوں کی تعلیمی ترقی کے لیے مدراس میں وہی کیا جوڈاکٹر عبدالغفور نے کیرالا میں کیا تھا، ’’جنوبی ہند کے مسلمانوں کی تعلیمی انجمن‘‘کے صدر کی حیثیت سے انہوں نے مدراس میں دو عظیم الشان کالج تعمیر کرائے ایک لڑکوں کے لیے اوردوسرا لڑکیوں کے لیے، آج یہ دونوں کالج مدراس یونیورسٹی کے نمایاں اورترقی یافتہ کالج سمجھے جاتے ہیں۔
مرحوم آل انڈیا شخصیت کے بزرگ تھے، سالہا سال وہ علی گڑھ یونیورسٹی کی مرکز کونسل اور کورٹ کے نہایت بااثر اورفعال ممبر رہے، آل انڈیا مسلم مجلس مشاورت اورآل انڈیا مسلم پرسنل لابورڈ دونوں کے سرگرم رکن تھے۔ سرکاری ملازمت سے سبکدوشی کے بعد ان کے شب و روز قومی کاموں میں ہی بسر ہوتے تھے۔ نماز،روزہ کے بڑے پابند،قرآن مجید کی تلاوت ان کے مشاغل یومیہ میں شامل، ندوۃ المصنفین کے شروع سے معاون تھے، برہان بڑے شوق سے پڑھتے اوراس کی بڑی قدر کرتے تھے، غرض کہ بڑی خوبیوں اوراعلیٰ اخلاق و صفات کے بزرگ تھے۔ حق گوئی اورحق پژوہی ان کاجوہر فطری تھا، انگریزی کے بڑے اچھے مقرر تھے، اردو میں بھی اظہار مدعاپر قادر تھے، تقریر بڑے جوشیلے انداز میں کرتے تھے۔ اس میں شک نہیں کہ ان کا نفس وجود مسلمانوں کے لیے بڑی تقویت کاسبب تھا کیونکہ وہ قانون دان بھی تھے اورمسلمانوں کے سچے ترجمان ووکیل بھی۔ [جولائی۱۹۸۴ء]

 

امام محمد اور ان کی قرآن فہمی

If any nation has right to be proud of its inheritance of concern and religion so followers of Islam deserve of its glorious inheritance of concern or concentration which is according to international investment enlists the unique and individual employment in the history of human. Its infrastructure, core concern, flexibility, exclusive law ideology, judiciary, common and uncommon solution contains unique supremacy. The base of such amazing and awesome international investment depends on fundamental legislative of Quran. Therefore, such accumulated ideology of all investment, although having opposition and distance owes the struggle and efforts of plenty of religious scholars (Fuqha) who proved surpassing sincerity for the services of knowledge. Imam Muhammad Bin Hassan Shebani the first of these (Fiqah People)eligious scholars who compressed (Islamic Fiqah) Islamic scholars teaching in such an educational way as none of other did it. He left us such a memorable priceless and valuable inheritance which crystal clear proof that he was having the thoughtful legislative mind and had profuse passion of gaining knowledge though he faced massive difficulties even spent his money to acquire knowledge. Besides such prestige and wisdom he was well-versed in Fiqah (deep thinking). His knowledge and services of Fiqah can be manipulated by his figurative and descriptive books which are real assets and fundamental ideology of followers of Imam Abu Abdullah Muhammad bin alhasan alshaibai recently in the explanation ofKitab ullah Imam Muhammad was not uncommon writer that is why he was as much famous but Imam Muhammad was supposed to be best scholar of it.

Response of Maize to Phosphorus Seed Priming

A series of laboratory and field experiments were conducted to study the effect of phosphorus seed priming on emergence, seedling growth and yield of Maize (Zea mays L.) cv. Azam at the University of Agriculture, Peshawar, Agricultural Research Institute, Tarnab and Bangor University, Wales, UK during 2008 and 2009. Different sources of phosphorus (1 % P) including KH 2 PO 4 , SSP and DAP along with amended solutions of SSP (20 g l -1 KOH, 15 g l -1 NaOH and 12.5 g l -1 Na 2 CO 3 ) were used as priming treatments. Water primed and dry seed were used as control in the experiments. Seeds were primed for 16 h and then air- dried were sown in the mini plot and field for the seedling growth parameters and yield components. Seedlings from mini plot and field were cut at 21 days old stage. Laboratory tests were carried out on the P primed seeds labeled with P 33 to determine the amount of nutrient introgressed into and onto the seed. Germination test of water, P primed and non-primed seed was carried out in low P soil. P 33 labeled primed seeds were planted in tube pots to assess the P mobilization in seedling at three growth stages (7 days after emergence, 14 days after emergence and 21 days after emergence). Phosphorus priming of maize seed for 16 h reduced the time for germination. Three weeks old mini plot and field seedling grown from water, P or P amended solution primed seeds showed higher vigor than unprimed seeds as reflected in fresh and dry shoot weights, fresh shoot height and P shoot content as compared with non-primed seedlings. Additionally the nutrient uptake of seedling was increased due to 1 % P solution priming with KH 2 PO 4 . The seeds primed with P 33 labeled solutions (KH 2 PO 4 ,SSP, and SSP+20 g l -1 KOH) were also used to study the P mobilization in the seedling on three different stages (7 DAE, 14 DAE and 21 DAE) using tube pots. Leaf and root P data showed that phosphorus was effectively mobilized inside the plant due to priming on low P soil and hence helped in reducing the P deficiency in maize to some extent. Data for nutrient introgression by seed revealed that maize seed had introgressed significant amount of P through priming. Also that surface washing of the primed seed only removed 29 % of P from the seed coat. Yield parameters showed positive response to P priming as reflected in cobs yield (126% increased over control), grain and straw yields (85 % and 94% increase over control, respectively), thousand grain weight and P content of grain. Priming maize with SSP + 20 g l -1 KOH showed almost same effect as of KH 2 PO 4 . It was concluded that priming maize with SSP + 20 g l -1 KOH would be effective alternative of KH 2 PO 4 as SSP is generally used fertilizer and KOH is also easily available. This would be easier and cheaper source of priming for resource-poor farmers.