Effect of Acid Treatment on the Recovery of Valuable Metals from Steel Plant Exhaust
Pages 323-328
Zeeshan A. Hameed, Junaid Saleem, Hira Lal, Ahsan Abdul Ghani and Muhammad Shoaib
DOI: http://dx.doi.org/10.6000/1927-5129.2016.12.50
Published: 29 July 2016

Abstract: The response of different metals such as Zn, Fe, Pb, Cr and Mn during leaching of Electric Arc Furnace (EAF) dust in acid medium has been investigated. The major proportion of EAF dust constitutes of these metals and their recovery by means of a chemical process is not only economical but also imparts positive impact on the environment. The leaching of metals from dust is achieved using different concentration of sulphuric acid, and the dust samples have been characterized both before and after leaching. Based on the results, several recommendations have been suggested for the optimization of H₂SO₄ concentration,that lead to the maximum recovery of these metals. Under the optimized conditions, it has been determined that the satisfactory leaching yield of Zn (95%) can be obtained at a concentration of 1M.

Impacts Evaluation of Chashma Right Bank Canal on the Water-Table of District Dera Ismail Khan, Pakistan
Pages 289-292
Atta-ur-Rahman, Amir Nawaz Khan, Samiullah, Shehla Gul and Shakeel Mahmood
DOI: http://dx.doi.org/10.6000/1927-5129.2016.12.43
Published: 19 July 2016

Abstract: This paper analyses the impact evaluation of Chashma Right Bank Canal (CRBC) on the water-table of district D.I. Khan, Pakistan. The study area falls in the arid agro-ecological zone of Pakistan. In order to achieve objectives of the study, data were gathered from both primary and secondary sources. Primary data were obtained through a detailed field survey, where five sample villages were also selected by random means for micro-level analysis. Out of which four from CRBC command areas and one village from outside the command area. Data were also collected during focused group discussion with the farmers and elderly people to grasp the ex post impact of CRBC on water-table. In addition to this, pre-CRBC data were obtained from WAPDA. The analysis reveals that in the study area water-table varies from area to area. A large tract of saline groundwater is available in the western section, whereas the eastern section has good quality of freshwater aquifers. After the construction of CRBC, there has been a gradual rise in water-table due to intensive irrigation, introduction of water loving crops, high cropping intensity and unlined irrigation network. The analysis further reveals that in certain areas, the rise in water-table is very alarming. Such threatening situation may encourage waterlogging, soil salinization that may halt agricultural productivity.

Comparative Study on Growth and Conformation of Male Dumbi Lambs under Two Management Systems
Pages 275-280
Huma Rizwana, Faizan Shahani, Rani Abro, Muhammad Naeem, Nasir Rajput, M.I. Memon, S.H. Abro, Hassina Baloch, H.K. Kunbhar, G.A. Mughal and S. Shahzad Ali
DOI: http://dx.doi.org/10.6000/1927-5129.2016.12.42
Published: 20 July 2016

Abstract: A study was carried out on 12 male lambs of Dumbi sheep breed reared under two management systems at theDepartment of Livestock Management Faculty of Animal Husbandry and Veterinary Sciences, Sindh Agriculture University Tando jam. The lambs of Dumbi breed were randomly divided into two groups i.e. group A and B (6 lambs in each group). The group A was reared under semi intensive management system (concentrate and open grazing) whereas animals in group B were kept under intensive management system (concentrate and green fodder). The experiment was lasted for (8) weeks and the observations for body weight and body conformation traits (girth, height and length) were recorded on weekly basis. The result indicated that the average body weight of lambs in group A (12.5 kg) was statistically higher (P<0.05) than lambs in group B (11.33 kg). Moreover, the average body conformation of Dumbi lambs of group A in respect of girth, height and length (56.83 and 40.5 cm, 41.5 cm respectively) were significantly higher than (P<0.05) the male Dumbi lambs of group B (55.33 and 39.33 cm, 40 cm respectively). While comparing the economical aspects of lambs reared under two management systems it was noted that the animals of group A were more economical (Rs.337 /lambs) compared to those of group B (Rs.245 /lambs). Result concludes that, the lambs reared under semi intensive management system (concentrate and open grazing) gained more body weight and body conformation than that of lambs reared under intensive management system (concentrate and green fodder).

Rearing of Adult Green Lacewing, Chrysoperla carnea (Stephens) on Different Artificial Diets in the laboratory
Pages 289-292
Sumera Balouch, Aslam Bukero, Imtiaz Ahmed Nizamani, Muhammad Ismail Kumbhar, Lubna Bashir Rajput, Riaz Ahmed Buriro, Ali Raza Shah, Naeem Ahmed Qureshi, Javaid Ahmed Sheikh, Shahzad Ali Nahiyoon and Zarnain Rajput
DOI: http://dx.doi.org/10.6000/1927-5129.2016.12.44
Published: 20 July 2016

Abstract: A laboratory study was conducted on rearing of adult Green lacewing, Chrysoperla carnea (Stephens) on different artificial diets. Study was conducted under laboratory conditions at Department of Plant Protection, SAU, Tandojam, Sindh, Pakistan during 2013-14 to determined better artificial diet for mass rearing of adult C. carnea. Six diets containing water:honey:yeast i.e., D₁ (20ml:2g:2g), D₂ (20ml:4g:2g), D₃ (20ml:6g:2g), water:sugar:yeast D₄ (20ml:2g:2g), D₅ (20ml:4g:2g), D₆ (20 ml:6g:2g) and two diets containing water:gur:yeast i.e., D₇ (20ml:2g:2g), D₈ (20ml:4g:2g), D₉ (20 ml:6g:2g) were tested. The results showed that maximum pre-oviposition period (11.5 ± 3.95 days) recorded, oviposition period (18.0 ± 0.91 days) and post-oviposition period (5.0 ± 0.71 days) was recorded on D₄, D₉ and D₁, respectively. Minimum pre-oviposition period (7.25 ± 0.25 days), oviposition period (5.0 ± 1.73 days) and post-oviposition period (2.5 ± 0.87 days) was recorded on D₈, D₄, and D₇, respectively. The highest fecundity (342.5 ± 89.55 eggs) was recorded on D₉, whereas the lowest fecundity (42.5 ± 5.48 eggs) was recorded on D₄. The eggs laid by female fed on D₄ took lesser time (1.75 ± 0.66 days) to hatch. Maximum larval and pupal longevity was recorded in larvae of adults fed on D₉. The adults lived longer for 30.0 ± 0.91 days on D₉. The maximum egg hatching (55 %), larval-pupal transformation (45 %) and adults emergence (30 %) was recorded on D_9. It is concluded that D₉ was found the best one for mass rearing of adult C. carnea.