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International Journal of Agricultural and Biological Engineering 2020年第1期13卷 138-145页

作者： Mazhar Hussain Tunio Jianmin Gao Mashooque ali Talpur Imran ali Lakhiar Farman ali Chandio sher ali shaikh Kashif ali Solangi School of Agricultural Equipment Engineering Jiangsu UniversityZhenjiang 212013China Sindh Agriculture University 70060 Tando JamPakistan

The current rapid increase in irrigation water consumption is considered unsustainable and threatens the world food ***,it is mandatory to promote modern techniques and to manage existing conventional irrigation *** present study was attempted to determine the effects of different irrigation frequencies and rice straw incorporation rates on yield and water productivity of the wheat *** experiment was arranged with randomize complete block design involving nine treatments(RS 0 I 7,RS 0 I 15,RS 0 I 22,RS 1 I 7,RS 1 I 15,RS 1 I 22,RS 2 I 7,RS 2 I 15 and RS 2 I 22)under three *** exposed that the incorporation of rice straw with different irrigation frequencies significantly improved physico-chemical properties of ***,soil bulk density,infiltration rate,pH,electrical conductivity significantly decreased and soil porosity significantly increased under all ***,maximum crop yield and crop water productivity of 7706.4 kg/hm 2 and 1.92 kg/m 3 respectively were found under RS 1 I 15 *** on experimental results it can be concluded that irrigation frequency and incorporation of rice straw had significant effects on the physico-chemical properties of soil,total grain yield and water productivity of the wheat ***,this study suggested that the wheat crop yield and water productivity could be increased by incorporating 1 t/hm 2 rice straw with 15 d of irrigation frequency.

关键词： physico-chemical irrigation frequency rice straw wheat crop water productivity

Influences of moisture content and compressive loading speed on the mechanical properties of maize grain orientations

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International Journal of Agricultural and Biological Engineering 2021年第5期14卷 41-49页

作者： Farman ali Chandio Yaoming Li Zheng Ma Fiaz Ahmad Tabinda Naz Syed sher ali shaikh Mazhar Hussain Tunio School of Agricultural Engineering Jiangsu UniversityZhenjiang 212000JiangsuChina Faculty of Agricultural Engineering Sindh Agriculture UniversityTandojam 70060SindhPakistan College of Engineering Nanjing Agriculture UniversityNanjing 210044China Department of Agricultural Engineering Bahauddin Zakariya UniversityMultan 60800Pakistan

Determination of the mechanical properties(rupture force,deformation,hardness,and toughness)of maize grain could be a significant concern for designing the harvester,thresher,and handling,processing,and storage ***,the present research was conducted to assess the vertical and lateral rupture force,deformation,hardness,and toughness of maize grain(Beijing Denong,Lianchuang,Suyu 20,Liyu 88 and Suyu 29)influenced by different moisture contents(11.2%,17.5%,and 21.3%)and compressive loading speeds(5,10,15,20,and 25 mm/min,respectively).Besides,the mean length,width,thickness,geometric mean diameter,equivalent diameter,arithmetic diameter,sphericity,grain volume,surface area,and aspect ratio of the selected varieties were *** results showed that the highest length,width,thickness and sphericity,grain volume,surface area,and aspect ratio were obtained at moisture of 21.3%,whereas the lowest was at 11.2%.Moreover,it was observed that as increasing the loading speed from 5 to 25 mm/min,the vertical and lateral rupture forces ***,as increasing moisture contents from 11.2%to 21.3%,the vertical and lateral rupture forces,hardness,and toughness decreased ***,the maximum correlation(R2=0.9957)between rupture force and loading speed was found for Liyu 88 at moisture of 17.5%and minimum correlation(R2=0.7002)was found for Suyu 29 at moisture of 11.2%.Moreover,the highest lateral and vertical rupture force was noticed(pshers,and processing machine.

关键词： maize grain moisture content compressive loading speeds mechanical properties orientation

Comparison of nutrient use efficiency,antioxidant assay,and nutritional quality of butter-head lettuce(Lactuca sativa L.)in five cultivation systems

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International Journal of Agricultural and Biological Engineering 2023年第1期16卷 95-103页

作者： Mazhar H.Tunio Jianmin Gao Tarek M.K.Mohamed Fiaz Ahmad Irfan Abbas sher ali shaikh School of Agricultural Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina

A greenhouse experiment was conducted to evaluate the comparison of nutrient use efficiency,antioxidant assay,and nutritional quality of butter-head lettuce in five cultivation *** this experimental study,a split-boxes experimental arrangement in a completely randomized design(CRD)with three aeroponics systems(high pressure(T1),low pressure(T2),and ultrasonic nozzle(T3)),hydroponic system(T4),and conventional cultivation system(T5)was *** analyses of variance(ANOVA)were employed to assess yield,chlorophyll content,relative water content(RWC),nutrient use efficiency(NUE),2,2-Diphenyl-1-picrylhydrazyl(DDPH),Hydrogen Peroxide(H2O2),Ferric Reducing Antioxidant Power(FRAP),total phenolic(TPC),flavonoid content(TFC)and nutritional quality of butter-head *** experimental comparative results indicated that the shoot and root(fresh and dry)weight,root-to-shoot ratio,chlorophyll contents,CWC,NUE,DDPH,H 2O 2,FRAP,TPC,TFC,nitrate,vitamin C,and protein level were significantly(p0.7)among the Shoot(FW),Chlorophyll,RWC,NUE,and among TPC,TFC,DDPH,H 2O 2,and *** study demonstrates that butter-head lettuce grown in aeroponics systems with high-pressure nozzles may serve as a potential dietary source and is rich in natural antioxidants.

关键词： aeroponics high-pressure nozzle phenolic content antioxidants lettuce

Effects of soil mechanical properties on the height and tractive performance of rubber grouser at different moisture contents

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International Journal of Agricultural and Biological Engineering 2022年第6期15卷 31-37页

作者： sher ali shaikh Yaoming Li Zheng Ma Farman ali Chandio Mazhar Hussain Tunio Fiaz Ahmad Kashif ali Solangi School of Agricultural Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina Sindh Agriculture University 70060 Tando JamPakistan Department of Agricultural Engineering Bahauddin Zakariya UniversityMultan 60800Pakistan

Rubber tracked vehicles are commonly used on agricultural machinery that perform agricultural operations such as rice harvesting in soft paddy fields with low bearing *** was carried out to assess the influence of soil moisture content and mechanical properties on the tractive performance of a rubber grouser with three heights(45 mm,55 mm,60 mm).The direct shear test and penetration test were used in this study,which was based on a semi-empirical approach of determining tractive *** shear tests were used to measure soil shear strength parameters such as cohesion,adhesion,internal and exterior friction *** results of the penetration test were used to determine tractive parameters such as soil thrust,running resistance,and traction,for the penetration test,a device was designed and *** experimental results revealed that soil cohesion and adhesion increased linearly with increasing soil moisture content,however adhesion dropped after 30.7%.Similarly,the soil thrust initially increased till 21.5%then ***,running resistance had a decreasing trend over soil moisture content whereas maximum traction achieved for 45 mm grouser height at 21.5%moisture *** was concluded that a rubber grouser with 45 mm height had better traction rather than 55 mm and 60 mm,it can be suitably used for designing a track system for a crawler vehicle(e.g.,harvester)leading to its greater adoption among the farmers.

关键词： soil moisture content traction rubber grouser soil mechanical properties tracked vehicle

Computational Analysis of Surface Pressure Distribution over a 2D Wedge in the Supersonic and Hypersonic Flow Regimes

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Fluid Dynamics & Materials Processing 2023年第6期19卷 1637-1653页

作者： Javed S.shaikh Krishna Kumar Khizar A.Pathan sher A.Khan MIT School of Engineering MIT ADT UniversityPune412201India Trinity College of Engineering and Research Pune411048India Department of Mechanical Engineering International Islamic University MalaysiaKuala Lumpur53100Malaysia

The complex fluid-dynamic instabilities and shock waves occurring along the surface of a two-dimensional wedge at high values of the Mach number are studied here through numerical solution of the governing ***,a regression model is implemented to determine the pressure distribution for various Mach numbers and angles of *** Mach number spans the interval from 1.5 to *** wedge angles(θ)are from 5°to 25°.The pressure ratio(P2/P1)is reported at various locations(x/L)along the 2D *** results of the numerical simulations are compared with the regression model showing good agreement.

关键词： CFD analysis supersonic wedge angle Mach number