Amer Najat Najmaldeen Kakahy

@uokirkuk.edu.iq

Head of Dep. of Mechanization & Agricultural Equipments/ College of Agriculture/Al- Hawija
University of Kirkuk/College of Agriculture/Al- Hawija/ Dep. of Mechanization & Agricultural Equipments

Amer Najat Najmaldeen Kakahy


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RESEARCH INTERESTS

Mechanization & Agricultural Equipments
13

Scopus Publications

145

Scholar Citations

7

Scholar h-index

4

Scholar i10-index

Scopus Publications

  • Effect of Feeding Rate and Speed on The Productivity of Corn Sheller
    Amer N. N. Kakahy, Rawezh D. Sidiq, Mariya M. Abdullah, Ekhlas T. Mahmood
    Basrah Journal of Agricultural Sciences, 2025
    The effect of feed rate and rotation speed on the productivity of corn shellers was studied in the laboratory of the Hawija Faculty of Agriculture, University of Kirkuk. Two feed rates (1.2 and 2.0 kg) and three rotation speeds (1500, 1700, and 2000 rpm) were recurrent for each treatment. The Randomized Complete Block Design (RCBD) was used to analyze the results. Feed rates, sheller speed, and their interaction had significant effects on all studied parameter, except the interaction between feed rate and sheller speed, which showed no significant effect on cob weight or kernel weight. The second feed rate, the third sheller speed, and their interaction gave the highest Shelled Corn Grains Weighs of 1239.44, 1019.67, and 1291.33 g, respectively. While the best results for, cob weight, kernel weight, and fine material were at the first feeding rate and first sheller speed, which were (1239.44, 2.42, and 0.41) g, and (592.33, 1.87, and 0.30) g, respectively.
  • Numerical Study of an Improved Non-Circular MC Fuelled with H/Air for Thermo-Photovoltaic (TPV) Applications
    Kakei A. Ayad, Abdolbaqi Mohammed Khdher, Kamal Jalal Tawfeeq Albazzaz, Amer Najat Najmaldeen Kakahy, Ali Hussein Abdulkarim, Jayantha Epaarachchi
    Mathematical Modelling of Engineering Problems, 2022
    In recent years, researchers have paid special attention to wall uniformity temperature and improvement in a micro-combustor (MC) for applications as thermos-photovoltaic (TPV) since they have a direct influence on feasibility and efficiency of the required conversion of energy. Numerous experimentation and numerical studies in the field of micro-combustion have been carried out and published in this respect. This study focuses on the flame and flow behaviour in an improved MC. Utilizing the famous approach of fluid dynamics being computational (CFD), the impact of geometrical flow parameters behaviour and temperature of wall is explored and measured. The generated model is being used to evaluate the effects of Hydrogen (H) mass flow rate (MFR) and H/air equivalency ratios on the flame pattern and outer temperature of wall of conventional and enhanced MCs. Moreover, the influence of various MC cross sections (CS), such as square, circular, and flat, on temperature of wall is examined. The findings reveal that when the MFR rises, the wall outside temperature rises as well. The MC with flat cross-sections (CSs) is found to be more effective in terms of power of emitter and efficiency of emitter.
  • The Impact of Forward Tractor Speed and Depth of Ploughing in Some Soil Physical Properties
    A. N. N. Kakahy, W. F. A. Alshamary, A. A. Kakei
    Iop Conference Series Earth and Environmental Science, 2021
    An experiment was carried out at the Agricultural Research and Experiments Station in the Sayyada Region of the College of Agriculture - University of Kirkuk, in order to study the effect of forward tractor speed and depth of ploughing in some technical indicators and physical properties of soil in Loam soils in 2019. Two factors were studied, depths of ploughing (4.63 and 6.30 cm) and the practical speed of the tractor (1.72 and 2.86 km hour-1) and their effect on some of the studied technical indicators, including the practical and theoretical field capacity, the slide percentage, the percentage of porosity, the volume of disturbed soil, the soil particles with less than 5 cm in diameter (5 cm m-2) and practical productivity. The experiment was carried out using the factorial experiment method according to The Randomized Complete Block Design (RCBD) with three replicates. The second speed of the tractor and the second ploughing depth exceeded in achieving the highest rate in practical field capacity of (0.28 and 0.34 ha h-1) and theoretical field capacity (0.41 and 0.49 ha h-1), respectively, and in giving the highest volume of the disturbed soil that were (184.48 and 244.753 m3 h-1) and practical productivity (0.33 and 0.39 ha h-1), respectively. While the lowest rate was in the percentage of slide of the first speed and the depth of the first ploughing (7.56 And 6.31%), respectively.The interference between the second tractor speed and the second ploughing depth was superior in achieving the highest rate in the practical and theoretical field capacity of (0.35 and 0.50 ha h-2) and the highest volume of the disturbed soil and practical productivity reached (254.02 m3 h-2 and 0.40 ha. h-2), respectively. The interference between the tractor first speed and the first ploughing depth exceeded the achievement of the lowest rate in the percentage of slide (3.36%).
  • Effect of planting distances and varieties on the yield of three cucumber hybrids (Cucumis sativus L.) using drip irrigation under protected cultivation conditions
    Amer N. N. Kakahy, Wael F. A. AL Shamary, Ayad A. Kakei
    Iop Conference Series Earth and Environmental Science, 2021
    Abstract A field experiment was carried out in one of the plastic houses of the College of Agriculture, University of Kirkuk during the 2018-2019 agricultural season, to study the effect of three cultivation distances and three cucumber hybrids Cucumis sativus L. hybrids and their interaction on some of the characteristics of the cucumber plant using the drip irrigation system under protected cultivation conditions. The experiment included 18 treatments that consisted of matching three hybrids of cucumber (FAEQ F1, DALIA F1, and BARQ F1) with three distances between plants (40, 30, 20) cm. A factorial experiment was carried out according to the design of randomized complete sectors (R.C.B.D) and by the split plates method and with three replications. The significance of differences between the averages was tested according to the least significant difference L.S.D. between the arithmetic means and at a probability level p < 0.01 and p < 0.05. The results showed the significant effect of most of the studied treatments. It gave the highest significant value for the treatment of interaction between cucumber varieties and the interaction between V 3 D 1 and V 3 D 2 in characteristics of plant height and percentage chlorophyll in the plant, which reached (3.197 m plant −1 and 57.283%), respectively.
  • The Effect of Drip Irrigation, Plant Spacing and Chemical Fertilizers on Some Characteristics of Eggplant Solanum melongena L. Grown inside A greenhouse
    Amer N. N. Kakahy, Wael F. A. Alshamary
    Iop Conference Series Earth and Environmental Science, 2020
    The experiment was conducted at the College of Agriculture - University of Kirkuk during the growing season 2016-2017 on the hybrid eggplant (Solanum melongena L.) category Balcan F1, to study the effect of distances of plants and the concentrations of chemical fertilization and interaction between some of the growth and yield using drip irrigation system grown under greenhouse conditions. The experiment included 18 treatments of a consensus between three planting distances (20.30, 40 cm) with three concentrations of fertilizer trio (16.6, 20.8, 25 g plant−1) given in two batches. The experiment carried out according to the design of randomized complete sectors (R.C.B.D.) as Split- Split plot method and three replicates and tested the differences between the averages, according to the least significant difference test L.S.D. The results showed significant influence at the level of p< 0.01 and p< 0.05 for the treatment of interactions between the interlayer distance and concentrations of fertilizer D1C1 (20 cm and 16.8 g plant−1) highest averages for most of the traits (plant height, branches, early yield of plant, total yield of plant) of (62.577 cm plant−1, 6.56 branch plant−1, and 2.098 kg plant−1 and 4.69 kg plant−1), respectively. However, the treatments D1C2 and D2C1 gave a highest value of chlorophyll ratio in the plant and the total number of leaves reached (54.26 % and 93.78 leaves plant−1), respectively.
  • The effects of different spreader rates and fertilizer types on grain yields of barley (Hordeum vulgare L.)
    A.N.N Kakahy, D. Ahmad, M.D. Akhir, A. Hashemi
    Food Research, 2019
    Kakahy, A.N.N. Ahmad, D., Akhir, M.D. and Hashemi, A. Department of Horticulture, Faculty of Agriculture, University of Kirkuk, Kirkuk, Iraq. Department of Biological and Agricultural Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia. Mechanization and Automation Research Center, MARDI, 43400 UPM Serdang, Selangor, Malaysia. Department of Horticulture. Faculty of Agriculture and Natural Resources, Persian Gulf University. Bushehr, Iran.
  • Effects of knife shapes and cutting speeds of a mower on the power consumption for pulverizing sweet potato vine
    Amer N.N. Kakahy, D. Ahmad, M.D. Akhir, S. Sulaiman, A. Ishak
    Key Engineering Materials, 2014
    Two different shapes of knives (L and Y-shaped) for the rotary slasher with 300 knife cutting angle at three cutting speeds (1830, 2066 and 2044 rpm) were used to indicate their effects on the power consumption for pulverizing sweet potato vine which passed through the sieve (&lt; 28 mm2). The results indicated that all the treatments were significant at p 0.01 significance level for the power consumption on sweet potato vine pulverizing. The best result was recorded from L-shaped knife with a power consumption of 52.12 Watts for sweet potato vine pulverization. Meanwhile, the best result was for the mower speed at 1830 rpm with the lowest power consumption of 61.23 Watts. The best performance for interaction between knife shapes and the cutting speeds was achieved by the L-shaped knife at 1830 rpm with lowest power consumption of 50.23 Watts at p 0.01.
  • Pulverization of sweet potato vine at different mower speeds
    Amer N N Kakahy, D Ahmad, M D Akhir, S Sulaiman, A Ishak
    Iop Conference Series Materials Science and Engineering, 2013
    The effects of different mower speeds (2358, 2440 and 2553 rpm) and different knife angles (30?, 40? and 50?) on sweet potato vine pulverization were studied. The results indicated that all the treatments were significant at p < 0.05 and p < 0.01 significance level for the pulverized percentage of sweet potato vine. The 30? knife angle gave the best result with highest vine pulverized percentage of 54.60 %, and a mower speed of 2553 rpm had the finest vine pulverized percentage of 46.99 %. The best performance for interaction effect between knife angle and speed of mower was achieved by the 30? knife angle and a mower speed of 2440 rpm resulting in an average percentage of 61.27% of pulverized vine.
  • A study on the effects of planting distance on yield of broad beans (Vicia faba L.) under drip irrigation system
    Amer N. N. Kakahy, D. Ahmad, A. Abdullahi
    Acta Horticulturae, 2013
  • Effects of knife shapes and cutting speeds of a mower on the percentage pulverization of sweet potato vine
    Amer N.N. Kakahy, D. Ahmad, MD. Akhir, S. Sulaiman, A. Ishak
    Applied Mechanics and Materials, 2013
    The effects of a rotary slasher with two different shapes of knives (L and Y-shaped) at three cutting speeds (1830, 2066 and 2044 rpm) were studied on percentage of pulverization of sweet potato vine passing through the sieve (&lt; 28 mm2). The results showed that all the treatments were significant at p 0.05 and p 0.01 significance level. The best result was by Y-shaped knife with highest vine pulverized percentage of 82.76 % and a mower speed of 2440 rpm had the finest vine pulverized percentage of 90.48 %. The best performance for interaction effects between knife shapes and speeds of mower was achieved by the Y-shaped knife and a mower speed of 2440 rpm resulting in an average percentage of 92.62 % of pulverized vine.
  • Effects of cutting speeds and moisture content on grass chopping (Pulverizing)
    Amer N. N. Kakahy, D. Ahmad, M. D. Akhir, S. Sulaiman, A. Ishak
    Advanced Science Letters, 2013
  • Effects of feeding angles and cutting speeds of a mower knife with serrated edges on the pulverization of sweet potato vines
    Amer N.N. Kakahy, D. Ahmad, M.D. Akhir, Shamsuddin Sulaiman, A. Ishak
    Advanced Materials Research, 2013
  • Design and development of an Integrated Slasher (Pulverizer) for sweet potato harvester: A review
    Amer N N Kakahy, D Ahmad, M D Akhir, A Ishak, S Sulaiman
    Iop Conference Series Materials Science and Engineering, 2012

RECENT SCHOLAR PUBLICATIONS

  • Impact of Wood Species and Chainsaw Speed on the Noise Level of Electric Chainsaws
    A Kakahy, A Kakei, O Hasan
    European Journal of Forest Engineering, 1-6 , 2026
    2026
  • ECONOMIC AND TECHNICAL ANALYSIS OF SOLAR ENERGY UTILIZATION
    A Kakahy, OH Mohammad, AA Kakei, HM Alhamdany
    Türkiye Mesleki ve Sosyal Bilimler Dergisi 8 , 2026
    2026
  • The Impact of Grain Type and Sieve Holes on some Hammer Mill Performance Measures
    ANN Kakahy, OH Mohammad, HS Ahmed, AA Kakei, HMM Alhamdany, ...
    American Journal Of Botany And Bioengineering 3 (4), 78-85 , 2026
    2026
  • Robotic Milking Systems: A Review
    ANN Kakahy, RD Sidiq, NM Ghazi, OH Mohammad, HM Alhamdany
    2026
  • Effect of Feeding Rate and Speed on The Productivity of Corn Sheller
    ANN Kakahy, RD Sidiq, MM Abdullah, ET Mahmood
    Basrah Journal of Agricultural Sciences 38 (Special Issue)), 459-467 , 2025
    2025
  • Speed and feeding rate impact maize sheller productivity
    AN Kakahy, RD Sidiq, ET Mahmood, MM Abdullah
    5th International Conference on Pure Sciences and Agricultural Sciences … , 2023
    2023
    Citations: 1
  • Numerical Study of an Improved Non-Circular MC Fuelled with H/Air for Thermo-Photovoltaic (TPV) Applications
    JE Kakei A. Ayad, Abdolbaqi Mohammed Khdher, Kamal Jalal Tawfeeq Albazzaz ...
    Mathematical Modelling of Engineering Problems. 9 (4), 897-905 , 2022
    2022
    Citations: 15
  • Effect of Speed and Depth of Ploughing on Some Technical Indicators of Mechanical Unit and Physical Soil Characteristics Using Rotary Plough
    ANN Kakahy, AA Kakei, WFAAL Shamary
    Design Engineering, 9997-10009 , 2021
    2021
  • The impact of forward tractor speed and depth of ploughing in some soil physical properties
    ANN Kakahy, WFA Alshamary, AA Kakei
    IOP Conference Series: Earth and Environmental Science 761 (1), 012002 , 2021
    2021
    Citations: 7
  • Effect of planting distances and varieties on the yield of three cucumber hybrids ( Cucumis sativus L.) using drip irrigation under protected cultivation conditions
    ANN Kakahy, WFA AL Shamary, AA Kakei
    IOP Conference Series: Earth and Environmental Science 735 (1), 012072 , 2021
    2021
    Citations: 1
  • The effect of drip irrigation, plant spacing and chemical fertilizers on some characteristics of eggplant Solanum melongena L. Grown inside A greenhouse
    ANN Kakahy, WFA Alshamary
    IOP Conference Series: Earth and Environmental Science 553 (1), 012005 , 2020
    2020
    Citations: 4
  • 2019 IJABE Reviewer Acknowledgement
    I SE
    International Journal of Agricultural and Biological Engineering 12 (6), 215-219 , 2019
    2019
  • The effects of different spreader rates and fertilizer types on grain yields of barley (Hordeum vulgare L.)
    A Kakahy, A.N.N., Ahmad, D., Akhir, M.D. and Hashemi
    Food Research 3 (2), 91-95 , 2018
    2018
    Citations: 2
  • Effect of rosemary plant extract and calcium chloride sprays on the some fruit quality and storability of strawberry (Fragaria X ananassa Duch) grown under plastic house …
    HAI Dukani, SAS Kasnazany, ANN Kakahy
    Euphrates Journal of Agriculture Science 10 (3), 32-48 , 2018
    2018
    Citations: 2
  • Effects of Cutting Speeds, Moisture Contents and Sweet Potato Varieties on Percentage of Vine Pulverization
    ANN Kakahy, D Ahmad, M Akhir, S Sulaiman, A Ishake
    2015
  • Effects of knife shapes and cutting speeds of a mower on the power consumption for pulverizing sweet potato vine
    ANN Kakahy, D Ahmad, MD Akhir, S Sulaiman, A Ishak
    Key Engineering Materials 594, 1126-1130 , 2014
    2014
    Citations: 7
  • Effects of Mower Speeds on Vine Pulverization
    ANN Kakahy, D Ahmad, MD Akhir
    2014
  • Effects of rotary mower blade cutting angles on the pulverization of sweet potato vine
    ANN Kakahy, D Ahmad, MD Akhir, S Sulaiman, A Ishak
    Agriculture and Agricultural Science Procedia 2, 95-101 , 2014
    2014
    Citations: 18
  • Pulverization of sweet potato vine at different mower speeds
    ANN Kakahy, D Ahmad, MD Akhir, S Sulaiman, A Ishak
    IOP Conference Series: Materials Science and Engineering 50 (1), 012022 , 2013
    2013
    Citations: 3
  • Effects of Knife Shapes and Cutting Speeds of a Mower on the Percentage Pulverization of Sweet Potato Vine
    ANN Kakahy, D Ahmad, MD Akhir, S Sulaiman, A Ishak
    Applied Mechanics and Materials 421, 29-33 , 2013
    2013
    Citations: 1

MOST CITED SCHOLAR PUBLICATIONS

  • The effect of planting distance on yield of beans (Vicia faba L.) under drip irrigation system
    ANN Kakahy, D Ahmad, AS Abdullahi
    African Journal of Agricultural Research 7 (46), 6110-6114 , 2012
    2012
    Citations: 26
  • Design and development of an integrated slasher (pulverizer) for sweet potato harvester: A Review
    ANN Kakahy, D Ahmad, MD Akhir, A Ishak, S Sulaiman
    IOP Conference Series: Materials Science and Engineering 36 (1), 012007 , 2012
    2012
    Citations: 19
  • Effects of rotary mower blade cutting angles on the pulverization of sweet potato vine
    ANN Kakahy, D Ahmad, MD Akhir, S Sulaiman, A Ishak
    Agriculture and Agricultural Science Procedia 2, 95-101 , 2014
    2014
    Citations: 18
  • Numerical Study of an Improved Non-Circular MC Fuelled with H/Air for Thermo-Photovoltaic (TPV) Applications
    JE Kakei A. Ayad, Abdolbaqi Mohammed Khdher, Kamal Jalal Tawfeeq Albazzaz ...
    Mathematical Modelling of Engineering Problems. 9 (4), 897-905 , 2022
    2022
    Citations: 15
  • Effects of cutting speeds and moisture content on grass chopping (Pulverizing)
    ANN Kakahy, D Ahmad, MD Akhir, S Sulaiman, A Ishak
    Advanced Science Letters 19 (9), 2533-2535 , 2013
    2013
    Citations: 9
  • The impact of forward tractor speed and depth of ploughing in some soil physical properties
    ANN Kakahy, WFA Alshamary, AA Kakei
    IOP Conference Series: Earth and Environmental Science 761 (1), 012002 , 2021
    2021
    Citations: 7
  • Effects of knife shapes and cutting speeds of a mower on the power consumption for pulverizing sweet potato vine
    ANN Kakahy, D Ahmad, MD Akhir, S Sulaiman, A Ishak
    Key Engineering Materials 594, 1126-1130 , 2014
    2014
    Citations: 7
  • Effects of Types of Slashers and Speeds on Grass Chopping (Pulverizing)
    ANN Kakahy, D Ahmad, M Akhir, S Sulaiman, A Ishak
    2nd Malaysian International Conference on Trends in Bioprocess Engineering … , 2012
    2012
    Citations: 7
  • Effects of Types of Slashers and Cutting Speeds on the Quality of Grass Chopping (Pulverizing) at High Moisture Content
    ANN Kakahy, D Ahmad, M Akhir, S Sulaiman, A Ishak, H Ali
    International Conference on Mechanical Engineering and Advanced Technology … , 2012
    2012
    Citations: 7
  • Effects of different cutting speeds on Grass pulverizing
    ANN Kakahy, D Ahmad, M Akhir, A Ishak, S Sulaiman
    International Conference on Green Technology and Ecosystems for Global … , 2012
    2012
    Citations: 5
  • The effect of drip irrigation, plant spacing and chemical fertilizers on some characteristics of eggplant Solanum melongena L. Grown inside A greenhouse
    ANN Kakahy, WFA Alshamary
    IOP Conference Series: Earth and Environmental Science 553 (1), 012005 , 2020
    2020
    Citations: 4
  • Pulverization of sweet potato vine at different mower speeds
    ANN Kakahy, D Ahmad, MD Akhir, S Sulaiman, A Ishak
    IOP Conference Series: Materials Science and Engineering 50 (1), 012022 , 2013
    2013
    Citations: 3
  • Effects of feeding angles and cutting speeds of a mower knife with serrated edges on the pulverization of sweet potato vines
    ANN Kakahy, D Ahmad, MD Akhir, S Sulaiman, A Ishak
    Advanced Materials Research 626, 260-264 , 2013
    2013
    Citations: 3
  • Effects of Cutting Speeds and Knife Angles of a Mower Knife with Serrated Edges on the Pulverization of Sweet Potato Vines
    ANN Kakahy, D Ahmad, MA Hamid, S Sulaiman, I Aris
    2012
    Citations: 3
  • Effects of Knife Angles and Cutting Speeds on Pulverization of Sweet Potato Vines
    ANN Kakahy, D Ahmad, MD Akhir, S Sulaiman, A Ishak
    Proceedings of USM-AUT International Conference 2012 Sustainable Economic … , 2012
    2012
    Citations: 3
  • The effects of different spreader rates and fertilizer types on grain yields of barley (Hordeum vulgare L.)
    A Kakahy, A.N.N., Ahmad, D., Akhir, M.D. and Hashemi
    Food Research 3 (2), 91-95 , 2018
    2018
    Citations: 2
  • Effect of rosemary plant extract and calcium chloride sprays on the some fruit quality and storability of strawberry (Fragaria X ananassa Duch) grown under plastic house …
    HAI Dukani, SAS Kasnazany, ANN Kakahy
    Euphrates Journal of Agriculture Science 10 (3), 32-48 , 2018
    2018
    Citations: 2
  • A study on the effects of planting distance on yield of broad beans (Vicia faba L.) under drip irrigation system
    ANN Kakahy, D Ahmad, AS Abdullahi
    VII International Postharvest Symposium 1012, 241-245 , 2012
    2012
    Citations: 2
  • Speed and feeding rate impact maize sheller productivity
    AN Kakahy, RD Sidiq, ET Mahmood, MM Abdullah
    5th International Conference on Pure Sciences and Agricultural Sciences … , 2023
    2023
    Citations: 1
  • Effect of planting distances and varieties on the yield of three cucumber hybrids ( Cucumis sativus L.) using drip irrigation under protected cultivation conditions
    ANN Kakahy, WFA AL Shamary, AA Kakei
    IOP Conference Series: Earth and Environmental Science 735 (1), 012072 , 2021
    2021
    Citations: 1