Amer K. A. Al-neama

@uodiyala.edu.iq

Soil Science and Water Resources Department/Faculty of Agriculture
University of Diyala

Amer K. A. Al-neama


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https://researchid.co/amer-agri

RESEARCH INTERESTS

Tillage Tools Design
Passive Tillage Tools
5

Scopus Publications

Scopus Publications

  • Evaluation of adjustable tine wings under soil bin conditions
    Landtechnik, 2022
  • The relationship between draft force and horizontal force acting on passive tillage tool in term of soil-tool interaction. A review
    Amer K. A. Al-Neama, Mousa A. Al-Jibouri, Essam L. Esmail
    Iop Conference Series Earth and Environmental Science, 2021
  • Description of furrow shaping created by single standard tines
    Amer Khalid Ahmed AL-Neama, Thomas Herlitzius
    Engineering in Agriculture Environment and Food, 2018
    Design optimization and online evaluation of work quality of tillage tools help to find optimal balance between effort and result in tillage operation. Currently, usage of laser scanner has become widespread to examine the soil profile after tillage. However, the results are significantly affected by external circumstances in the field such as sunlight, weeds, residual of plant, etc. Therefore, a soil bin test was carried out by using a laser scanner to evaluate the width and the area of the furrow (shape of furrow) created by using four standard chisel plow tines heavy duty, double heart, double heart with wing and duck foot with widths of cut 0.065, 0.135, 0.450, and 0.400 m, respectively at different speeds and depths. MATLAB based computer program was used to estimate soil profile parameters. Lab results were verified in a field test. The field results were evaluated based on geometric shape of the furrow obtained from the soil bin and a model based on Willatt and Willis's approach in predicting the furrow shape. Results show that the width of the furrow increases linearly with depth while the area of the furrow increases quadratically with depth for all tines. An excellent geometric shape of the furrow was obtained from the soil bin for every tine. The furrow shape is triangle for heavy duty and double heart tines, while it is triangle plus trapezoidal shape for double heart with wings and duck foot tines. Willatt and Willis's equation related to the width of the furrow shows a good agreement for heavy duty and double heart tines at shallow depth.
  • Draft forces prediction model for standard single tines by using principles of soil mechanics and soil profile evaluation
    Amer Khalid Ahmed Al-Neama, T. Herlitzius
    Landtechnik, 2017
    In dieser Studie wird ein Modell zur Vorhersage der Zugkraft beschrieben, das auf unterschiedliche Standard-Einzelzinken anwendbar ist. Zugkraftmessungen wurden mit vier Standard-Einzelzinken mit Schmalschar, Doppelherzschar, Doppelherzschar mit Flugeln und Gansefusschar durchgefuhrt. Die Zinkenbreiten betrugen 65, 135, 450 und 400 mm, der Test erfolgte in einer Bodenrinne mit einem sandigen Lehmboden. Dabei wurde die Abhangigkeit von Geschwindigkeit und Arbeitstiefe auf die Zugkraft unter kontrollierten Laborbedingungen untersucht. Die Ergebnisse wurden anhand eines Vorhersagemodells ausgewertet. Eine gute Korrelation zwischen gemessenen und vorhergesagten Werten fur alle Zinken mit einer durchschnittlichen absoluten Variation von weniger als 15 % wurde gefunden.
  • New regression model for predicting horizontal forces of single tines using a dummy variable and tine geometric parameters
    Amer Khalid Ahmed Al-Neama, T. Herlitzius
    Landtechnik, 2016
    This paper discusses three different equations of a regression model to predict the horizontal force for single tines. Four standard single chisel plow tines were used (heavy duty, double heart, double heart with wings and duck-foot). The first model is based on the effect of the operational conditions speed and depth for each tine, the second model is employing a statistic dummy variable, also representing each tine. The geometry of tines is base for the third model. A stepwise selection with a multi-linear regression at significance level 5% was used to evaluate these regression models. Experiments were carried out in a sandy loam soil at soil moisture content of 10.3% ± 0.8 (based on dry matter) and soil bulk density of 1.38 g/cm³ ± 0.01 under controlled soil bin conditions featuring varying speeds between 1.1 and 3.6 m/s and varying depth from 5 to 20 cm. Field testing was done in order to validate the regression model obtained from the soil bin. The results show that the horizontal force increases linearly with the speed-depth interaction term and quadratically with the depth for each tine in all regression models. The depth is effecting the force more significantly in comparison to speed (p < 0.05). Eventually it can be stated that there is a good general accordance of observed and predicted values of the horizontal force for all tines by using the dummy and the geometric regression models.