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2021, vol. 46, br. 4, str. 10-30
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Modeliranje operativnih parametara obrade za plan potrebne snage za tri radna tela u obradi ilovastog zemljišta
Modeling of tillage operation parameters for draft and power requirement for three tillage implements in a loamy soil
aUniversity of Uyo, Faculty of Engineering, Department of Agricultural and Food Engineering, Uyo, Nigeria bUniversity of Ibadan, Faculty of Technology, Department of Agricultural and Environmental Engineering, Ibadan, Nigeria
e-adresa: okokokizito@gmail.com
Sažetak
Obrada zemljišta oranjem je osnovna operacija u poljoprivredi gde energetske potrebe predstavljaju značajan deo potrošene energije koja se koristi u biljnoj proizvodnji. Probe su izvedene korišćenjem pet brzina kretanja traktora (3,6; 5,4; 7,20 9,0 i 10,8 km/h) i pet dubina obrade zemljišta (10, 15, 20, 25 i 30 cm) da bi se odredila optimalna brzina kretanja traktora sa različitim priključkom i dubinama obrade zemljišta za: diskosni plug (3 radna tela-diska), kultivator sa opružnim motičicama i teška tanjirača. Zemljište prema mehaničkom sastavu je pretežno ilovastog mehaničkog sastava. Dizajn eksperimenta ima dva faktora: faktorsku analiza sa pet nivoa, i metodu određene površine (CCRD). Odabrani modeli su analizirani korišćenjem testa ANOVA sa 0,05 i takođe su validirani. Visoke vrednosti koeficijenta determinacije za sve odabrane modele i određeno slaganje između predviđenih i stvarnih vrednosti dubine rada i potrebne snage traktora za sve testirane priključne mašine, pokazuju da se generisane jednačine modela mogu koristiti u svrhe predviđanja plana potrebne snage vučne mašine (traktora) za određene priključne mašine.
Abstract
Tillage is the basic operation in agriculture and its energy requirements represent a considerable portion of the energy utilized in crop production. The trials were achieved using five tractor speeds (3.6, 5.4, 7.2, 9.0 and 10.8 km/hr) and five tillage depths (10, 15, 20, 25 and 30 cm) to determine implement speed at different tillage depths for 3-bottom disc plough, spring tine cultivator and offset disc harrow on loamy soil. The design of the experiment used were two factors, five levels factorial of Central Composite Rotatable Design of Response Surface Method. Selected models were analyzed using ANOVA at ao. 05 and also validated. The high values of the coefficient of determination for all the selected models and the reasonable agreement between the predicted and actual values of draft and power requirement for all the tested implements show that the generated model equations can be used for predictive purposes for draft and power requirement.
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