Engineering

Research Papers/Topics in Engineering

Influence du moment d’application du NPK sur la croissance et le rendement du maïs (Zea mays L.) installé sur un ferralsol

Objectif : La province du Haut Katanga est dominée par des sols ferralitiques, une des sources majeures des faibles rendements du maïs dans cette contrée. Pour pallier aux problèmes d’infertilités de ces sols et accroître la productivité, les producteurs recourent essentiellement aux engrais minéraux (NPK). Ces derniers sont généralement appliqués au moment de semis. Cependant, avec les perturbations climatiques actuelles, le moment de leur application devient une préoccupat...

Les faibles doses d’engrais azotés ne permettront pas d’optimiser le rendement des nouvelles variétés de maïs dans la région de Lubumbashi (RD Congo)

L’agriculture congolaise est encore largement extensive, se caractérisant par de faibles rendements. S’agissant du maïs, les rendements obtenus en milieux paysans sont d’environ 10 fois moins au potentiel de la culture; le faible niveau de fertilité de sols couplé à l’utilisation du matériel non performant sont les causes majeures. Cet essai a été installé suivant un dispositif split plot pour évaluer les effets des doses croissantes de la fertilisation azoté...

Effets de doses croissantes de NaCl sur le comportement du bananier et la morpho diversité de champignons du sol

Le bananier est exposé à de nombreux problèmes entre autres la salinité excessive des sols et des eaux d’irrigation qui entraînent une chute de sa productivité. Cet essai a été conduit en vue d’évaluer les effets de la salinité sur le comportement du bananier et la diversité de la coloration des champignons dans ce sol. L’essai a été installé sous serre suivant un dispositif complètement randomisé à 3 répétitions. Deux cultivars de bananier (Pelipi...

Etude de cas sur l’impact des amendements organiques vis-à-vis de la salinité en culture de bananier

Ce travail a été initié dans l’objectif d’évaluer les effets des doses croissantes de la matière organique sur le comportement du bananier soumis à différents niveaux de salinité. L’essai a été conduit sous serre suivant un dispositif complètement randomisé à 3 répétitions. Les traitements comprenaient 3 doses d’amendements organiques (0, 1 et 2 kg) et 5 doses de sel (0 ; 2,5 ; 5 ; 7,5 et 10 g/L). Les résultats montrent que les fortes doses de sels (plus de 5g) ont eu ...

Assessment of Combined Effects of Human Faeces and Mineral Fertilizers on the Behavior of Okra (Abelmoschus esculentus L.) Cultivated in Lubumbashi, DR Congo

Improving soil fertility through organic fertilizers application has become a major factor that has enabled the world to feed billions of people. However, the required quantities of organic material are enormous, so it becomes necessary to combine different types of fertilizers to feed plants. The objective of this study was to evaluate the effects generated by the integration of human faeces to mineral fertilizers by bringing them to okra (Abelmoschus esculentus) crop.&nb...

Evaluation of Maize Response (Zea mays L.) to Various Modes and Moments of Chicken Manure Spreading in Lubumbashi, DR Congo

Soils of sub-saharan countries have low inherent fertility, this deficiency is main factor determining agricultural production. Most of previous studies showed beneficial effects of organic matter in improving physical and chemical properties of soil and increasing yields. However, it remains unclear about when and how to spread the organic matter to get maximum nutrients for plants. This study was conducted in conditions of Lubumbashi to determine the influence of sp...

Impact of Chicken Manure Integration with Mineral Fertilizer on Soil Nutriments Balance and Maize (Zea mays) Yield: A Case Study on Degraded Soil of Lubumbashi (DR Congo)

One of the most important challenges to continuously maximize crop production on limited areas of agricultural land is to maintain or enhance soil fertility. Organic fertilizer application is needed to replace nutrient removed by crop from the fields in order to restore crop production potential of a soil. But application of organic fertilizer alone insufficiently increases crop yield per area because the nutrient content of organic fertilizer is unbalanced. A trial was co...

Les faibles doses de biomasses vertes de légumineuses, des bons substituts des engrais minéraux dans la maïsiculture à Lubumbashi ?

La fixation symbiotique d’azote est un atout majeur des légumineuses pour substituer aux engrais chimiques surtout pour les cultures exigeantes en azote comme le maïs. Le coût élevé des engrais minéraux limite leur utilisation pour les paysans qui pratique une agriculture de subsistance. De plus, ces engrais chimiques généralement utilisés acidifient les sols. Ainsi, cette étude a été initiée en vue d’évaluer les potentialités des faibles doses des biomasses à base de ...

EFFECTS OF LIQUID WASTES FROM AUTOMOBILE WORKSHOPS ON PROPERTIES OF SOILS IN ENUGU STATE, NIGERIA

ABSTRACT: This study was carried out in Udi, Udenu and Nsukka Local Government Areas, in Enugu state. The effects of liquid wastes from automobile workshops on some selected soil properties of the study area were investigated. Auger samples were collected at two depths, (surface, 0- 20cm) and (subsurface, 20- 40cm) of automobile wastes contaminated sites and 100m away for uncontaminated sites. Core samples were collected from both soils and surface samples were again collected for planting m...

Evaluation of The Effect of ANTHROPOGENIC Activities and Domestic Waste On Surface Water

ABSTRACT The microbiological and organic pollutants characteristics of Owena dam in Ifedore local  government  area  of  Ondo-state,  Nigeria  was  carried  out,  nine  water  samples  were collected from three different parts of the downstream side, which include; around the waste disposal  site,  community  settlement  and  farm  environment.  The  microorganisms  isolated were&nbsp...

Evaluation of The Effectiveness of Quality Control in Dangote Cement Plc

   v  ABSTRACT The project evaluates the effectiveness of quality control  in Dangote Cement PLC, Ibese  Ogun  State,  Nigeria.  Limestone,  shale  and  laterite  samples  were  from  the  mines  to determine their right grade as well as their mixing proportion. Also samples were taken from kiln feed and the final stage of cement production. The compressive strength of the cubes is determined according t...

Robotics: Kinematics and Mathematical Foundations (Lesson Note)

The Goal• Develop the mathematical tools that we need to talk about where things are in space.• Where things are depend on where you are looking at them from. How do we make this more precise?

Kinetic Study and Optimization of Selected Factors Affecting Corrosion Using RSM

ABSTRACT   The kinetics and optimization of inhibitive action of leaves extract of pawpaw, Azadirachta indica (neem tree) and bitter leaf on corrosion of mild steel in acidic medium was studied by weight loss technique using central composite design of response surface methodology for optimization. The metal was analyzed using Atomic Absorption Spectrophotometer to determine its elemental compositions. The extract was obtained by liquid extraction using ethanol and was analyz...

Review on Some Plants as Bio-pesticides

Abstract: The study used Onion (Allium Cepa), Garlic (Allium Sativum L.) and Sour Orange (Citrus Aurantium) to assess their effectiveness as bio- pesticides. The study also revealed that plants play vital roles towards the storage of many food stuffs. The consideration for the used extracts of plants origin is that they were easily biodegradable, effective on some pests and considered safer in pest control operations as they minimized pesticide residues and also ensured  safety of th...

OPTIMUM DESIGN OF WELDED PLATE GIRDER

ABSTRACTThe Project work presents an Optimum design of welded plate girder. A simply supported plate girder with span of 15meters was chosen for the case study. The girder was subjected to a self-weight of 50KN/m and concentrated loads of 1000KN at 5m and 10m from the left support. The plate girder was analysed to get the design moments and shear forces. An initial manual design was carried out for the plate girder in accordance with BS 5950-2000. From the design, initial section parame...


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