Ferralsols form a dominant type of soil on which most crops are grown in the Lake Victoria agro-ecological zone.Soil acidity has been recognized among the most important agricultural problems in such soils, which adversely affect crop production and productivity.A study was conducted with the objective of determining the effect of applying low rates of lime and chicken manure on selected soil chemical properties.Using a Split Plot Factorial Randomized Complete Block Design, agricultural lime (0.0, 0.5, 1.0, 1.5 & 2.0 t•ha -1 ) as the main plot and chicken manure (0.0, 1.0, 2.0 & 3.0 t•ha -1 ) as sub-plot were applied, replicated three times.The test crop was common bean var.NABE 15.The experiment was conducted for three rainy seasons, two seasons on-station and one season on-farm on Ferralsol soil in the Lake Victoria crescent of central Uganda.The results showed that applying low rates of lime with chicken manure significantly (p < 0.05) increased pH, CEC, P, N, K, BS and Mn changes at Mukono but not Masaka.A strong positive significant (r 2 = 0.987) relationship with pH change was obtained when 0.5 t•ha -1 lime was applied with the four chicken manure rates in Mukono.From the study, we recommend the application of small quantities of lime at 1.0 t•ha -1 with either 2.0 or 3.0 t•ha -1 chicken manure.
Un choc applique a une structure routiere produit des phenomenes physiques differents selon la nature du choc (frequence, intensite). Une sollicitation de quelques kilohertz provoque des vibrations mesurables en surface de la chaussee. La reponse en frequence est sensible a la presence de dommages internes tels que des vides ou des fissures. Cependant, la bande de frequences sensibles depend de la structure etudiee a priori inconnu. Un processus specifique a ete developpe pour normaliser les resultats d'essai. Ainsi, une cartographie de la structure de la route peut etre presentee. (A).
