MJAS (Mozambican Journal of Applied Science) is an international, multidisciplinary, peer reviewed and electronic quarterly publication journal, concerned with agriculture, agrarian economy, social sciences and Humanities. The peer-review process is aimed to control the scholarly content of submitted manuscripts, by national and international experts. Moreover, the editorial board selects high-quality manuscripts with excellence in content, preferably without commercial targets. The manuscript submission and publication process of the accepted manuscripts are free of charge. This journal supports free access publications.

Vol. 1 No. 4 (2022): Copper and pH Effects on Soil Nitrogen Mineralization after Compost Application

The study looked to evaluate the effects of two levels of copper in a sandy clay loam soil (of the order Aridisol), and of five levels of pH, on the velocity of nitrogen mineralization after incorpo- rating compost. The experiment underwent 10 treatments: five pH levels, and two copper levels (251 mg kg¯‘ and 345 mg kg¯‘) with five replications. Planter pots were set as the experi- mental unit, and were maintained in a greenhouse for 108 days at a temperature of 25 °C. They were watered to maintain field capacity. The nitrate (NO3¯) and ammonium (NH ) contents were measured five times at 0, 27, 54, 81, and 108 days after compost application. Analysis of variance of data and Tukey test (p≤0.05), showed that the factors copper concentration and time affected ammonium and nitrate concentrations. It can be concluded that time is the factor of greatest importance in the process of organic-N mineralization in soils with medium to moderately high total levels of copper. Time factor weakly interact with the soil copper content, and is independent of the pH in a range from moderately acid to moderately alkaline.

Published: 2022-06-03

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