Category: CJST Volume 4

Coffee is a tropical evergreen flowering plant under the family Rubiaceae and is the foremost valuable cash crop in Ethiopia. In Ethiopia, coffee is the main source of foreign currency contributing a lion’s share of about 60% of the total export earnings. However, it is significantly below the crops’ attainable yield potential due to various Read More …

There is growing interest in botanical insecticides as possible substitutes for chemical insecticides. The larvicidal properties of essential oils and extracts from Azadirachta indica were tested in this work against the fourth instar of Anopheles gambiae s.l. using laboratory and semi-field investigations. In the laboratory and semi-field studies, the identical batches of twenty early 4th-instar Read More …

The activity concentrations of naturally occurring radioactive levels of radionuclides and risk factors evaluated in fertilizers, fertilized and unfertilized soils, and soils used as building materials. The estimated average activity concentrations for soil samples were 9.1±0.17 Bq/kg, 11.5±0.362 Bq/kg, and 248±4.1 Bq/kg for the 226Ra, 232Th, and 40K, while the estimated average activity concentrations for Read More …