Nitrogen and Phosphorus Fertilizers and Tillage Effects on Growth and Yield of Maize ( Zea mays L.) at Dugda District in the Central Rift Valley of Ethiopia

摘要

An experiment was conducted at Dugda district in the Central Rift Valley of Ethiopia under field conditions to determine the impacts of tillage levels, N and P fertilizers on growth and yield of maize ( Zea mays L.). Two tillage levels; (1) Conventional a