@book { SoilQualityImprovementofAcidicSoilandItsEffectsonTheGrowthandYieldofMaize,
    title = "Soil Quality Improvement of Acidic Soil and Its Effects on The Growth and Yield of Maize",
    author = "Shedrach {Ugwu}",
    year = "2019",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/455533"
}