Sara, S. S., Shuaibu, Y. M., Garba, A.A. INFLUENCE OF ORGANIC MANURE SOURCES AND UREA DEEP PLACEMENT ON THE PRODUCTION OF MAIZE (Zea mays L.) IN BAUCHI STATE, NIGERIA. njaat [Internet]. 2024 Jun. 29 [cited 2025 May 22];4(2):77-89. Available from: https://njaat.com.ng/index.php/njaat/article/view/694