DESIGN OF SOLAR PHOTOVOLTAIC SYSTEM FOR UNDERGROUND IRRIGATION PUMPING WATER FOR THE AGRICULTURAL FARMLAND IN NATIONAL ROOT CROPS RESEARCH INSTITUTE, UMUDIKE (NRCRI), ABIA STATE, NIGERIA. JST [Internet]. 2025 Sep. 16 [cited 2026 May 24];30(10). Available from: https://journals.ust.edu/index.php/JST/article/view/3176