The researchers conducted a field experiment to study the effects of using biochar with NPK on okra plants. They planted okra in different treatments and measured various growth parameters like plant height, number of leaves, and fruit yield. The results showed that the combination of NPK and biochar had a significant impact on the growth and yield of okra plants, as well as on the protein and chlorophyll content of the fruits. This means that using NPK and biochar together can be beneficial for okra crops in terms of improving their growth and yield under the specific conditions of the study area.