This study examined the effects of teachers’ personality on the management of secondary school farms in Adamawa State, Nigeria. Two research questions and two hypotheses guided the study. Correlational survey research design was used for this study. The population of the study consisted of 240 agricultural science teachers and 1200 students. Random and stratified sampling techniques were used to obtain a sample size of 150 Agricultural science teachers and 300 students. Instrument that was used for data collection was Structured questionnaires. The reliability of the instrument was 0.94 and was determined using Cronbach Alpha formula. Data collected were analysed using Statistical Package of Social Science (SPSS) version 2010. Descriptive statistics of Mean and standard deviation were used to answer the research questions while inferential statistics of Pearson Product Moment Correlation (PPMC) was used to test the null hypotheses at 0.05 level of significance. The findings revealed that there is a significant positive correlation between the mean response of teachers and students on extroverted and introverted agricultural science teachers in the management of secondary school farm (r = 0.79, p = 0.00, N= 450). It further revealed that there is a significant positive correlation between the mean response of teachers and students on emotionally stable and unstable agricultural science teachers in the management of secondary school farms (r = 0.54, p = 0.00, N= 450). Based on the findings, it was concluded that teachers’ personality played a strong role in the management of secondary school farms. It was therefore recommended that school administrators should organize workshop and seminars for teachers, Ministry of Education should employ professional guidance and counselling officers to enlighten them on the relationship of personality of teachers in the management of secondary school farms in Adamawa State, Nigeria.