ThisstudyusesvariousstatisticaltechniquesinanattempttoquantifythemagnitudeandtodeterminethesignificanceoftrendsintheyieldsmajorfoodcropsatseasonalandannualtimescalesoverRwandafortheperiod2000-2010.Themagnitudederivedfromtheslopesoftheregression lines is presented spatially in the form of maps. Asteadyriseinmajorfoodcropsyieldswasregistered.Therewasahighernon-significantincreaseinbeansyieldsintheeast,northernandsouthwesternregions;andahighernonsignificant decrease in the southern and northwestern regions.Asignificantincreaseincassavayieldswasobservedinthecentralregion.Theeastsouthernandsouthwesternregionshad significant decreases in cassava yields in 2000-2005. Thesame was witnessed in the northwestern region in 2006-2010.Thecentralandnorthwesternregionshadasignificantincreasein Irish potato yields, especially in 2000-2005and asignificantreductionwasregisteredoverthesouthwestern,westernandeasternregions.However,thesoutheasternregion recorded a decrease in 2000-2005, and an increase in2006-2010. A significant decline in maize yields was observedinthewesternregionin2000-2005,whiletherestofcountryhadanincreaseespeciallyduringtheperiod2006-2010.Asignificant decrease in sweet potato yields was recorded in thesouthwesternandwesternregionsin2000-2005;andinthewestern, northwestern and southeastern regions in 2006-2010.A significant increase in sweet potato yields was recorded incentralRwanda.Thesespatio-temporaltrendsintheyieldsmajorfoodcropsmaybeinfluencedbythevariabilityinprecipitationintensityandfrequencyobservedrecentlyoverRwandaincombinationwiththeagriculturalreformsundertaken since 2007.