Effects of Blended NPSB Fertilizer Application Rates on Coriander ( Coriandrum sativum L.) Varieties’ Growth, Yield, and Yield Components

A study conducted in 2024 G.C. in western Ethiopia, Horro Guduru Wallaga zone, Horro district, aimed to investigate the influence of blended NPSB fertilizer rates on the growth, yield, and yield attributes of coriander varieties. The experiment involved 16 treatment combinations of four coriander varieties (Darara, Walta‐I, Gadisa, and local Dimbilal) and four rates of NPSB blended fertilizers (0, 50, 100, and 150 kgha −1 ). Data on phenological, growth, yield, and yield‐related variables were collected and analyzed using Genstat software Version 14. The analysis of variance showed that all parameters were significantly affected by the interaction effects, except days to emergence. The Darara variety recorded the highest seed yield (3.99 tha −1 ) and thousand seed weight (67.59 g) at a NPSB blended fertilizer rate of 150 kg ha −1 . The highest net benefit (964,980 EBirr ha −1 ) was achieved at 150 kgha −1 NPSB, but the highest marginal rate of return was recorded with 100 kg/ha NPSB blended fertilizer. Even though it needs more time and locations, the study concluded that using the Darara variety with 100 kgha −1 NPSB blended fertilizer is economically important.