Effect of Coffee Husk Compost and NPSB Fertilizers on Selected Soil Chemical Properties of Potato Field in Chora District, South West Ethiopia

Abstract

Field experiment was conducted in Chora District of south western Ethiopia, to evaluate the effect of different rates of coffee husk compost (CHC) and 18.9N + 37.7P + 6.94S + 0.15B (NPSB) in the form of NH4, P2O5, SO4−, and B2O5, repectively, blended fertilizer on selected soil chemical properties of potato field during 2021. The treatment consisted of four rates of CHC (0, 2.5, 5, and 7.5 t ha−1) and four rates of blended NPSB fertilizer (0, 112.5, 150, and 187.5 kg ha−1). The experiment was laid out in randomized complete block design with three replications. Postharvest soil data were collected and subjected to ANOVA using SAS version 9.4. All the soil parameters analyzed were significantly ( P < 0.05 ) affected by the main factors of CHC and NPSB blended fertilizer except exchangeable K+ and Na+ which were affected by main factors but not by factors interaction. The maximum pH (5.3), OC (6.0%), and CEC (14.10 meq 100g−1) were obtained from application of sole 7.5.t CHC ha−1 which is at par with combined 7.5.t CHC and 112.5 kg NPSB ha−1, while the maximum TN (26%), Av. P (3.57%), and Av. S (4.36%) were obtained from combined application of 7.5.t CHC and 112.5 kg NPSB ha−1. The sole application of either of 150 kg or 187.5 kg NPSB ha−1 was resulted in high exchangeable acidity. Therefore, combined application of CHC and NPSB fertilizers raised the pH, improves the OC%, total N, available P and S, reduced the exchangeable acidity, and raises the CEC and exchangeable bases of potato field soil as compared to the control and sole NPSB fertilizer.

Short-Term Integrated Application of Nitrogen, Phosphorus, Sulfur, and Boron Fertilizer and the Farmyard Manure Effect on the Yield and Yield Components of Common Bean (Phaseolus vulgaris L.) at Alle Special Woreda, Southern Ethiopia

“…Besides, integrated application of inorganic nutrients with organic nutrients improves soil chemical properties [17][18][19]. For instance, Jibril and Bekele [19] reported that the higher total nitrogen (26%), available phosphorus (3.57%), and sulfur (4.36%) were obtained from a combined application of 7.5 t of cofee husk compost and 112.5 kg of NPSB•ha −1 .…”

“…Besides, integrated application of inorganic nutrients with organic nutrients improves soil chemical properties [17][18][19]. For instance, Jibril and Bekele [19] reported that the higher total nitrogen (26%), available phosphorus (3.57%), and sulfur (4.36%) were obtained from a combined application of 7.5 t of cofee husk compost and 112.5 kg of NPSB•ha −1 . Furthermore, Tana and Woldesenbet [18] recorded that the application of 5 t FYM•ha −1 along with 75% recommended rates of inorganic N and P (17.25 kg N•ha −1 and 34.5 kg P 2 O 5 ha −1 ) was found to be superior and increased soil organic carbon content by 36 and 44.6%, available phosphorus by 70.5 and 78.2%, and available potassium by 42.5 and 26.3%.…”

Effects of Bio-Slurry and Chemical Fertilizer Application on Soil Properties and Food Safety of Tomato (Solanum lycopersicum Mill.)

“…Tis might be attributed by high amount of organic matter in BS, which enhances the OC content of the soil; organic materials have a major impact on mineralization rates by increasing soil organic carbon directly [68]. Other previous studies also demonstrated signifcantly increasing OC of the soil by the application of organic fertilizers compared to CF [69][70][71][72].…”

“…Tis could attribute to the higher CEC and organic matter content in BS and the nature of the organic matter to bufer change in pH. Previous studies reported increasing organic matter content and available nutrients with the application of organic fertilizers, which in turn increases the exchangeable bases and the cation exchange capacity of the soil [17,69,79]. Organic matter increases the bufering capacity of soils and prevents acidifcation through binding cations [80].…”