Review on integrated uses of Organic and Inorganic Fertilizers on Soil Fertility and some selected Cereal and Tuber Crop Production in Ethiopia

Seminar paper from the year 2022 in the subject Geography / Earth Science - Geology, Mineralogy, Soil Science, grade: A, Wollega University (Soil resource and watershed management), course: Seminar, language: English, abstract: The Organic fertilizer improves physical, chemical and biological activities of soil and inorganic fertilizer is usually immediately and fast containing all necessary nutrients that are directly accessible for plants. The objective of the present review is to assess the integrated organic and inorganic fertilizers on growth and yield of some selected cereal and tuber crops. The treatments included some selected combinations of organic and inorganic nutrient sources including farm yard manure, Compost, poultry manure and NPK application. Some experimental results showed that wheat, Maize, Teff, Potato, Carrot yield, yield components and soil Physico-chemical properties were significantly affected by the integration of organic and inorganic fertilizer sources. The highest Teff grain yield (3144.8kg ha-1) and biomassyield (12562.5kg ha-1) were obtained from the applications of half doses of vermicompost(4.8tha-1) which is based on recommended N equivalent and half doses of the recommendednitrogen and phosphorus fertilizers (34.5kg ha-1N and 30kg ha-1P that half dose contains)followed by 2846 kg ha-1and 11833.3 kg ha-1for grain yield and biomass yield, respectively.The preharvest organic and urea treatment significantly (P<0.05) affected the yield of carrot and the highest yield (11.33tha-1) of carrot was obtained due to preharvest organic and ureatreatment at the rates of 309 and 411kg/ha respectively while the lowest yield was recorded in the control treatment (4.9tha-1). The highest total tuber yield was attained in response tothe combined integration of the three fertilizers at the highest rates (120 kg N ha-1 + 92 kgP2O5 ha-1 + 30t CM ha-1).The lowest total tuber yield was recorded on plots without anyfertilizer application. Hence, the highest total tuber yield was about 3.6 fold higher than the lowest total tuber yield. Therefore, the results of seminar review revealed that integrated of inorganic and organic fertilizers could be the best strategy to mentain soil fertility and to enhance production of cereal crop and tuber yield crops.