Abstract
Prediction equations were developed for predicting the strength of soil when different fertilizers at different levels were applied. The soil strength was found to increase linearly with the application of high doses of fertilizers. Maximum strength was recorded when phosphorus fertilizer was used. The order of merit of the fertilizers in increasing the strength of soil was established in this study as phosphorus mixed fertilizer, nitrogen and potassium fertilizers. Further, the strength of soil was found higher when fertilizer mixed with soil was placed below pure soil as compared to its placement above the pure soil.
