Show A FERTILIZER TEST Way a Farmer May Experiment and Ascertain the Elements Needed Need-ed in Soil The writer was recently talking with Prof C G Hopkins of the University of Illinois on the use of phosphorous on tho clover being grown at the university uni-versity farm Tne professor gave the following figures on the test on several sev-eral experimental plots last year Ten plots wore used two of which wero check plots and received no treatment The ylold of dried clover hay in tons on the ten plots was as follows No treatment 126 Legumes 121 No treatment 115 Legumes lime 132 Legumes 121 By comparing the above It will be seen that this land did not lack n trogon tro-gon as the plowing under of the legumes le-gumes did not incrase the yield The limed plot gave a slightly Increased yield The next five plots yielded as follows Legumes lime phosphorus 291 Legumes phosphorus 291 This seemed to Indicate that the unto was not needed and without doubt this was the case Legumes lime phosphorus potassium potas-sium 319 Lime phosphorus potassium S1U Lime phosphorus potassium 841 The above three plots also Indicated that nitrogen was not needed as the plots yielded about the some with and without the legumes The story thai this set of experiments tells Is that the land needs phosphorus and potassium potas-sium but does not need nitrogen 01 limeWhat Is to hinder our farmers from carrying on experiment like thIs on their farms and finding out just what elements are needed In their soils |