Show I IThe Complete Plant Food The use of complete plant food increases increases in in- I creases the humus content of the soil since it encourages encourage the growth I of both the top and the root root system I of plants plant A certain percentage of ithe i the root system decays each year This d decomposed composed vegetable matter maHer bec becomes m s a part of the soil Experiments ments meets have shown that a considerable ble percentage of humus is added to the s. s soil il lr in this w way y |