. Bulletin. Natural history; Natural history. Fig. 3. â The cyclone type lawn spreader was used to apply fertilizer to the soil surface at Lisle, Oregon, Marshall, and Carterville. was made to fill or close the holes fol- lowing the distribution of the fertilizer. Injection of liquid fertilizers into the soil was tested in the single-tree plots at the Morton Arboretum. Enough fer- tilizer solution to treat 15 trees was pre- pared. Fifty-seven liters (15 gal) of solu- tion were used per tree with this volume evenly divided into 14 injection sites. It was injected 45-60 cm (18-24 in) deep with a
. Bulletin. Natural history; Natural history. Fig. 3. â The cyclone type lawn spreader was used to apply fertilizer to the soil surface at Lisle, Oregon, Marshall, and Carterville. was made to fill or close the holes fol- lowing the distribution of the fertilizer. Injection of liquid fertilizers into the soil was tested in the single-tree plots at the Morton Arboretum. Enough fer- tilizer solution to treat 15 trees was pre- pared. Fifty-seven liters (15 gal) of solu- tion were used per tree with this volume evenly divided into 14 injection sites. It was injected 45-60 cm (18-24 in) deep with a soil needle (Fig. 7) and a ^ â / " s r \ 1 4 ; Fig. 4. â The electric dr vas used to prepare holes I 'Ith a soil auge e soil at Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
