Excerpt from Some Physical and Chemical Properties of the Principal Orchard Soils in the Eastern Panhandle of West Virginia
The faces of the excavations nearest the tree trunks were smoothed carefully; their surf-aces were divided into a regular pattern of one-foot squares by means of nails and twine. The profile characteristics were noted. And the distributions and sizes of the roots were plotted on cross-section paper. 'in these charts, as reproduced from the field sheets, the solid black dots represent roots with diameters up to 2 mm. The smallest heavy circles indicate roots from 2 to 5 mm, while the smallest light circles represent roots from 5 to 10 mm. The next size of larger heavy circles shows roots from 10 to. 20 mm in di ameter and the largest light circles represent those roots of 20 mm and up.
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HRD. Condition: New. New Book. Shipped from UK. Established seller since 2000. Seller Inventory # LX-9780366275601
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