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The Effects of Soil Amendments on Soil Aggregation and on Water Movement
Author(s) -
Hubbell D. S.,
Stubblefield Thomas M.
Publication year - 1949
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1949.036159950013000c0093x
Subject(s) - citation , soil conservation , service (business) , supervisor , agriculture , library science , forestry , geography , political science , computer science , business , archaeology , marketing , law
I 1906, Hilgard (4) said that the physical condition (i. e., structure) of soil must be determined before judging its fertility. Forty years later, Baver (2) stated, "Soil structure is the key to soil fertility". The interval between these comments produced many data showing beneficial effects of crops and cropping systems on soil structure and on fertility. Until recently, however, when Page and Willard (8) found a significant correlation between degree of soil aggregation and corn yield, comparatively little direct evidence had been adduced to substantiate the statements of Hilgard and 'Baver. The tardy appearance of such evidence was probably due to the fact that "soil structure" was long an ill-defined term and adequate methods had not been devised for its measurement. Even today methods are, of course, adequate for only certain phases of its measurement.