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Evaluation of Laboratory Tests on Organic Soils for Prediction of Phosphorus Availability
Author(s) -
Okruszko Henryk,
Wilcox G. E.,
Warren G. F.
Publication year - 1962
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/sssaj1962.03615995002600010020x
Subject(s) - muck , yield (engineering) , soil water , peat , phosphorus , chemistry , acetic acid , mathematics , human fertilization , mineralogy , agronomy , environmental science , soil science , biology , ecology , organic chemistry , materials science , metallurgy
Nineteen muck and peat soils from northern Indiana were subjected to different laboratory analyses in an effort to determine what criterion might allow prediction of percentage yield that would be obtained with respect to P fertilization. Percentage yield of ladino clover was related to log of P in extracts of 0.5 N HCl, 0.002 N H 2 SO 4 , 0.5 N acetic acid, and H 2 O in the order r = 0.867, 0.732, 0.786, and 0.887, respectively. The use of ratios of cations to P in the HCl extract increased the r values for the relationship between yields and predictive factors to r = ‐0.919 for the Fe + Al/P ratio and yield relationship. When P in HCl extract, P in H 2 SO 4 extract, Ca/P ratio, and Fe/P ratio in HCl extract were combined in their relationship to percentage yield, R = 0.948 was obtained. From the data obtained a table was set up with cation/P ratios corresponding to P fertility level of muck soil.