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Effect of liming levels and Ca:Mg ratios on yield, nitrogen content and nodulation of soyabeans grown in acid Cerrado soil
Author(s) -
MUCHOVEJ R. M. C.,
BORGES A. C.,
NOVAIS R. F.,
THIEBAUT J. T. L.
Publication year - 1986
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1986.tb00024.x
Subject(s) - lime , shoot , dry matter , nitrogen fixation , saturation (graph theory) , nitrogen , chemistry , horticulture , dry weight , agronomy , yield (engineering) , zoology , soil acidification , botany , soil ph , biology , soil water , mathematics , ecology , materials science , organic chemistry , metallurgy , paleontology , combinatorics
SUMMARY The effect of four lime levels and of five ratios of Ca: Mg on nodulation, nitrogen fixation and yield of soyabean var. UFV‐1 was studied under greenhouse conditions, using a Typic Haplorthox soil. Dry matter production of top growth was relatively constant for soil Ca: Mg ratios ranging from 0.26: 1 to 24: 1 and a similar production level was sustained for A1 saturation values from 0 to 43%. Nodulation (number and dry weight of nodules) increased with increasing A1 saturation from 0 to 43%. The greatest increase was observed when Al saturation was raised from 0 to 2 or 3%. The N accumulated in the shoots, decreased with the increase in the percent A1 saturation, showing that the largest number of nodules does not necessarily result in greatest accumulation of N in shoots.