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Fertilizer Studies with Groundnuts on the Brown Sands of Guyana. I. Effect of Nitrogen, Inoculum, Magnesium, and Fritted Micronutrients 1
Author(s) -
Chesney H. A. D.
Publication year - 1975
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1975.00021962006700010003x
Subject(s) - loam , agronomy , fertilizer , nitrogen , soil water , human fertilization , inoculation , micronutrient , chemistry , biology , horticulture , ecology , organic chemistry
The Brown Sands are a dominant soil group in South Guyana. They are coarse textured ‐ sand to sandy loam; highly leached; acid, and, although not naturally fertile, they appear suitable for large scale cultivation of groundnuts [ Arachis hypogoea (L.)]. Two experiments were conducted on these soils to determine the effect of fertilization and inoculation on crop performance. In the nitrogen × inoculum ( Rhizobium japonicum ) series, N did not influence yield. It caused a decrease in nodulation with the effect becoming more marked with constant cropping. Inoculum up to 226 g/27 kg seed increased yields but decreased nodulation only at the last of three plantings. Both Mg and fritted micronutrients had no effect on yields; these results were difficult to explain considering the highly leached nature of this soil.