SSSAJ Journal of Natural Resources and Life Sciences Education
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Soil Sci Soc Am J 18:489-493 (1954)
© 1954 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Lugo-López, M. A.
Right arrow Articles by Samuels, G.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Lugo-López, M. A.
Right arrow Articles by Samuels, G.
Agricola
Right arrow Articles by Lugo-López, M. A.
Right arrow Articles by Samuels, G.

Soil Organic Matter Levels and Crop Yields in Puerto Rico1

M. A. Lugo-López, J. A. Bonnet, E. Hernández-Medina, P. Landrau, Jr. and G. Samuels2

ABSTRACT

No increases in organic-matter content were observed in some latosols of Puerto Rico with an open porous structure and low fertility level when treated with different quantities of velvetbean green manure, sugarcane trash, and filter-press cake. Increased yields of corn were obtained only when the soil was treated with velvet bean green manure, probably because of increased nitrogen supply.

Definite increases in organic-matter content were obtained with the above treatments in heavy-textured nonlateritic soils of moderate fertility, but unfavorable physical conditions. In this case, increased yields of sugarcane and pineapple were obtained probably due to the favorable effect of increased amounts of organic matter on the physical conditions of the soils. The seven field experiments reported here have been established for relative short periods only, not over 7 years, but some of them are scheduled for long-time duration.

NOTES

1 Joint contribution from the Departments of Soils, Plant Physiology, and Agronomy and Horticulture, Agr. Exp. Sta., University of Puerto Rico, Rio Piedras, P. R. Presented before Section VI, Soil Science Society of America, Dallas, Texas, Nov. 20, 1953.

2 Associate Soil Scientist, Head Soils Department, Assistant Plant Physiologist, Assistant Agronomist, and Plant Physiologist, respectively.

Received for publication April 15, 1954.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1954 by the Soil Science Society of America.