HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Abruña, F. Articles by Pearson, R. W. Search for Related Content PubMed Articles by Abruña, F. Articles by Pearson, R. W. Agricola Articles by Abruña, F. Articles by Pearson, R. W.

Effects of Liming on Yields and Composition of Heavily Fertilized Grasses and on Soil Properties Under Humid Tropical Conditions¹

ABSTRACT

Heavily fertilized tropical grasses responded strongly to liming on two typical soils of the Humid Tropics. Liming increased the Ca and decreased the Mn content but did not affect the phosphorus or Mg content of the grasses. Surface applications of limestone were as effective as mixing limestone with the surface soil and one application was as effective as two applications at 2-year intervals.

Exchangeable Al and Mn content of the soils was sharply increased by fertilization alone but was decreased by liming. Base content at all depths sampled was decreased by fertilization alone but was increased by surface liming followed by heavy fertilization. Yields of grasses increased markedly with pH of the upper 6 inches to about 4.8, with bases to 8.0 me. per 100 g. of soil and with decreasing exchangeable Al to 2 me. per 100 g. of soil.

Heavy fertilization of grasses over a 4-year period without liming greatly depressed yields of subsequently planted tobacco and this effect was only partly compensated by reliming prior to planting the tobacco.

¹ This paper covers work carried out cooperatively by the SWCRD, ARS, USDA, and the Agr. Exp. Sta., University of Puerto Rico, Río Piedras, P. R.

² Soil Scientists, SWCRD, ARS, USDA. R. W. Pearson is stationed at Auburn, Ala.; others at the Agr. Exp. Sta., University of Puerto Rico, Río Piedras, P.R.

Received for publication February 3, 1964. Accepted for publication April 17, 1964.