Title: Tropical Soils Research Program
Full Citation
Permanent Link: http://ufdc.ufl.edu/UF00095090/00001
 Material Information
Title: Tropical Soils Research Program
Physical Description: 1 folded sheet : ill. ; 23 cm.
Language: English
Creator: North Carolina State University -- Soil Science Dept
Publisher: Dept of Soil Science, North Carolina State University
Place of Publication: Raleigh, N. C.
Publication Date: 1983
Copyright Date: 1983
Subject: Soils -- Research -- Tropics   ( lcsh )
Soils -- Research -- Latin America   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
Spatial Coverage: Latin America
General Note: Brochure about the program.
Statement of Responsibility: North Carolina State University, Soil Science Department.
 Record Information
Bibliographic ID: UF00095090
Volume ID: VID00001
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 433076022

Full Text


Latitude: 5045'S

Elevation: 182 meters

Annual Rainfall: 2200 millimeters, with precipitation
exceeding potential evapo-
transpiration nine months of the

Soil: Typic Paleudult, fine loamy, siliceous, iso-
hyperthermic (Yurimaguas series)

FCC Designation for Predominant Soils: SLeak

Depth Clay pH
(cm) (%) (H20)


The principal field site for the Program is located in
a tropical rainforest approximately 4 km from
Yurimaguas on the Amazon headwaters of the Selva
Baja. This was chosen because its climatic, soil and
socio-economic constraints are typical of much of
the Amazon Basin. Researchers at the Yurimaguas
Experiment Station are developing fertilization regimes
and crop rotation systems to permit the continuous
cultivation of lands formerly under shifting cultivation.

Exch. Exch. Exch. Exch. Effec.
Ca Mg K Al CEC Al Sat.
.--------- -(meq/100cc)---------- (%)

0-5 6 3.8 1.25 0.84 0.37
5-13 10 3.7 0.84 0.05 0.03
13-43 15 3.9 0.42 0.05 0.03


0.29 0.03
0.18 0.03
0.17 0.06

0.20 2.05
0.04 2.63
0.03 3.11

0.01 0.02
0.01 0.03
0.03 0.04


3.49 59
2.76 95 q %
3.24 96
3.20 98
4.58 98 /,L"
3.94 96




To maintain current levels of per capital food
production, about 200 million additional hectares.
of new lands must be brought under cultivation before
the end of this century. This quantity exceeds the
amount of total harvested cropland in the U.S. Since
most fertile soils are already under intensive cultivation,
future production increases must come from cultivating
the more marginal lands in the tropics. The vast areas
of acid, infertile soils of the humid tropics and acid
savannas offer the largest potential because of
favorable temperatures, rainfall and topography. These
soils, classified as Oxisols and Ultisols, are fragile and
require proper management to be productive.
Since 1971, North Carolina State University's Tropical
Soils Research Program has been developing improved
soil management systems for increasing and sustaining
food production on Oxisols and Ultisols. The program
is closely linked to ongoing research in North Carolina,
since the predominant soils of the state are also acid,
infertile Ultisols.
The Tropical Soils Research Program has graduate
programs at the M. S. and the Ph. D. levels. In addition,
the program offers non-degree training on practical
soil management for the tropics.


* Continuous cultivation in the Amazon Basin is
agronomically possible and economically

* In-field trials by local farmers validate the
management recommendations resulting from
program research.

* Yurimaguas technology is being successfully
employed in similar areas of the humid tropics.

* Soil Fertility Capability Classification (FCC)
system allows accurate and reliable
interpretations of soil survey data for practical


NCSU's Tropical Soils Research Program conducts
cooperative research with the Instituto Nacional de
Investigation y Promocion Agraria (INIPA) of Peru,
the Empresa Brasileira de Pesquisa Agropecuaria
(EMBRAPA) in Brazil, the Indonesian Agency for
Agricultural Research and Development (AARD), and
the Soils Research Institute (CSR) of Indonesia.
The program is a constituent part of TROPSOILS,
the Title XII-sponsored Soil Management Coolaborative
Research Program conducted in cooperation with
Cornell University, the University of Hawaii and Texas
A&M University. Close collaborative linkages exist
with various international centers, particularly CIAT,
NCSU is one of the sponsoring institutions of
REDINAA (Amazon Agricultural Research Network)
and is involved in the development of the International
Board on Soil Resources and Management (IBSRAM).


The U. S. Agency for International Development
provides the major financial support through its Title
XII program and the USAID Mission to Peru. Other
sources of support include the Rockefeller Foundation's
Fragile Ecosystems Program, the Peruvian Government
through INIPA and CORDELOR (Corporacion de
Desarrollo de Loreto), EMBRAPA, Indonesia AARD,
and the Potash/Phosphate Institute of North America.

( of January 1983)
Soil science Departm ead:
Robert H. iller, Ph.D., Soil Microbiology
Pedro A. Sanchez, Ph.D., Soil Management
John J. Nicholaides, Ill, Ph.D., Soil Fertility
Research Leaders:
Dale E. Bandy, Ph.D., Soil Management, Peru
T. Jot Smyth, Ph.D., Soil Fertility, Brazil
Michael K. Wade, Ph.D., Soil Fertility, Indonesia
Yurimaguas Research Staff:
Robert E. McCollum, Ph.D., Soil Fertility
Jose R. Benites, Ph.D., Technology Transfer
Javier Alva, Ing. Agr., Rice Specialist
Luis Arevalo, Ing. Agr., Soil Chemistry
Marco Galvez, Ing. Agr., Corn Specialist
Mwenja Gichuru, M.S., Soil Fertility
Ruben Mesia, Ing. Agr., Technology Transfer
Marco Nurena, B.S., Technology Transfer
Jorge Perez, Ing. For., Agroforestry
Rodolfo Schaus, Ing. Agr., Pastures
Raleigh Research Staff:
Julio Alegre, M.S., Soil Physics
Miguel Ara, M.S., Pastures (to Peru, '84)
Miguel Ayarza, M.S., Pastures (to Peru, '83)
Stanley W. Buol, Ph.D., Soil Genesis, Morphology
D. Keith Cassel, Ph.D., Soil Physics
Arthur J. Coutu, Ph.D., Economics
Fred R. Cox, Ph.D., Soil Fertility
Charles B. Davey, Ph.D., Forestry
Oliver Dubois, B.S., Economics (to Peru, '84)
Dan Gill, B.S., Soil Fertility (to Peru, '83)
Rob Hoag, M.S., Soil Genesis (to Peru, '84)
Lisa Katz, B.S., Soil Fertility
Ibere Lins, M.Ag., Soil Fertility (to Brazil, '84)
Karim Makarim, M.S., Land Clearing (to Indonesia, '83)
Gordon S. Miner, Ph.D., Soil Fertility
Jane Mt. Pleasant, M.S., Weed Control (to Peru, '83)
Laurie Newman, B.S., Soil Genesis (to Peru, '83)
George C. Naderman, Ph.D., Soil Management
Jamie Powell, B.S., Lab Technician
Wayne Robarge, Ph.D., Soil Chemistry
Peter Rohman, B.S., Soil Fertility
Paul Smithson, M.S., Lab Technician
Arthur G. Wollum, Ph.D., Soil Microbiology
Larry Szott, M.S., Agroforestry (to Peru, '83)
Administrative Support Staff:
Dawn M. Silsbee, Administrative Secretary, Raleigh
Bertha I. Monar, Administrative Assistant, Lima
Mariela Gonzalez, Bilingual Secretary, Lima
Felipe del Castillo, Administrative Assistant, Yurimaguas
Sue Florindez, Bilingual Secretary, Yurimaguas


* Continuous cultivation systems in Amazon soils

* Land clearing methods

* Soil nutrient dynamics

* Improving fertilizer efficiencies

* Management of soil physical properties

* Low input crop production systems

* Selecting plants tolerant to acid soils

* Improving subsoil fertility

* Managed fallows

* Legume-based pastures

* Agroforestry

* Paddy rice on alluvial soils

* Soil characterization and classification

* Fertility capability classification

* Economic interpretations

* On-farm technology validation

* Yurimaguas training center

* Post-graduate training

* Extrapolation to other regions

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