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Smyth, T.J.

Phosphorus management for continuous corn-cowpea production in a Brazilian Amazon Oxisol - 1990 - Printed

Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0002-1962

Although Oxisols occupy extensive areas in the Amazon, few studies have addressed their fertilizer P requirements for sustained, long-term crop production. This field study was conducted to evaluate initial and long-term responses to P rates and placement by corn (Zea mays L.) and cowpea (Vigna unguiculata L.) when grown in annual rotation during five consecutive years in a Xanthic Hapludox (clayey, kaolinitic, isohyperthermic) near Manaus, Brazil. Effects on yields of sole broadcast P rates of 0, 22, 44, 88 and 176 kg ha-1 in split-plot combination with subplot banded P rates of 0, 11, 22 and 44 kg ha-1 were evaluated over 11 total crops. Banded P at 11 kg


English

ISSN: 1435-0645|1435-0645 (Revista en electrónico) 0002-1962

Subjects--Topical Terms:
Agronomic characters
America
Application methods
Cereals
Cropping patterns
Cropping patterns and systems
Crops
Cultivation
Dicotyledons
Economic plants
Elements
Environment
Feed crops
Feed grasses
Fertilizers
Fertilizing
Genetic soil types
Glumiflorae
Grain crops
Gramineae
Grasses
Industrial crops
Inorganic compounds
Leguminosae
Methods
Monocotyledons
Nonmetals
Oil crops
Papilionoideae
Phosphates
Placement
Plant propagation
Plants
Productivity
Profitability
Rosales
Salts
Site factors
Soil types
Soils
South America
Sowing
Starch crops
Sugar crops
Vigna
Yields

Dewey Class. No.: 90-094613