TY  - JA
AU  - Smyth,T.J.
AU  - Cravo,M.S.
TI  - Phosphorus management for continuous corn-cowpea production in a Brazilian Amazon Oxisol
SN  - 1435-0645
U1  - 90-094613 
PY  - 1990///
KW  - Agronomic characters
KW  - AGROVOC
KW  - America
KW  - Application methods
KW  - Cereals
KW  - Cropping patterns
KW  - Cropping patterns and systems
KW  - Crops
KW  - Cultivation
KW  - Dicotyledons
KW  - Economic plants
KW  - Elements
KW  - Environment
KW  - Feed crops
KW  - Feed grasses
KW  - Fertilizers
KW  - Fertilizing
KW  - Genetic soil types
KW  - Glumiflorae
KW  - Grain crops
KW  - Gramineae
KW  - Grasses
KW  - Industrial crops
KW  - Inorganic compounds
KW  - Leguminosae
KW  - Methods
KW  - Monocotyledons
KW  - Nonmetals
KW  - Oil crops
KW  - Papilionoideae
KW  - Phosphates
KW  - Placement
KW  - Plant propagation
KW  - Plants
KW  - Productivity
KW  - Profitability
KW  - Rosales
KW  - Salts
KW  - Site factors
KW  - Soil types
KW  - Soils
KW  - South America
KW  - Sowing
KW  - Starch crops
KW  - Sugar crops
KW  - Vigna
KW  - Yields
N1  - Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0002-1962
N2  - 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
T2  - Agronomy Journal
ER  -