Title:	Potassium management in Humid Tropical Oxisols.
Authors:	CRAVO, M. da S. SMYTH, T. J. BASTOS, J. B.
Affiliation:	MANOEL DA SILVA CRAVO, UEPAE DE MANAUS; THOMAS JOT SMYTH, N.C. STATE UNIVERSITY; JOAQUIM BRAGA BASTOS, UEPAE DE MANAUS.
Date Issued:	1987
Citation:	In: CAUDLE, N. (Ed.). Tropsoils technical report 1985-1986. Raleigh: North Carolina State University, 1987.
Pages:	p. 97-99.
Description:	Abundant rainfall in the Central Brazilian Amazon, and the naturally low cation exchange capacities of the regions' s clayey Oxisols, promote the rapid leaching of potassium from the soils. Native soil K reserves can be expected to be small, since clay mineralogy is predominantly kaolinitic. These conditions suggest that crop production on these soils will require continual K fertilization, and that management systems should be considered to minimize K losses. The objectives of this project were 1) to establish K response curves and soil-test calibration data for the main annual crops cultivated in the region, and 2) to determine whether split applications would improve the efficiency of K fertilization.
Thesagro:	Solo
Type of Material:	Parte de livro
Access:	openAccess
Appears in Collections:	Capítulo em livro técnico (CPAA)