MARC details
000 -LEADER |
fixed length control field |
03643nab a22004817a 4500 |
001 - CONTROL NUMBER |
control field |
39649 |
003 - CONTROL NUMBER IDENTIFIER |
control field |
CO-PlCIA |
005 - DATE AND TIME OF LATEST TRANSACTION |
control field |
20130510181310.0 |
040 ## - CATALOGING SOURCE |
Original cataloging agency |
CO-PlCIA |
Transcribing agency |
CO-PlCIA |
041 ## - LANGUAGE CODE |
Language code of text/sound track or separate title |
spa |
050 ## - LIBRARY OF CONGRESS CALL NUMBER |
Classification number |
37273 |
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
fixed length control field |
120504t1989 000 0sspa d |
100 ## - MAIN ENTRY--PERSONAL NAME |
Personal name |
RAMIREZ, R. |
245 ## - TITLE STATEMENT |
Title |
Estimacion del requerimiento de fertilizante potasico por la yuca con base en el analisis de suelo |
300 ## - PHYSICAL DESCRIPTION |
Extent |
39(1-3):163-177 |
520 ## - SUMMARY, ETC. |
Summary, etc |
Para evaluar la eficiencia de cuatro metodos de extraccion del K del suelo, Morgan, Bray 1, Mehlich 1 y Olsen, se utilizaron los datos de doce experimentos donde se busco la respuesta de la yuca a la fertilizacion potasica, en suelos de reaccion acida. Utilizando el modelo lineal discontinuo se calcularon los rendimientos relativos (RR) para relacionarlos, mediante la regresion, con el K disponible del suelo. Los coeficientes de correlacion mas altos fueron de 0,73 y 0,72 para los metodos de Morgan y Bray 1, respectivamente, mientras que para Mehlich 1 y Olsen fueron de 0,36 y 0,68, respectivamente. La curva de regresion correspondiente al metodo Bray 1 se dividio, tomando en cuenta los indices de fertilidad, en cinco categorias de disponibilidad de K: muy baja, entre 0 y 40 ppm; baja, entre 40 y 70 ppm; media, entre 70 y 100 ppm; alta, entre 100 y 130 ppm y muy alta, mas de 130 ppm. El requerimiento de K2O en kg/ha, calculado para satisfacer las necesidades de la yuca, basado en el K disponible, fue 150 o mas para suelos muy bajos; entre 110 y 150 para suelos bajos; entre 80 y 110 para suelos medios; entre 60 y 80 para suelos altos y menos de 60 para suelos muy altos. (RA) |
-- |
spa |
520 ## - SUMMARY, ETC. |
Summary, etc |
Soil K uptake, using the Morgan, Bray 1, Mehlich 1 and Olsen methods, was calibrated by the response data of cassava to NPK fertilization in twelve field trials, in acid soils of Cojedes state, Venezuela. The relative yields were calculated by the lineal discontinuous model and were related to the available K by regression analysis. The higher correlation coefficients corresponded to Morgan and Bray 1 methods, 0.73 and 0.78, respectively, while for Mehlich 1 and Olsen these were, respectively, 0.36 and 0.68. Five soil categories of available K were established, using the Bray 1 regression curve: very low, with less than 40 ppm of K; low, from 40 to 70 ppm; medium, from 70 to 100 ppm; high, from 100 to 130 ppm; and very high, with more than 130 ppm of K. The K2O fertilization needs for each category of available soil K resulted to be 150 kg/ha or more for very low soil, 110 to 150 kg/ha for low soils, 80 to 110 kg/ha for medium soils, 60 to 80 kg/ha for high soils, and less than 60 kg/ha for very high soils. (AS) |
-- |
eng |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
Topical term or geographic name as entry element |
Manihot esculenta |
9 (RLIN) |
eng |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
Topical term or geographic name as entry element |
Fertilizers |
9 (RLIN) |
eng |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
Topical term or geographic name as entry element |
K |
9 (RLIN) |
eng |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
Topical term or geographic name as entry element |
Soil analysis |
9 (RLIN) |
eng |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
Topical term or geographic name as entry element |
Soil fertility |
9 (RLIN) |
eng |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
Topical term or geographic name as entry element |
ROOT PRODUCTIVITY |
9 (RLIN) |
eng |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
Topical term or geographic name as entry element |
Venezuela |
9 (RLIN) |
eng |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
Topical term or geographic name as entry element |
Manihot esculenta |
9 (RLIN) |
spa |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
Topical term or geographic name as entry element |
Fertilizantes |
9 (RLIN) |
spa |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
Topical term or geographic name as entry element |
K |
9 (RLIN) |
spa |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
Topical term or geographic name as entry element |
ANALISIS DEL SUELO |
9 (RLIN) |
spa |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
Topical term or geographic name as entry element |
Fertilidad del suelo |
9 (RLIN) |
spa |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
Topical term or geographic name as entry element |
PRODUCTIVIDAD DE RAICES |
9 (RLIN) |
spa |
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
Topical term or geographic name as entry element |
Venezuela |
9 (RLIN) |
spa |
653 ## - INDEX TERM--UNCONTROLLED |
Uncontrolled term |
Yuca |
-- |
spa |
653 ## - INDEX TERM--UNCONTROLLED |
Uncontrolled term |
Cassava |
-- |
spa |
653 ## - INDEX TERM--UNCONTROLLED |
Uncontrolled term |
Journal articles |
-- |
spa |
653 ## - INDEX TERM--UNCONTROLLED |
Uncontrolled term |
ArtÃculos en revistas |
-- |
spa |
653 ## - INDEX TERM--UNCONTROLLED |
Uncontrolled term |
Electronic documents |
-- |
spa |
653 ## - INDEX TERM--UNCONTROLLED |
Uncontrolled term |
Documentos electrónicos |
-- |
spa |
653 ## - INDEX TERM--UNCONTROLLED |
Uncontrolled term |
Journal article |
-- |
eng |
773 ## - HOST ITEM ENTRY |
Title |
Agronomia Tropical |
Place, publisher, and date of publication |
1989 |
856 ## - ELECTRONIC LOCATION AND ACCESS |
Uniform Resource Identifier |
<a href="http://www.ceniap.gov.ve/pbd/RevistasCientificas/Agronomia%20Tropical/at3913/Arti/ramirez_r5.htm">http://www.ceniap.gov.ve/pbd/RevistasCientificas/Agronomia%20Tropical/at3913/Arti/ramirez_r5.htm</a> |
998 ## - Data Base |
DataBase |
YUCA |
942 ## - ADDED ENTRY ELEMENTS (KOHA) |
Source of classification or shelving scheme |
Library of Congress Classification |
Koha item type |
Journal Article |