Now showing items 1-10 of 408
Comparative procedures for the sample decomposition of rocks used in organic agriculture and the determination of Cu, Fe, Mn, and Zn by FAAS
(Perkin-elmer Corp, 2004-11-01)
The aim of this work was to develop an appropriate sample preparation procedure for the flame atomic absorption spectrometry determination of Cu, Fe, Mn, and, Zn in rocks used in organic agriculture as a source of macro- ...
Evaluation of the nitrate content in leaf vegetables produced through different agricultural systems
(Taylor & Francis LtdAbingdonInglaterra, 2005)
Test procedure for variable rate fertilizer on coffee
(UNIV ESTADUAL MARINGA, PRO-REITORIA PESQUISA POS-GRADUACAO, 2010)
The objective was to develop and test a procedure for applying variable rates of fertilizers and evaluate yield response in coffee (Coffea arabica L.) with regard to the application of phosphorus and potassium. The work ...
Extraction of cellulose nanowhiskers from natural fibers and agricultural byproducts
In this work the feasibility of extracting cellulose from cotton, sisal and flax fibers, corn stover and rice husk by means of usual chemical procedures such as acid hydrolysis, chlorination, alkaline extraction, and ...
PRACTICAL LAND GRADING BASED ON LEAST SQUARES.
Practical methods for land grading design of a plane surface for rectangular and irregularly shaped fields based on a least squares analysis are presented. The least squares procedure leads to a system of three linear ...
TOTAL AND ORGANIC PHOSPHORUS IN CHILEAN VOLCANIC SOILS
(Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, 2003)
Entomopathogenic nematodes in agricultural areas in Brazil
Entomopathogenic nematodes (EPNs) (Steinernematidae and Heterorhabditidae) can control pests due to the mutualistic association with bacteria that kill the host by septicemia and make the environment favorable for EPNs ...
Genetic parameters for rank of the Santa inês sheep in agricultural fairs using bayesian procedures
The aim of this study was to estimate the genetic parameters for the ability of a sheep to rank among the top three in its age category (ABI3) and for its total score (TS) on the judgement championships held in different ...