Results 21 to 30 of about 717 (170)
Irrigation well water: Essential nutrient contents and other properties
Agrosystems, Geosciences &Environment, Volume 4, Issue 1, 2021., 2021 Abstract Water nutrient concentrations and other properties were surveyed by sampling water from 642 irrigation wells in Nebraska. The amount of Ca, Mg, S, and Cl applied in irrigation exceeds removal in 15 Mg ha−1 of corn (Zea mays L.) grain harvest for most wells.
Charles S. Wortmann
wiley +1 more source
Status and outlook for acaricide and insecticide discovery
Pest Management Science, Volume 77, Issue 1, Page 64-76, January 2021., 2021 Since 2008, around 89% of the launched products (one acaricide and eight insecticides) have contained halogen atoms, in most cases fluorine, but also ‘mixed’ halogen atoms, for example chlorine and fluorine. Of these, three insecticides have been launched as racemic mixtures of enantiomers and one as an enantiomerically pure semi‐synthetic natural ...
Peter Jeschke
wiley +1 more source
, 2020 This guide discusses general principles that apply to most types of chemigation ...
Allen, L. Neil +7 more
core +1 more source
Expert system to select a proper chemigation-injection system according to field condition [PDF]
Archives of Agriculture Sciences Journal, 2021 The aim of this research is to help in selecting an appropriate chemical injector in certain situations. Systems under investigation included: (1) Bypass pressure differential tank, (2) Piston injection pump, (3) With suction pipe of irrigation pump, (4)
A. El Lithy, A. Elglaly
doaj +1 more source
Geometry and head loss in Venturi injectors through computational fluid dynamics [PDF]
Engenharia Agrícola, 2016 To determine the influence of geometry on the hydrodynamic behavior of Venturi injectors, using computational fluid dynamics techniques, we studied, at the Universitat Politècnica de València, Valencia, Spain, the geometric parameters that exert the most
Juan Manzano +4 more
doaj +1 more source
Potassium distribution in drip irrigation with fertigation for different injection distances in the main line [PDF]
Engenharia Agrícola, 2014 The purpose of this research was to evaluate the K2O distribution uniformity by surface drip irrigation at Universitat Politecnica de Valencia, Valencia, Spain (39º 29′ N, 0º 23′ W, 20 m).
Guilherme V. do Bomfim +4 more
doaj +1 more source
Chemigation in the Pacific Northwest [PDF]
, 1992 Chemigation is the injection of agricultural chemicals such as fertilizers, herbicides, and insecticides into an irrigation system. This bulletin discusses characteristics of these chemicals, safety equipment, irrigation systems, and application rates ...
Trimmer, Walter L. +5 more
core +4 more sources
, 2006 This fact sheet covers advantages and disadvantages of chemigation, laws and regulations, and chemigation management practices.
Buffington, E. J., author +2 more
openaire +3 more sources
Using Chemigation Safely and Effectively: Training Manual [PDF]
, 2008 Table of Contents Acknowledgements Introduction Factors Affecting Chemigation Practice Irrigation Systems Chemigation Equipment and Safety Devices Calibration Procedures Management Laws and Regulations Appendix A Summary - Nebraska Chemigation Act ...
core +2 more sources
Ciência Rural, 1996 Este experimento teve como objetivo avaliar a concentração de nitrogênio, fósforo e potássio na parte aérea do feijoeiro em resposta à irrigação, fertirrigação com nitrogênio parcelado e aplicação de micronutrientes via semente.
Eder João Pozzebon +4 more
doaj +1 more source