Éditeur(s) : Université des Antilles. Service commun de la documentation University of West Indies, Trinidad &Tobago
Extrait de : 52e congrès annuel de la Société caribéenne des plantes alimentaires / 52nd annual meeting of the Caribbean food crops society (CFCS), du 10 au 16 juillet 2016. INRA, CFCS
Description : Crop nutrient management is a critical component of productivity and quality. Commercial horticulture has relied almost exclusively on inorganic nutrient sources to satisfy plant nutritional requirements. Compost tea represents a sustainable alternative technology but its use has not been extensively researched. A factorial experiment was conducted subjecting lettuce plants to four increasing concentrations of compost tea; 0, 5, 10 and 20 % (m/v) applied at either 100 or 200 cm3 plant-1 day-1, for 30 days. At the end of the trial, measurements were made of leaf area (LA), yield, shoot and root dry mass (DM), root to shoot ratio, and nitrogen (N) and phosphorus (P) contents of shoots and roots. Compost tea concentration significantly (P < 0.05) affected all growth indices showing a similar pattern. Increasing concentration up to 10 % (m/v), positively improved growth and yield above the control. Increasing further to 20 % (m/v) reduced LA, yield and dry mass. For these variables, applying compost tea at 200 cm3 plant-1 day-1 resulted in a better response. Increasing concentration of compost tea showed a directly proportional relationship to shoot and root N content. However, the effect was non-significant for P. Yield and shoot DM were affected by the combination of compost tea concentration and application rate. Similar patterns of increasing yield were seen for increasing concentration within both rates however, the differences were significant for all concentrations at the higher application rate. Application of 200 cm3, 5 % compost tea resulted in the greatest yield, shoot and root DM. In addition to root DM, root surface area was significantly correlated with yield and shoot DM. Compost tea used at appropriate concentrations improved root growth and lettuce productivity.
Siècle(s) traité(s) : 21
Droits : CC-BY-NC-ND - Attribution - Pas d'utilisation commerciale - Pas de modification
Permalien : http://www.manioc.org/fichiers/V16281
V16281

Éditeur(s) : University of Florida University of Florida ( Gainesville FL )
Résumé : (Bibliography) Includes bibliographical references (p. 55).
(Statement of Responsibility) J. Alvarez, P.E. Hildebrand, and J.A. Nova.
Caption title.
Printed in Small Farms Systems of the Caribbean, Proceedings of the 20th Annual Meeting of the Caribbean Food Crops Society (St. Croix, U.S. Virigin Islands, October 21-26, 1984).
Dominican Republic
Dominican Republic
Dominican Republic
Dominican Republic

76891998

Éditeur(s) : University of West Indies, Trinidad &Tobago Université des Antilles. Service commun de la documentation
Extrait de : 52e congrès annuel de la Société caribéenne des plantes alimentaires / 52nd annual meeting of the Caribbean food crops society (CFCS), du 10 au 16 juillet 2016. INRA, CFCS
Description : Carbon dioxide (CO2) accounts for the largest proportion (74%) of total greenhouse gas (GHG) emissions globally, with agricultural activities contributing approximately 25% of this gas. Opportunities to reduce the emissions in the sector can therefore contribute significantly to mitigating global climate change. Ag-lime is used extensively to alleviate problems of soil acidity and the potential for this material to contribute to C sequestration in soils is gaining interest among researchers. A laboratory experiment using C-13 isotopic labelling techniques was therefore established to answer the following questions: 1) Is there a potential for sequestering C using ag-lime in Trinidad acid soils? 2) Does enhancing soil microbial respiration by applying labile organic amendments enhance the C sequestration potential of ag-lime? 3) Are lime-derived C (LDC) estimates from non-isotopic difference technique comparable to that from the C- 13 isotopic labelling technique? The results ascertained for the study showed significant (P<0.05) differences between the LDC estimates from the two techniques with the non-isotopic techniques yielding higher estimates. Over the 32- day experiment, between 16.4 to 85.4% of the ag-lime C was released as CO2 with values being lower for the Piarco soil. The LDC in the CO2 was also significantly (P<0.05) lower for the poultry litter treatments comparison to the other organic amendments for the Piarco soil but not the Nariva soil. This effect may not have been as a result of an enhancement of the carbon sequestration potential of the ag-lime due to an elevation in soil microbial respiration since the LDC in the glucose-amended soils did not differ significantly from the no-amendment control soils.
Siècle(s) traité(s) : 21
Droits : CC-BY-NC-ND - Attribution - Pas d'utilisation commerciale - Pas de modification
Permalien : http://www.manioc.org/fichiers/V16308
V16308

Éditeur(s) : University of Florida Université des Antilles. Service commun de la documentation
Extrait de : 52e congrès annuel de la Société caribéenne des plantes alimentaires / 52nd annual meeting of the Caribbean food crops society (CFCS), du 10 au 16 juillet 2016. INRA, CFCS
Description : Under tropical and sub-tropical climates, a sustainable development of agriculture is challenging because of the pest pressure with favorable weather conditions. Implementation of appropriate cropping systems including growing cover crops and crop rotation plays a critical role, which can break up the food chain and life cycles of field pests. Some field trials have demonstrated that among all tested summer cover crops, sunn hemp (Crotalaria juncea L. cv. Tropic sun) can grow vigorously during the rainy summer, cover the land quickly and densely, and it can produce a large quantity of biomass in two to three months. More importantly, sunn hemp can suppress soil root-knot nematodes via releasing some nematicides through its roots and through the decomposition of plant residues. Therefore, growing cover crop â? ? sunn hemp during the crop off season and rotating with valuable vegetable crops in the growing season has become a promising cropping system under the subtropical climate. Such a result may have a potential to be implemented in Caribbean countries to improve the sustainable development of agriculture.

Droits : CC-BY-NC-ND - Attribution - Pas d'utilisation commerciale - Pas de modification
Permalien : http://www.manioc.org/fichiers/V16313
V16313

Éditeur(s) : Sector Pâublico Agropecuario y de Alimentaciâon, Instituto de Ciencia y Tecnologâia Agrâicolas Sector Pâublico Agropecuario y de Alimentaciâon, Instituto de Ciencia y Tecnologâia Agrâicolas ( Guatemala C.A )
Résumé : (Statement of Responsibility) Victor Claudio Cordâon E..
Cover title.
"Guatemala, C.A. ; Noviembre, 1985."
"Disciplina de Apoyo: Socioeconomâia Rural."
Guatemala -- Zacapa
Guatemala
Zacapa
Guatemala
Zacapa

74279255

Éditeur(s) : Sector Público Agropecuario y de Alimentación, Instituto de Ciencia y Tecnología Agrícolas Sector Público Agropecuario y de Alimentación, Instituto de Ciencia y Tecnología Agrícolas ( Guatemala C.A )
Résumé : (Statement of Responsibility) Miguel Angel García.
Cover title.
"Guatemala, C.A. ; Abril de 1982."
"Disciplina de Apoyo, Socioeconomía Rural."
(Funding) Electronic resources created as part of a prototype UF Institutional Repository and Faculty Papers project by the University of Florida.
Guatemala -- Quetzaltenango
Guatemala
Quezaltenango
Guatemala
Quezaltenango
Guatemala
Quezaltenango
Guatemala
Quezaltenango

72823383

Éditeur(s) : Caribbean Food Crops Society
Description : Ce document recense toutes les interventions qui ont eu lieu lors de la réunion annuelle de la Caribbean Food Crops Society. Ces interventions ont pour objet le développement des cultures vivrières, la lutte contre les nuisibles, le compostage, les systèmes d'agro-écologie, l'utilisation des ressources biologiques tropicales... Elles s'appuient sur des expérimentations effectuées dans différents pays de la Caraïbe (voire d'autres pays tropicaux). Les changements météorologiques, la dépendance alimentaire, la croissance démographique obligent la Caraïbe à se lancer dans la transition agroécologique et énergétique, en lien avec les nouveaux défis adressés par l?émergence de la bioéconomie.

Droits : Ce document est protégé par le droit d'auteur. Il ne peut en aucun cas être utilisé sans l'autorisation de l'auteur et des ayant droits
Permalien : http://www.manioc.org/recherch/T17046
T17046

Éditeur(s) : El Programa El Programa ( Panama )
Résumé : (Numbering Peculiarities) Some years issued in parts.
Title varies slightly: <1969-> Reunion anual del Programa Cooperativo Centroamericano Para el Mejoramiento de Cultivos Alimenticios.
Place of publication varies.
Description based on: 11. (16-19 marzo, 1965); title from cover.
(Funding) Electronic resources created as part of a prototype UF Institutional Repository and Faculty Papers project by the University of Florida.
Central America
Central America
Developing countries

000542102
24313270
ACW5673

Éditeur(s) : s.n., s.n.,
Résumé : Caption title.
"Propuesta de Proyecto."
"Preliminar para revisión, 27/07/73."
"Asesorado por: Programa de maíz ; Programa de frijol ; Patología vegetal."
El Salvador.
El Salvador.
El Salvador.
El Salvador.
El Salvador.

162150458

Éditeur(s) : Instituto de Ciencia y Tecnologâia Agrâicolas, Sector Pâublico Agrâicola, Ministerio de Agricultura Instituto de Ciencia y Tecnologâia Agrâicolas, Sector Pâublico Agrâicola, Ministerio de Agricultura ( Guatemala C.A )
Résumé : (Statement of Responsibility) Arturo Campos.
Cover title.
"Guatemala, C.A."
"Disciplina de Apoyo, Socioeconomâia Rural."
"19/11/81"--Leaf 26.
Guatemala -- Chimaltenango
Guatemala
Chimaltenango (Dept.)
Guatemala
Chimaltenango (Dept.)
Guatemala
Chimaltenango (Dept.)
Guatemala
Chimaltenango (Dept.)

74822106

Éditeur(s) : Instituto de Ciencia y Tecnologâia Agrâicolas, Sector Pâublico Agrâicola, Ministerio de Agricultura Instituto de Ciencia y Tecnologâia Agrâicolas, Sector Pâublico Agrâicola, Ministerio de Agricultura ( Guatemala C.A )
Résumé : (Statement of Responsibility) Essaâu Samayoa G. ... et al..
Cover title.
"Guatemala, C.A. ; Noviembre, 1978."
"Disciplina de Apoyo: Socioeconomâia Rural."
Guatemala -- Chimaltenango
Guatemala
Chimaltenango (Dept.)
Guatemala
Chimaltenango (Dept.)

74820665

Éditeur(s) : Instituto de Ciencia y Tecnologâia Agrâicolas, Ministerio de Agricultura, Ganaderâia y Alimentaciâon Instituto de Ciencia y Tecnologâia Agrâicolas, Ministerio de Agricultura, Ganaderâia y Alimentaciâon ( Guatemala C.A )
Résumé : (Statement of Responsibility) Miguel Angel Garcâia, Leonzo H. Godâinez.
Cover title.
"Guatemala, C.A. ; Junio, 1982."
"Disciplina de Apoyo: Socioeconomâia Rural."
Guatemala -- Quezaltenango
Guatemala -- Totonicapâan
Guatemala
Quezaltenango (Dept.)
Guatemala
Totonicapâan (Dept.)
Guatemala
Quezaltenango (Dept.)
Guatemala
Totonicapâan (Dept.)

76763567

Éditeur(s) : University of Florida University of Florida ( Gainesville FL )
Résumé : (Bibliography) Includes bibliographical references (p. 55).
(Statement of Responsibility) J. Alvarez, P.E. Hildebrand, and J.A. Nova.
Caption title.
Printed in Small Farms Systems of the Caribbean, Proceedings of the 20th Annual Meeting of the Caribbean Food Crops Society (St. Croix, U.S. Virigin Islands, October 21-26, 1984).
Dominican Republic
Dominican Republic
Dominican Republic
Dominican Republic

76891998

Éditeur(s) : El Programa El Programa ( Panama )
Résumé : (Numbering Peculiarities) Some years issued in parts.
Title varies slightly: <1969-> Reunion anual del Programa Cooperativo Centroamericano Para el Mejoramiento de Cultivos Alimenticios.
Place of publication varies.
Description based on: 11. (16-19 marzo, 1965); title from cover.
(Funding) Electronic resources created as part of a prototype UF Institutional Repository and Faculty Papers project by the University of Florida.
Central America
Central America
Developing countries

000542102
24313270
ACW5673

Éditeur(s) : Instituto de Ciencia y Tecnologâia Agrâicolas, Sector Pâublico Agropecuario y de Alimentaciâon Instituto de Ciencia y Tecnologâia Agrâicolas, Sector Pâublico Agropecuario y de Alimentaciâon ( Guatemala C.A )
Résumé : (Statement of Responsibility) Jorge Cardona Orellana.
Cover title.
"Guatemala, C.A. ; Julio de 1982."
"Socioeconomâia Rural, Disciplina de Apoyo."
Guatemala -- Chiquimula
Guatemala
Chiquimula (Dept.)
Guatemala
Chiquimula (Dept.)

75967778

Éditeur(s) : Agency for International Development Agency for International Development
Résumé : "Project impact evaluation no."
"September 1980."
North America -- Guatemala -- Caribbean
Guatemala.
Guatemala.
Guatemala.
Guatemala.

163576873

Éditeur(s) : Instituto de Ciencia y Tecnologâia Agrâicolas, Sector Pâublico Agrâicola, Ministerio de Agricultura Instituto de Ciencia y Tecnologâia Agrâicolas, Sector Pâublico Agrâicola, Ministerio de Agricultura ( Guatemala C.A )
Résumé : (Statement of Responsibility) Leonzo H. Godâinez, Miguel A. Garcâia de Leâon, Josâe Guillermo Pelâaez G.
Cover title.
"Guatemala, C.A. ; Diciembre, 1978."
"Disciplina de Apoyo: Socioeconomâia Rural."
Guatemala -- Quezaltenango
Guatemala -- Totonicapâan
Guatemala
Quezaltenango (Dept.)
Guatemala
Quezaltenango (Dept.)
Guatemala
Totonicapâan (Dept.)
Guatemala
Totonicapâan (Dept.)

76763298

Éditeur(s) : Instituto de Ciencia y Tecnologâia Agrâicolas, Sector Pâublico Agrâicola, Ministerio de Agricultura Instituto de Ciencia y Tecnologâia Agrâicolas, Sector Pâublico Agrâicola, Ministerio de Agricultura ( Guatemala C.A )
Résumé : (Statement of Responsibility) Essaâu J. Samayoa G.
Cover title.
"Guatemala, C.A. ; Julio 1980."
"Disciplina de Apoyo: Socioeconomâia Rural."
Guatemala -- Chimaltenango
Guatemala
Chimaltenango (Dept.)
Guatemala
Chimaltenango (Dept.)
Guatemala
Chimaltenango (Dept.)

74821645

Éditeur(s) : HAL CCSD Springer International Publishing
Résumé : The intensive farming practices that have been developed over the past 60 years are based mainly on the use of chemical inputs such as fertilisers and pesticides, mechanical tillage and monoculture. The limitations of these methods are now clear: long-term degradation of soil fertility, impacts on the environment and human health, high consumption of fossil fuels, low efficiency of inputs and threats to food security in a context of climate change. Would farming practices that rely on the activation of ecological processes be an alternative to achieve a balance between high productivity and environmental preservation? While many studies suggest a positive relationship between soil biodiversity and ecosystem services, there is considerable debate on the form such agricultural systems should take. This study reviewed the state of current knowledge and identified aspects requiring further research to achieve the aim of sustainable intensification of agriculture. The following major points emerged: 1) Most studies focused on the evaluation of individual practices. However, changes in farmers’ cropping practices to take advantage of soil biodiversity services would need to manage not only the interactions between various practices but also the trade-off between the technical and socio economic constraints of cropping systems. Advances in agricultural system design approaches may help to ensure appropriate trade-offs. 2) More attention should be given to drawing on knowledge from different sources: laboratory studies focusing on the ecological functions of soil biodiversity, experimental surveys on farmers’ fields to rank the farming practices and processes to be included in site-specific models, and on- station experiments to test hypotheses and acquire additional reference material. 3) Whereas advances in technical and scientific knowledge provide an increasing number of relevant indicators for characterizing biodiversity and ecological functions, studies are rarely targeted at the development of indicators that are accessible to farmers or their technical advisors. The lack of indicators accessible to grassroots players for evaluating the impacts of their decisions on soil biodiversity remains a serious obstacle to the development of innovative agro-ecological systems.
Sustainable Agriculture Reviews 14

ISBN : 978-3-319-06015-6
hal-01268743
https://hal.archives-ouvertes.fr/hal-01268743
DOI : 10.1007/978-3-319-06016-3_5
PRODINRA : 270786

Éditeur(s) : INRA : Institut National de la Recherche Agronomique Université des Antilles. Service commun de la documentation Caribbean Food Crops Society (CFCS)
Extrait de : 52e congrès annuel de la Société caribéenne des plantes alimentaires / 52nd annual meeting of the Caribbean food crops society (CFCS), du 10 au 16 juillet 2016. INRA, CFCS
Description : Synthèse des deux jours d'exposés du 527me congrès de la CFCS avec des intervenants multiples, 11-12 juillet 2016.
Siècle(s) traité(s) : 21
Droits : CC-BY-NC-ND - Attribution - Pas d'utilisation commerciale - Pas de modification
Permalien : http://www.manioc.org/fichiers/V16319
V16319