Search Results - "Haggar, J."

Coffee agroecosystem performance under full sun, shade, conventional and organic management regimes in Central America by Haggar, J., Barrios, M., Bolaños, M., Merlo, M., Moraga, P., Munguia, R., Ponce, A., Romero, S., Soto, G., Staver, C., de M. F. Virginio, E.

“…Changes in coffee economics are leading producers to reduce agrochemical use and increase the use of shade. Research is needed on how to balance the…”
Get full text

Primary productivity and resource partitioning in model tropical ecosystems by Haggar, Jeremy P., Ewel, John J.

“…The diversity of plant life forms in tropical forests affords the opportunity for assembly of plant combinations, both natural and managed, that make full use…”
Get full text

Native species: a resource for the diversification of forestry production in the lowland humid tropics by Haggar, Jeremy P, Briscoe, C.Buford, Butterfield, Rebecca P

“…Reforestation of abandoned pastures in the lowland per humid tropics by farmers presents conditions distinct from those for which traditional plantation…”
Get full text

The effect of overstory composition on understory woody regeneration and species richness in 7-year-old plantations in Costa Rica by Powers, Jennifer Sarah, Haggar, Jeremy P, Fisher, Richard F

“…Regeneration under tropical plantations has been suggested as a route to facilitate the restoration of natural forests on degraded deforested lands in the…”
Get full text

Enhancing nutrient retention in tropical tree plantations: no short cuts by Bigelow, Seth W., Ewel, John J., Haggar, Jeremy P.

“…In the humid tropics large quantities of nutrients can be rapidly leached when the soil is unprotected by actively growing vegetation. We established…”
Get full text

Participatory design of agroforestry systems: Developing farmer participatory research methods in Mexico by Haggar, Jeremy, Ayala, Alejandro, Díaz, Blanca, Reyes, Carlos Uc

“…Participatory research that combines the knowledge of farmers and researchers promotes the development of a variety of agroforestry options that may meet the…”
Get full text

Sink or source-The potential of coffee agroforestry systems to sequester atmospheric CO sub(2) into soil organic carbon by Noponen, MRA, Healey, J R, Soto, G, Haggar, J P

“…Current carbon accounting methodologies often assume interactions between above-ground and belowground carbon, without considering effects of land management…”
Get full text

Effect on maize growth of the interaction between increased nitrogen availability and competition with trees in alley cropping by HAGGAR, J. P, BEER, J. W

Get full text

Phosphorus availability under alley cropping and mulched and unmulched sole cropping systems in Costa Rica by Haggar, J.P. (Cambridge Univ. (United Kingdom). Botany School), Warren, G.P, Beer, J.W, Kass, D

“…Phosphorus availability was measured in soils under five cropping systems: alley cropping with Erythrina poeppigiana, alley cropping with Gliricidia sepium,…”
Get full text

Alley cropping and mulching with Erythrina poeppigiana (Walp.) O. F. Cook and Gliricidia sepium (Jacq.) Walp.: effects on maize/weed competition by RIPPIN, M, HAGGAR, J. P, KASS, D, KÖPKE, U

Get full text

Rehabilitation--a challenge by Haggar, J

Get more information

The potential of plantations to foster woody regeneration within a deforested landscape in lowland Costa Rica by Haggar, Jeremy, Wightman, Kevyn, Fisher, Richard

“…Reforestation of degraded pastures in the Atlantic lowlands of Costa Rica since 1988 has created a patchwork of small plantations that may have the potential…”
Get full text

Performance and genetic variation of big-leaf mahogany ( Swietenia macrophylla King) in provenance and progeny trials in the Yucatan Peninsula of Mexico by Wightman, Kevyn E., Ward, Sheila E., Haggar, Jeremy P., Rodríguez Santiago, Bartolo, Cornelius, Jonathan P.

“…Stocks of the valuable big-leaf mahogany ( Swietenia macrophylla King) are declining, and trials for growth and pest resistance are needed to select material…”
Get full text

Alley cropping and mulching with Erythrina poeppigiana (Walp.) O.F. Cook and Gliricidia sepium (Jacq.) Walp.: effects on maize/weed competition by Rippin, M. (Bonn Univ. (Germany). Inst. of Organic Agriculture), Haggar, J.P, Kass, D, Koepke, U

Get full text

The Effect of Height of Water Table on the Growth of Holcus lanatus with Reference to Lolium perenne by Watt, Trudy A., Haggar, R. J.

“…(1) Plants of Holcus lanatus L. and Lolium perenne L. were grown in monocultures and in 50:50 mixture in free-draining conditions and with the water table at…”
Get full text

Flower Initiation in Kent Wild White Clover ( Trifolium repens L.), under Controlled Environmental Conditions by HAGGAR, R. J

Get full text

Agroforestry system effects on soil characteristics of the Sarapiquı́ region of Costa Rica by Tornquist, Carlos G, M. Hons, Frank, Feagley, Sam E, Haggar, Jeremmy

“…Agroforestry systems have been considered sustainable land-use alternatives for the humid tropics because they may imitate characteristics of natural…”
Get full text

Benefits and costs of intercropping reforestation in the Atlantic lowlands of Costa Rica by HAGGAR, Jeremy, RHEINGANS, Richard, ARROYO, Pablo, ALVARADO, Bolivar

“…Agroforestry options as a means of promoting reforestation were testedby establishing with 10 farmers simple comparisons between pure plantations andtimber…”
Get full text

Nursery and field establishment techniques to improve seedling growth of three Costa Rican hardwoods by Wightman, Kevyn Elizabeth, Shear, Ted, Goldfarb, Barry, Haggar, Jeremy

“…Seedlings of three economically important and ecologicallydifferent native hardwoods, Cordia alliodora (Boraginaceae),Hyeronima alchorneoides (Euphorbiaceae),…”
Get full text

Impact of Nitrogen and Organic Manures on Yield, Botanical Composition and Herbage Quality of Two Contrasting Grassland Field Margins by Jones, D., Haggar, R. J.

“…Grassland field margin strips, including hedge bottoms, may support a high diversity of wild flower and grass species. This diversity is threatened by…”
Get full text