Journal of Agriculture- University of Puerto Rico Impact Factor & Information
Current impact factor: 0.00
Impact Factor Rankings
|2015 Impact Factor ||Available summer 2015 |
|2011 Impact Factor ||0 |
|2010 Impact Factor ||0.023 |
|2009 Impact Factor ||0.077 |
|2008 Impact Factor ||0.204 |
|2007 Impact Factor ||0.037 |
|2006 Impact Factor ||0.047 |
|2005 Impact Factor ||0.028 |
|2004 Impact Factor ||0.116 |
|2003 Impact Factor ||0.156 |
|2002 Impact Factor ||0.044 |
|2001 Impact Factor ||0.083 |
|2000 Impact Factor ||0.041 |
|1999 Impact Factor ||0.089 |
|1998 Impact Factor ||0.085 |
|1997 Impact Factor ||0.04 |
|1996 Impact Factor ||0.098 |
|1995 Impact Factor ||0.04 |
|1994 Impact Factor ||0.022 |
|1993 Impact Factor ||0.011 |
|1992 Impact Factor ||0.047 |
Impact factor over time
|5-year impact ||0.07 |
|Cited half-life ||0.00 |
|Immediacy index ||0.00 |
|Eigenfactor ||0.00 |
|Article influence ||0.03 |
|Other titles ||The Journal of agriculture of the University of Puerto Rico, Journal of agriculture of University of Puerto Rico |
|ISSN ||0041-994X |
|OCLC ||2449950 |
|Material type ||Government publication, Periodical, State or province government publication |
|Document type ||Journal / Magazine / Newspaper |
Publications in this journal
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ABSTRACT: Soils are being degraded around the world as a consequence of climate change, intensive cropping and inappropriate land management. These actions cause soil erosion and topsoil depletion. Eroded and bare soil is exposed to environmental pressures, which can increase its organic matter loss via CO2 release. The use of compost provides organic matter that can associate with clays acting as a cementing agent forming soil aggregates and preserving good chemical and physical soil qualities that can avoid soil degradation. The quality of soils is reduced as soil organic carbon decreases leading to decreasing crop yields. Depletion of soil organic matter impairs soil physical, chemical and biological properties. Organic matter buffers soil pH in some tropical soils. Organic matter has a buffering capacity. Acid soils tend to increase its pH, while alkaline soils tend to decrease it. The buffering effect is greater when the organic matter has a high concentration of humic acids. Soil exposure to environmental pressures can render nutrient deprived soils. When soils are weatherized hydrogen ions replace the exchangeable cations, Ca, Mg, K, Na, in its CEC hence decreasing the pH of the soil. Lower pH may increase the soils capacity to fix P into an unavailable form and cause aluminum toxicity, along changing physical qualities such as increasing low porosity and bulk density. A 2% SOC has been suggested as minimum level for proper soil-environmental and -agronomic conditions. At 0 to 30-cm depth, some Puerto Rican soils have less than 7.2 kg C/m2, equivalent to 2% SOC when soil bulk density is 1.2 Mg/ha. The reduction of soil organic matter could impede agricultural activity.
Journal of Agriculture- University of Puerto Rico 12/2013; 97(1).
Journal of Agriculture- University of Puerto Rico 12/2013; 92(3-4):117-132.
Journal of Agriculture- University of Puerto Rico 01/2013; 97(3-4):107-117.
Journal of Agriculture- University of Puerto Rico 01/2011; 95:57-78.
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ABSTRACT: A sooty mold disease on longan (Dimocarpus longan L.) was found on trees growing close to bodies of water in Puerto Rico. On the basis of the morphological characters the fungi associated with this disease were identified as Tripospermum porosporiferum Matsushima and T. variabile Matsushima. T. porosporiferum produced hyaline to pale brown tri or tetraradiate conidia. Conidia (40 x 6.6 µm) have four septate appendages, with a shorter two-celled axis 16 µm long. Conidia are constricted at septa. T. variabile produced pale brown, triradiate (T-shape) conidia (36 x 6.6 µm) with main axis not bent back. Conidia are constricted at septa and the shorter part of axis which is 6.39 µm long. Both organisms have been reported in Puerto Rico in decaying vegetation in bodies of water. Studies will be initiated to assess the impact of these fungi on production of trees cultivated near bodies of water where these fungi are most commonly found
Journal of Agriculture- University of Puerto Rico 01/2010; 94(2-4):285-287.
Journal of Agriculture- University of Puerto Rico 01/2008; 92:235-239.
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.