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The effect of a saline nutritional regime on tomato (Lycopersicon esculentum Mill.) fruit yield and fruit quality enhancement for five cultivars (CLN 425, Pearson, Napoli, Hymar, and Sierra) was studied. The saline nutrient treatments consisted of (i) Hoahland's solution (EC=2.5 mScm-1), (ii) Hoagland's solution + 50 mM NaC1 (EC=7.46 mScm-1), (iii) Hoagland's solution + 50 mM NaC1 + 4 mM K2SO4 ...

SUBJECT: cloruro sodico; agua de riego; salinity; lycopersicon esculentum; variete

POSTED TO: Agricultural Sciemces [1026-0544]

The Entisols, Inceptisols and Aridisols which dominate the soils of Oman are the drive to agricultural development in the Sultanate. This paper reviews briefly the classification and pedological characteristics of these soils, their land suitability assessment, and recent fertilizer research. Water is absolutely essential for the growth of plants and the contribution of irrigation practice to ...

SUBJECT: ammoniac; soil types; ammonia; saline soils; amoniaco

POSTED TO: Agricultural Sciences [1026-0544]

The von Bertalanffy growth parameters estimated based on the 1990/91 carapace length data of Penaeus indicus from the Gulf of Masirah, Oman were used to calculate total mortality, yield-per-recruit (i.e., average weight of a shrimp from a cohort under a given fishing pattern) and relative mean biomass (i.e., exploited cohort biomass over un-exploited cohort biomass) for the population sampled. ...

SUBJECT: biomasse; crevette; biomass; prawns and shrimps; biomasa

POSTED TO: Agricultural Sciences [1026-0544]

Macroporous K-carrageenan beads were prepared by two-step emulsion method, chemically cross-linked, characterized, and then employed for gel filtration. It has recently been recognized that convection (i.e. bulk fluid movement) through large pores (i.e. macropores) is an effective way of enhancing the performance of chromatographic separation by improving mass transfer. The aim of our study wa ...

SUBJECT: enzyme; cromatografia; carrageninas; cells; carrageenans

POSTED TO: Agricultural Sciences [1026-0544]

Little is known of the ecological role of only species of mangrove, Avicennia marina, in Oman. This study provides information on the physical habitat of three mangrove areas (Qurm, Mahout and Shinas) in relation to the main features of each area (i.e., community structure, soil and water analyses and biota). the climate of the three mangrove areas and surrounding regions is hot and arid: all ...

SUBJECT: paletuvier; mangles; avicennia; madera de construccion; bois de charpente

POSTED TO: Agricultural Research (Oman) [1026-0544]

Irrigation and hydraulic engineers are often faced with the difficulty of tedious trial solutions of the manning equation to determine the various geometric elements of open channels. This paper addresses the development of a computer model for the design of the most commonly used channel-sections. The developed model is intended as an educational tool. It may be applied to the hydraulic desig ...

SUBJECT: application des ordinateurs; aplicaciones del ordenador; reseau de drainage; canales; ouvrage hydraulique

POSTED TO: Agricultural Sciences (Oman) [1026-0544]

The Arabian abalone occurs in the Arabian Sea's rocky coastal zone in association with conspicuous macroalgal communities in which it represents the dominant herbivorous component. Despite such ecological importance and although the commercial exploitation of abalone presents a considerable contribution to Omani fisheries, almost nothing is known about the biology of this species. This report ...

SUBJECT: mar arabigo; biologia pesquera; mer d'arabie; haliotis; algae

POSTED TO: Agricultural Sciences (Oman) [1026-0544]

SUBJECT: woodlands; semiarid zones; prosopis cineraria; foret claire; amenagement forestier

Gallic acid and methyl ester of gallic acid have been identified as antifungal compounds against the mycelial growth of Pythium aphanidermatum from acetone-water extracts of Acacia nilotica leaves. The growth of fungus was completely ceased by gallic acid and its methyl ester at 1000 ppm and 750 ppm, respectively. Antifungal properties of both compounds were found to be higher in combination t ...

SUBJECT: fonte de semis; feuille; acacia nilotica; control de plagas; hojas

POSTED TO: Agricultural Sciences (Oman) [1026-0544]

Field experiments were conducted on tomato crops over a two year period to evaluate the efficacy of six insecticides, viz. triazophos, phosphamidon, dimethoate, buprofezin, and Aflix (endosulfan + dimethoate) each at 0.05 and Repelin (plant product insecticide) at 1 concentration along with a cultural treatment by covering the plants with Agril (a polyester material) for the control of whitefl ...

SUBJECT: dimethoate; phosphamidon; lycopersicon esculentum; insecticide; dimetoato

POSTED TO: Agricultural Sciences (Oman) [1026-0544]