In vitro micropropagation of orchid, Oncidium sp. (Dancing Dolls)

A successful procedure was established for in vitro mass multiplication of orchid (Oncidium sp.). In vitro regeneration multiplication and rooting of plantlets were achieved from the immature seeds on Murashige and Skoog's medium supplemented with BAP (2.0 mg/l). Rooted plantlets were then transferred to perforated plastic pots and grown in the green house

Refinement of fertilizer recommendation based on Soil Test Crop Response technology for rice under System of Rice Intensification

A study on Soil Test Crop Response based Integrated Plant Nutrition System (STCR - IPNS) were conducted adopting an Inductive cum Targeted yield model in non-calcareous sandy loam soils of Lithic Haplusteptat Regional Research Station, Tamil Nadu Agricultural University, Paiyur, Tamil Nadu during Kharif 2013 in orderto develop fertilizer prescriptions equation (FPEs) through IPNS for the desired yield targets of rice under SRI technique. A ready reckoner of fertilizer doses at varying soil test value, for attaining 6 to 9 t ha-1 target grain yield of rice has been worked out. Using these equations a validation trial was conducted on Kharif 2014 at this station. The grain yield of rice ranged from 2.54 t ha-1 in absolute control to 8.65 t ha-1 in STCR-IPNS-9 t ha-1. The STCR-IPNS @ 8 t ha-1 was effective and economical as compare with any other treatments. The deviation recorded in the achievement of targets aimed was within the range of ± 10 per cent (90 – 110 %) proving the validity of the FPEs. The STCR treatments recorded relatively higher response ratio (RR) and benefit-cost ratio (BCR) over blanket and farmer's practice and STCR-IPNS treatments recorded relatively higher RR and BCR over STCR-NPK alone treatments. Post-harvest soil tests for NPK revealed that there was maintenance of soil fertility. The STCR-IPNS @ 8 t ha-1 was effective and economical as compare with any other treatments. Thus, the Inductive cum Targeted yield model used to develop fertilizer prescription equations provides a strong basis for soil fertility maintenance consistent with high productivity and efficient nutrient management for sustainable and enduring Agriculture

Albino of the marine cat fish, Tachysurus tenuispini(Day)

A specimen of the marine cat fish, Tachysurus tenuispinis exhibiting complete albinism caught in a trawl net operated at night at a depth of about 25 m was collected at the Malpe fish Ianding centre on 10-2-197

Length-weight relationship and condition factor of the Sciaenid fish, Johnieops osseus (Day)

Length-weight relationship of J. osseus indicated an allometric form of growth. Seasonal variations in the condition offish could not be attributed to any particular facto

Fishery and bionomics of sciaenids of South Kanara

Sciaenids, popularly known is jew fish, croakers or drums are one of the commercially important groups of marine fishes of India. They rank very high in abundance forming on an average, 7,04 % of the tora-f{.p1arine fish catch of the country (1974-76)

Reproductive biology of Sciaenid fish, Johnieops osseus (Day), from the South Kanara coast

Though some informalion is available regarding the breeding habits and early life histories of sciaenids'-s detailed studies on reproductive biology are lacking. The present paper deals with the reproductive biology of Johtlieops osseus, the dominant species of the sciaenids captured off South Kanara Coast

Ovary as an indicator of frequency of spawning in fishes

In majority of the marine fishes from tropical areas, maturation is a continuous process resulting in the occurrence of mature fishes throughout the year. In several Indian marine fishes, because of multiple spawning, a truly spent fish is scarcely found and also difficult to identify. Instead, partially spent fishes have been reported in a number of cases. As the eggs contained in the ovary are progressively ripened and shed, the ovary itself grows smaller, and to the naked eye, seems to reverse the stages by which it attained fuji maturity. The ovaries of such fi shes, though superficially resemble the normal stages III to V, differ from them in macroscopic appearance as well as microscopic structure to some extent. It occurred to the authors that such partially spent ovaries of fishes yield clues to the frequency or spawning in different species. In the present paper, the occurrence and nature of such ovaries and their relation to the frequency of spawning in two species of ribbon-fishes and a sciaenid have been discussed with supporting evidence from data on other fishes

3-Ethyl-4-methyl-1H-pyrazol-2-ium-5-olate

The title compound, C6H10N2O, is a zwitterionic pyrazole derivative. The crystal packing is predominantly governed by a three-center iminium–amine N+—H⋯O−⋯H—N inter­action, leading to an undulating sheet-like structure lying parallel to (100)

HYDROGEOCHEMICAL QUALITY OF GROUNDWATER IN PERUMAL LAKE, KURINJIPADI TALUK, CUDDALORE DISTRICT, TAMILNADU, INDIA

A study was carried out to determine the groundwater quality in parts of Perumal Lake, Kurinjipadi Taluk, Cuddalore district, Tamilnadu. Totally, 12 groundwater samples were collected at different parts of study area and 16 water samples from surface reservoirs (Perumal lake) and analyzed for physicochemical parameters (pH, EC, TDS, TH, Na, K, Ca, Mg and Cl, SO4 , HCO3- , NO3 ) in order to understand the hydro geochemistry of the water. The results of analysis were interpreted with geology and geomorphology of the area and also by various geochemical diagrams such as Piper trilinear plot and USSL classification diagram. Suitability of this water for its utility was verified using Indian standards. The result indicates irrespective of the seasons that only one well is suitable for drinking purpose, with remaining suitable for domestic and irrigation purpose. Further, from the results, it is pointed out that most of the well water falls in Na-Cl type indicating the influence of seawater in these wells which was confirmed by Piper plot. According to SAR (alkali hazard) and specific conductance (Salinity hazard) is plotted in USSL diagram, classification of water for irrigation purpose can be determined. Majority of groundwater samples fall in C3S1 zone indicating high salinity and low sodium hazard, satisfactory for plants having moderate salt tolerance on soils. In surface water most of the samples fall in C2S1 indicates medium salinity and low sodium hazard