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T. Kusuma Kumari , A. Sreenivasulu , Elusing Meru , P. S. Rao

Abstract

The field experiment on response to fertilizers on clones of Eucalyptus tereticornis in forest land of Tirupati , Andhra Pradesh , India revealed that interaction of N , P and K@60 kg of N/ha , 90 kg of P₂O₅/ha and 60 kg of K₂O/ha were most significant on growth parameters than individual effects of N , P and K.

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M. Babitha , P. S. Rao , Elusing Meru , A. Sreenivasulu

Abstract

An experiment was conducted on the effect of auxins on ischolar_maining stem cuttings of Givotia rottleriformis at Srinivasavanam Field Research Station, Tirupati. Three different hormones (IAA,IBA and NAA) were tried with 4 different concentrations (500,1000,3000 and 5000 ppm). Rooting was observed after 45 days in all the treated cuttings. IBA 3000 ppm treated cuttings showed highest ischolar_maining percentage (77.8) and it was at par with IBA 5000 ppm and differs significantly from others. IAA 500 ppm treated cuttings showed least ischolar_maining percentage (33.3). No ischolar_maining was observed in control.

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J. Bhagyalakshmi , P. Sujatha , A. Sreenivasulu , Elusing Meru , P. S. Rao

Abstract

Fertilisation of forest soils with chemical fertilisers is not only expensive but also results in environmental pollution. Therefore, it has become essential to go for a cheaper, natural, effective and environmentally safer resources such as biofertitisers. About 95-99% of soil phosphorus occurs in fohns that is not directly available to plant ischolar_mains. Further, its mobility in soils is very low. In such conditions mycorrhiza through symbiotic association offers an effective and long lasting remedy by solubilising unavailable phosphorus and converting them into available form, thereby acting as 'biofertilisers'. Pisolithus tinctorius is an ectomycorrhizal fungus living symbiotically with the ischolar_mains of Eucalyptus. Fruiting bodies of Pisolithus tinctorius were collected from different places and different strains were isolated. Axenic cultures were established on solid and liquid MMN media. From the axenic culture, mycobeads were prepared and applied to the Eucalyptus seedlings. Uninoculated seedlings were maintained as control under identical conditions to compare the growth the biomass. The fungal infected seedlings have better growth and ischolar_main development.

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M. Babitha , A. Sreenivasulu , Elusing Meru , P. S. Rao

Abstract

Stumps of different girth classes of Bhadrachalam clone-l of Eucalyptus tereticornis of the same age were selected and coppiced. The coppice shoots were collected four times, each at 15 days interval separately from each of the girth classes and counted. It was observed that with the increase in the girth of the coppiced stump, the number of shoots produced per stump increased significantly. However no significantly differences were observed between the harvests. Thus it can be concluded from this study that the ability to produce coppice shoots may, in some way be related to the size of the donor tree, which may be due to increased coppicing ability or due to greater carbohydrate reserves in stumps of greater girth.

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M. Babitha , A. Sreenivasulu , Elusing Meru , P. S. Rao

Abstract

An experiment was conducted at Srinivasavanam Field Research Station, Tirupati, India to find out whether the position of the rejuvenated shoot on the Eucalyptus stock plant exerted any influence on the ischolar_main and shoot growth of cuttings. The results revealed that the area of the largest leaf, percentage of sprouting buds, ischolar_main length, fresh weight and moisture content of ischolar_mains showed significantly higher values in respect of cuttings taken from coppice shoots of coppiced stump 7-13 cm above the ground. On the contrary, survival percentage, number of shoots, number ofleaves and number of ischolar_mains per cutting did not differ significantly among the treatments. Hence it is ideal to harvest the juvenile coppice shoots from 7-13 cm height on the coppiced stump to produce good quality clones.

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M. Babitha , A. Sreenivasulu , Elusing Meru , P. S. Rao

Abstract

The ischolar_maining response in fourteen indigenous clones of Gmelina arborea, under intermittent mist conditions was studied. Leafless cuttings of 1-15 cm diameter and 15-20 cm length were prepared with one of two nodes. The cuttings were treated with 0.1% bavistin for 10 minutes. The treated cuttings were given quick dip in ischolar_main initiating hormone, i.e., Indole 3-Butyric Acid at 1000ppm concentration in talc base. Clone 136 showed highest percentage of ischolar_maining (85), while clone No. 130 showed the least performance (40). Significant differences were observed in ischolar_maining response among the different clones.

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P. Srinivas ¹, A. Sreenivasulu ²

Affiliations
1 Deptt. of Civil Engg., RVR & JC College of Engineering, Chowdavaram-522 019, A.P., IN
2 Deptt. of Civil Engineering, K. L. College of Engineering, Vaddeswaram-522 502, A.P., IN

Abstract

Equilibrium conditions at shores of Chennai were upset when an artificial harbour was constructed in 1875, which was projected about 1 km into the sea. Because of this construction, there is heavy accretion on the southern side of the harbour resulting in Marina beach and severe erosion on the northern side. The study of north Chennai coastal area involves the collection of bathymetry of the area, and data on waves, tides, currents and winds. After analysing the data, suitable remedial measures like construction of sea wall, groynes and break water were examined. Out of all, the function of sea wall was observed to be the best remedial measure in controlling the erosion. The data on physical model study available at Institute of Hydraulic and Hydrology, Poondi were examined and a suitable remedy was designed.

Keywords

Coastal Protection, Coastal Erosion, Chennai Coastal Area, Erosion Protection.

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P. Srinivas ¹, A. Sreenivasulu ¹

Affiliations
1 Department of Civil Engineering, K L University, Vaddeswaram-522 502, Dist. Guntur, Andhra Pradesh, IN

Abstract

In the present situation, coal is an important raw material used for various industrial purposes. Generally, coal exists under the ground which can be extracted by removing the top soil. If the same coal exists below the river bed, the river has to be diverted in order to extract the coal. The primary survey was done in the area through which the Amb river water is being passed out. The levels were taken at regular intervals by using total station and the reduced levels were calculated. The volume of earth in cutting and filling were evaluated for forming a levelled river bed. The river plugs were designed to stop the flow of water before diverting the river flow into the designed river bed. The nallas which are the junction points were also designed which are provided along the river bed wherever the bed width changes.

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