Loading...
Thesis
Browse
5 results
Search Results
ThesisItem Open Access PRODUCTIVITY AND REGENERATION STUDIES IN Acacia auriculiformis A. Cunn. ex Benth.(University of Agricultural Sciences, Dharwad, 2003) MURTHY, B. N. N.; DEVAR, K VEvaluation of growth, productivity and regeneration as influenced by age and site factors aimed at identifying optimum conditions of climatic, topographic and edaphic factors required to increase the growth, productivity and regeneration of Acacia auriculiformis. Four site conditions viz., Coastal Zone, Low Ghat, Up Ghat and Eastern Plain were evaluated for various growth and productivity parameters. The regeneration status of the species was also evaluated from the selected sites. The total volume was highest in Coastal Zone at 4 years (67.16m3/ha), Low Ghat at 6 years (146.75 m3/ha) and Eastern Plain both at 8 years (256.09 m3/ha) and 10 years (331.36 m3/ha). The soil properties at 4 and 6 years were found to be better under Coastal Zone and Eastern Plain at 8 and 10 years. The initial establishment of the species was superior in Coastal Zone under 4 years (1.30/4m2), 8 years (3.45/4m2) and 10 years (3.05/4m2) while the initial establishment at 6 years (1.70/4m2) was highest in Low Ghat plantations. The establishment status under Up Ghat and Eastern Plain plantations was extremely poor. The growth and productivity parameters were positive and significantly associated with climatic and edaphic factors in the initial 4 and 6 years while the growth and productivity parameters were positive and non-significantly correlated at 8 and 10 year old plantations. The regeneration of the species exhibited positive and significant association with climatic and edaphic factors.ThesisItem Open Access INFLUENCE OF Casuarina equisetifolia Linn. SHELTERBELT ON YIELDS OF GROUNDNUT AND FINGER MILLET(University of Agricultural Science, Dharwad, 2003) Doddabasawa; Shivanna, H"Shelterbelts primarily reduce the wind-velocity and bring changes in the microclimate, which are reflected in growth and development of leeward crop and thus in crop yield. Considering the multiple utility of shleterbelt on field crops the present study was carried out to know the effect of Casurina equisetifolia shelterbelt on the growth and yield of groundnut and finger millet. The growth parameters of groundnut and finger millet viz plant height, dry matter and leaf area per plant were significantly increased with increasing distance from shelterbelt. The increase was upto 80m (T4) and no significant increase was noticed there after and lowest was recorded in control. Groundnut and finger millet showed early response for initiation of flowering (2.70 and 2.30 days) and maturity (3.30 and 1.70 days) over control. The yield attributing characters of groundnut and finger millet were recorded highest in T4 and lowest was recorded in control. The pod and haulm yield of groundnut was increased with increase in distances from shelterbelt and was found highest at T4 (2006 and 3286 kg ha-1 1) followed by T5 (1968 and 3227 kg ha-1). Where as, lowest was recorded in control (1675 and 2908 kg ha-1). Grain and straw yield of finger millet was statistically differed in all the treatments over control and was found highest in T4 (2007 and 3124 Kg ha-1). The increase over control was to the tune of 17.5 and 14.5 per cent respectively. Soil moisture content in both the experimental plots was significantly increased with increase in distance from shelterbelt up to 80m and no significant increase was noticed there after. The soil temperature in both the fields was significantly differed in all the treatments over control. A gradual increase in soil temperature was registered with increase in distances from shelterbelt. The trend was similar at 30, 60 and 90 DAS respectively."ThesisItem Open Access TREE CROP INTERACTION STUDIES IN TEAK BASED AGROFORESTRY SYSTEM IN UPLAND PADDY AREA(University of Agricultural Sciences, Dharwad, 2003) Manjunatha, A; Madiwalar, S LABSTRACT NOT AVAILABLEThesisItem Open Access ECOLOGICAL ASSESSMENT OF BETTALANDS IN UTTARA KANNADA DISTRICT(UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, DHARWAD, 2003) Kyatappanavar, Sanjeev; Devar, K V"Ecological assessment of bettalands in Uttarkannada district is generally aimed at Identifying their present status with respect to vegetation components and management practices adopted in the bettalands. Three categories of bettaland holdings (small, medium and large) and one adjoining respective natural stand were evaluated among two vegetation tracts viz., moist deciduous and evergreen vegetation tracts. The species diversity v*'as found to be directly correlated with extent of land across different categories of holdings as such maximum number of species (53) were recorded in natural stands and least (22) in the small bettaland holding. Among various component species Terminalla tomentosa - Terminalia paniculata - Ougenia dalbergioides were found to be most dominant in moist deciduous tracts and Pterocarpus diverslfolium - Garcinia gummigatta - Olea dioca were abundant in evergreen tracts. Among various categories of land holdings, natural stands recorded highest number of tree species (690 trees./ha) followed by large land holdings (635 trees/ha) in evergreen tracts and least was with the small land holdings (225 trees/ha) in moist deciduous tract. The species richness and species diversity were highest in natural adjoining stands and large bettaland holdings and lowest in small bettaland holdings. The management practices such as frequency of lopping, utilization of fuel wood, collection of dried leaves and setting fire to the betttalands were found to be optimum in large and medium bettaland holdings, whereas it was severe in small bettaland holdings."ThesisItem Open Access ECOLOGICAL STUDIES ON VEGETATION CHARACTERISTICS OF GERSOPPA FOREST RANGE(UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, DHARWAD, 2003) Raghu, D; Devar, K V"Gersoppa range with varied topographic and edaphic conditions endowed diverse plant resources, gives it a status of high diversity hot spot. The study area composed of 191 plant species distributed over 58 families. Among the different altitudinal zones, considered in the study area, the third altitudinal zone (250-350 m MSL) was found to be richest in species composilion with 142 species followed by second altitudinal zone (150^250 m MSL) vyith 128 species, first (50-150 m MSL) and fourth (350-450 m MSL) altitudinal zones with 123 species each. The flora was dominated by Lauraceae, Rubiaceae, Euphorljiaceao, Fabaceae, Ebenaceae, Myrtaceae and Rutaceae members. The lower altitudinal zone was dominated by Knema attenuata - Vitex altissima - Hopea ponga lypo of formation. The second altitudinal zone was dominated by Knema attenuala - Olea dioica - Polyalthia fragrans type of formation. The third altitudinal zone was dominated by Knema attenuata - Syzygium gardneri - Hopea ponga type of formation. The fourth altitudinal zone was dominated by Syzygium gardneri ~ Knema attenuata - Dimocarpus longana type of formation. All the altitudinal zones exhibited close relation with each other encompassing more than 64% of common species. The Shannon's tree species diversity (H') in the study area ranged from 3.645 to 3.877 indicating relatively high species diversity. The tree density in the study area varied from 280 trees/ha to 410 trees/ha. The tree basal area in the study area ranged from 15.23 m'Vha to 26.42m'7ha. The important and dominant species recorded in (he saplings and poles strata vjere Calamus thwaitesii, Hopea ponga, Aporosa lindleyana, etc. The IVI value results reflected Hopea ponga, Knema atlcnuata and Aglaia extipulata, Dimocarpus longana, etc., as the most dominantly regenerating species. The tree basal area, free density, species richness and diversity exhibited positive correlation with altitude and nitrogen, phosphorus, potassium, organic carbon content of soil while negative correlation with slope gradient."