B. N. Ganguli

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The problem which this paper seeks to tackle is; How to measare and quantify the pace ot development of Forestry sector in India.

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R. N. Kaul , B. N. Ganguli

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B. N. Ganguli , R. N. Kaul

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R. N. Kaul , B. N. Ganguli

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C. P. Bhimaya , R. N. Kaul , B. N. Ganguli

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The lopping of trees of various fodder apecies in different statei of India has been briefly reviewed. The details regarding the intensity of lopping practices have been discussed. Field experiments conducted on fully grown Prosopis spicigera trees at Beriganga and central research farm, Jodhpur during the years 1955-58 and 1960-61 respectively have shown that intensity of lopping does not adversely affect the growth of Prosopis spicigera trees. Recurrent lopping ot trees definitety reduces the leaf fodder yield, irrespective of intensity of lopping, perhaps due to successive reduction in the overall surface of new shoots, thereby suggesting a definite need for an intervening rest period for sustained forage yield. There is, therefore, a need for evolving a system of rotational lopping giving the trees just the right period of rest which may be necessary for a sustained leaf fodder yield.

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C. P. Bhimaya , R. N. Kaul , B. N. Ganguli , P. N. Bhatt

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On a rocky, refractory site adjoining the city high level water distribution tank covering an area of about 12.55 hectares (31 acres) an experimental afforestation work was undertaken in 1959. The site was practically devoid of soil and vegetation. Sprouted stumps of Prosopis juliflora were planted and seeds of Acacia senegal were sown in pits half filled with mixture of manure and transported soil from elsewhere. At the end of the first growing season with periodical watering, fairly good survival and growth in height of seedlings were observed. Closure resulted in the appearance and spread of annual and perennial grasses. The paper briefly describes the techniques of afforestation, results achieved therefrom, and the cost of plantation, as a guide for afforesting of such sites.

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B. N. Ganguli

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Preliminary results have shown that common dicot weeds occurring in the forest areas in the arid regions can be effectively controlled by butoxy ethanol ester of 2,4,5- T and 2, 4-D (Bladex-K) as well as mixture of 2, 4-D and 2,4,5-T (Spontox). For complete control as a foliar spray a higher concentration of both these arboricides is necessary. Painting after debarking at the collar region brings about complete eradication of Prosopis juliflora and Zizyphus nummularia and regeneration through ischolar_main suckers is also completely controlled.

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R. N. Kaul , B. N. Ganguli

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Seeds of 45 exotic Acacia species including different provenance of some of the species were tested for their seed characteristics and germination behaviour. The studies have revealed that most of the species have a prolonged germination periods, the average being 75 days. Germination per cent varied from 2 to 92 per cent. For the purposes of seed treatment, to hasten germination and reduce germination period, the species were grouped into 3 categories, namely, species of low, medium and high GEI/GC ratio. Of all the Acacia species, 39 species exhibited a medium and high GEI/GC ratio thereby indicating necessity of some pre-seed treatment to reduce their total germination period. The species were further grouped on the basis of the percentage of survival of seedlings in the nursery. Thirteen species were rated as 'hardy', 7 as 'medium' and 25 as 'poor'. Of these, the hardy ones are suitable for extensive field trials throughout the region, whereas species belonging to the other two ratings, should in the first instance be given trial in rainfall regions of 375 mm and above.

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B. N. Ganguli

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The application of Aerial Photogrammetric techniques in forestry is now an approved practice in almost all the advanced countries of the world. In the fields of forest type mapping, forest and range management and wild life censuses, the available aerial photographs of the project area furnish quick and valuable information which with the more conventional methods will take a much longer time with additional expenditure. The author, during his stay in U.S,A., attended a course on "Aerial Photogrammetry and Photo-Interpretation in Forestry" at the University of Arizona. The course involved classroom lectures on basic principles as well as preparation of a forest-type map of the Santa Catalina mountains near Tucson, Arizona, U.S.A. The present article is based on the information collected in the c1assroom as well as in the field. It discusses the techniques of delineating and transferring details of a forest area from aerial photographs to a controlled base map and calculation of areas of individual types for timber volume determination and other forest valuation purposes. Lastly, a greater use of aerial photographs in Indian Forestry and a suitable training programme in Indian Forest College, Dehra Dun, has been suggested.

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C. P. Bhimaya , M. B. Jain , R. N. kaul , B. N. Ganguli

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B. N. Ganguli

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Mexican conifers and pines in particular have proved to be valuable exotics in various countries of the World as a source of quick-growing and reasonably cheap soft-wood for pulp and paper industries. According to the available statistics in India, there is a great need for increasing the production of quick-grown pulpwood in our country in order to meet the rising demand which is expected to be ten times the present requirements in the next two decades. The dwindling resources of bamboo and the extreme difficulty in exploiting the land-locked coniferous woods of the higher Himalayas owing to logging and transport difficulties, coupled with the problem of their speedy regeneration after exploitation, have created an acute shortage of the vital long fibred material for the paper industry. Tropical and Mexican pines provide some solution to the problem of bridging the gap hetween demand and supply of pulpwood mainly because of their quick-growing nature, long fibre length, higher volume return and adaptability in suitable parts of other receptor countries. Thus, Mexican pines hold a great promise in India, the introduction of which has already been taken up by the Silviculture Branch, F.R.I., Dehra Dun, for some years past and the results of these trials indicate that a few species like Pinus patula, P. pseudostrobus, P. caribaea, P. oocarpa and some others hold bright prospects for growth in some of the areas tried (Qureshi, 1967). This paper briefly deals with the distribution, regeneration techniques, management and utilization of Mexican pines and at the end suggest a definite approach towards a systematic investigation based on elimination trials for rapid screening of species and promotion of large scale cultivation of the selected species for meeting the long felt needs of quick-growing long fibred material for the expanding pulp and paper industries in this country. The author visited Mexico under a UNESCO Study grant and the recommendations are based on actual field studies and discussions with various national and international experts on the subject.

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B. N. Ganguli

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no abstract

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B. N. Ganguli

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no abstract

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