Bajrang Singh , S. S. Raman

Abstract

Physical and chemical properties of three soil profile were studied under the Pinus patula plantations of eastern Himalayas. Interrelationships of these soil proflies have been discussed and compared to that of Western and Central Himalayas. It has been tried to find out that how leaching proceeds in the process of getting maturity of soil profiles as the forest becomes old. Attempts Were made to classify the soil type of this region. In short the soil is brown in colour with sandy loam texture which undergoes in the process of podsolizatlon. It is also called Inceptisol which shows little evidence of eluviation and illuviation. Organic matter decompose slowly due to the cool and humid climate. This results relatively higher (38.31) Carbon-nitrogen ratio. Effect or forest cover on soil properties shows that Pinus patula soils are poor in mineral concentrations.

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S. S. Raman

Abstract

Even-aged series of Shorea plantations are investigated for evaluation biological production. Leaf area index and stand basel area of have reached peak values over 18 years of tree growth. Tree biomass of 137 ton/ha and net primary productivity of 14.62 ton/ha/year are reported for sal plantations in Tilkonia range, Gorakhpur Forest Division. Effects of stand age on biomass production, distribution and production ratios are documented for man made forests of sal. Sal stands belonging to advanced ages (40-70 year) need further study to definitely establish trends of annual productivities in relation to age sequence.

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S. S. Raman

Abstract

Soil monolith method is found to be suitable for study of ischolar_main production and distribution for grassland species of Varanasi. Root development of forbs and grasses is explained for alhuvial soil conditions. Trend of ischolar_main production and its distribution in Dichanthium and Bolhriochloa subjected to biotic disturbance on alluvial plains of Varanasi is recorded. Wet and dry phases of the habitats are explained to be the factors responsible for ischolar_main extension and siratification among grassland spccics. Below ground production of 33840 kg/ha is found to be the maximum for Cynodon among the grasses.

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