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M. B. Sharma , C. L. Sharma

Abstract

The present study aims to examine the quantitative relationship between juvenile wood and mature wood densities in order to look for the possibility of predicting mature wood density from that of juvenile wood and vice-versa and also to find out the suitable stratum for the comparison of juvenile wood and mature wood densities in Cedrus deodara (Roxb.) Loud. It is observed that a positive and statistically highly significant correlation exist between mean of juvenile wood and mean of mature wood density in both whole ring and first-formed early wood. Also, the mean mature wood density is highly significantly correlated separately with each of the juvenile wood rings in both whole ring and first-formed early wood except ring 1 in case of whole ring. Thus, the mature wood density can be predicted at an early age from the wood density of juvenile wood rings by taking either whole-ring or first-formed early wood.

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C. L. Sharma , M. Sharma , T. Pao , K. Lego

Abstract

No abstract

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M. B. Sharma , C. L. Sharma

Abstract

Radial pattern of first-formed early wood tracheid length variation from pith to bark was studied with the main objectives of determining the effect of age, distance from pith, growth rate (distance/age) and ring width on first-formed early wood tracheid length among Deodar trees. There is rapid increase in tracheid length upto 10 years, afterwards the tracheid lengths either increases slowly or remains almost constant. It is positively and significantly correlated with independent variables like age, distance from pith and growth rate. The multiple correlation coefficients of these independent variables are also statistically significant.

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C. L. Sharma , M. Sharma , M. Jimmy Carter

Abstract

Mellanorrhoea usitata is one of the most important timber species of Manipur. The present study reports information about variations of wood properties from pith to periphery in this species. The study revealed a gradual increase in fiber length from pith to bark. The wood density gradually increased in heartwood from the pith but decreased towards the periphery in the sapwood. The effect of fiber length on wood density is found non-significant.

Keywords

Mmellanorrhoea usitata, Wood Properties, Fiber Length, Wood Density, Sapwood

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Bunty Shylla ¹, C. L. Sharma ¹

Affiliations
1 Krishi Vigyan Kendra, Dr. Y.S. Parmar University of Horticulture & Forestry Kandaghat, Solan - 173 215, Himachal Pradesh, IN

Abstract

Strawberry cultivation in Himachal Pradesh is mainly based on outdoor planting using hay as mulch and, very recently, using black polythene as mulch. The bulk of its production under field conditions usually occurs in April- May when market price is quite low. In an effort to make the crop remunerative through enhanced winter-production, a polyhouse experiment was set up to investigate influence of mulch colour on off-season fruiting response, fruit size and quality in strawberry (Fragaria x ananassa Duch.). Plants of cv. Chandler were planted in September, 2004. Irrigation was imposed using the given through T-Tape system, from 8.00 AM to 5.00 PM. Yellow plastic mulch significantly increased number of fruits, effected early and higher total yield compared to black or silver-over-purple plastic mulches. Un-mulched bed produced lowest yield and fruit quality. Yellow plastic mulch raised soil temperature by at least 2°C compared to the un-mulched bed.

Keywords

Strawberry, Polyhouse, Mulch Colour, Fruit Yield, Fruit Quality.

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