V. M. Srinivasan , Jon Caulfield

Abstract

The agro-forestry system is an ideal land-management system for unproductive and degraded land. It also proves efficacious for soil conservation. Where protection is the primary objective, alley-cropping may serve as the prime candidate. For extensive areas subject to wind erosion !ooheIter belts are an obvious cboice. For orcbards and crops susceptible to wind damage wind-breaks offer good protection. A multi-tier system gives year-round yields of one or the other produce In addition to tbe above benefits, agro-forestry system indirectly helps in building up tbe soil fertility, improving tbe microclimate, conserving tbe soil and water and improving the socio-economic condition of tbe farmer wbo practices it. Hence it is a versatile land management system for sustained yield.

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S. Krishnaswami , V. M. Srinivasan , R. S. Vinaya Rai

Abstract

Studies were carried out at the Forestry Research Station. Mettupalayam to assess the variation in growth components at 6 and 12 months after planting and growth increment in progenies of eight plus trees of E. tereticornis of Arakku Valley, Andhra Pradesh. Saplings of hulked seed served as control. The genetic parameters of growth components in relation to age were also determinted. Though no progeny proved superior to the bulk population in respect of any of the growth attribute investigated, in terms of diameter increment, Those of T₄ T₆ and T₇ scored over others. Heritability of plant height and base diameter did not vary with age. Base diameter was characterised by high heritabllity and low GA suggesting the high heritability to be due to non-additive genes.

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S. Krishnaswami , V. M. Srinivasan , R. S. Yinaya Raj

Abstract

The association, if any, of capsule weight on seedling vigour was studied in EucalyptuIs ereticornis. Capsules were graded on the basis of their 100 capsule fresh weight into five ategories viz. 10, 15, 20, 25 and 30 g and their seeds sown in a replicated randomised trial. Neither germination percentage nor seedling attributes like shoot length, ischolar_main length or eedling dry weight varied due to capsule weight.

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