Browsing by Author "Gangadhara Menon, P K"

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    Comparison of two methods for the study of permanent manurial trials
    (Kerala Agricultural University, 1982) Krishnan, S; Surendran, P U; Gangadhara Menon, P K
    A rigorous justification for the comparison of treatments by the stability approach initated by Finlay and Wilkinson (1963) has been attempted. The data on Jaya variety of rice were analysed both by the method of stability co-efficients as also by the method of analysis of groups of experiments. The results obtained by the above two methods revealed that they are equalent.
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    Morphological and Physico-chemical properties of the kayal soils of Kuttanad, Kerala State
    (Division of Agricultural Chemistry, College of Agriculture, Vellayani, 1975) Gangadhara Menon, P K; Aiyer, R S
    A study made on the morphological and physico-chemical characteristics of the kayal profiles of the Kuttanad region of Kerala revealed the following salient features. (1) These soils are classified under the order- ENTISOL, Sub order- Aquent and great group- Hydraquent according to the seventh Approximation. (2) Texturally they are classified mostly as silty loan or sandyclay loan, fine sand being the dominating fraction in all the profiles and layers. Only the surface soil of the Chithira kayal profile is clayey in texture with a maximum of 36.5 per cent clay. (3) The physical characteristics of the two profiles from the Rani kayal vary widely. While the profile 1 shows a decrease in clay content with increase in depth, the second profile shows a reverse trend for clay as well as fine sand. Fine sand is maximum in the middle layer of profile 1.