Browsing by Author "Jacob, C I"

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    Digital expression of soil fertility
    (Kerala Agricultural University, 1977) Nambiar, E P; Jacob, C I; Nair, T J
    Using the soil test data available in the various soil testing laboratories of Kerala State a new digital expression of soil fertility has been evolved for the formulation of more accurate fertilizer recommendations. This also facilitates easy preparation of soil test summaries and thus enable the preservation of large fund of analytical data, when available, in a concise and convenient manner.
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    Sulphur status of Kerala soils
    (Division of Agricultural Chemistry, Agricultural College and Research Institute, Vellayani, 1966) Jacob, C I; Subramoney, N
    A study was made of the forms and distribution of the sulphur in fourteen wet land and six dry land profiles. Relationship between different forms of sulphur and organic carbon was worked out. The main findings are as follows:- 1. Kerala soils in general are rich in total sulphur 2. Wet land soils contain more sulphur than dry land soils. 3. Total sulphur is significantly and positively correlated with organic carbon for all the three layers. 4. Maximum reserves of sulphur are found in the Kari soil of Kuttanad. 5. Excepting the Kari soils, in general the total sulphur decreases with an increase in the depth of the profile.