2. Institutional Publications
Permanent URI for this communityhttp://localhost:4000/handle/123456789/96
Browse
4 results
Search Results
Item Mineralisation of nitrogen from non-edible oil cakes in medium black calcareous and lateritic soils(Kerala Agricultural University, 1988) Korah, P A; Shingte, A KAn investigation on the mineralisation of nitrogen from 6 non-edible oi| cakes, viz., neem, karanja, pilu, kusum, pisa and castor in two typical soils, viz., medium black calcareous and lateritic soils revealed that among the various cakes used, neem cake was the highest in , ; > release of ammoniacal nitrogen followed by karanja, castor, pilu, kusum and pisa respectively in the descending order in both the soils. Lateritic soil was found to be a batter arnmonifier than medium black calcareous soils. The rate of nitrification was highest in neem cake followed by castor, karanja, pilu, kusum and pisa cake respectively in the descending order, in both the soils. Medium black calcareous soil was found to be a better mtrifier than lateritic soil. The total mineralised nitrogen from all the cakes was higher in medium black calcareous soil than in the lateritic soils. In both the soils, neem cake was the highest in this respect followed by castor, karanja, pilu, kusum and pisa cake in the descending order.Item Inter-relationship between organic carbon, nitrogen, organic phosphorus and organic sulphur in two red loam soil series of South Kerala(Kerala Agricultural University, 1991) Korah, P A; Usha, P B; Sudharmai Devi, C RItem Distribution and forms of phosphorus in the kole soils(Kerala Agricultural University, 1991) Sheela, S; Koshy, M M; Korah, P AThe different forms of phosphorus, such as saloid-P, Al-P, Fe-P, reductant soluble-P, occluded-P, Ca-P and organic-P, as well as total-P were determined in the surface and subsur face soils collected from 15 locations in the kole land area of Kerala State. The mean values of the different fractions showed that organic-P was the largest fraction, followed in order by Fe-P, reductant soluble-P, Al-P, Ca-P, occluded-P and saloid P. The most abundant inorganic fraction was Fe-P which constituted 29.75% of the total P in the surface layers and 37.46% in the subsurface layers. Reductant soluble-P constituted 23.91% and 22.16% respectively of the total P in the surface and subsurface horizons. Occluded-P formed 1.81% of the total P in the surface soils and 1.50% of the total P in the subsurface soils. Of the total P, 4.15 and 7.09% respectively were found in the Ca-P form in the surface and subsruface layers. The Fe-P was significantly and positively correlated to the total sesquioxides and the Ca-P was significantly and positively correlated with total CaO.Item On the effect of non edible oilcakes on the respiratory activity of soil(Kerala Agricultural University, Vellanikara, 1968) Korah, P A; Shingte, A K