Browsing by Author "Antony, P C"
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Item Hydraulic conductivity and aggregate analysis of red and laterite soils of Kerala(Kerala Agricultural University, 1988) Antony, P C; Koshy, M MIn the study of the hydraulic conductivity and aggregate analysis of red and laterite soils of Kerala it was observed that the saturated hydraulic conductivities of both the soil groups were relatively very high. A trend of decrease in hydraulic conductivity was observed as the soil becomes finer in texture. The hydraulic conductivity of the undisturbed soils were found to be more than that of the disturbed samples even for the same bulk densities. The infiltration rates in both red and laterite soils were relatively high. The state of aggregation was excellent for both the soil groups studied. The soils contained more than 70% of the aggregates in the size range of diameter more than 0.25 mm. The stability index of the soils was also very high.Item Hydraulic conductivity of hydromorphic saline and acid saline soils under salinized and desalinized conditions(Kerala Agricultural University, 1989) Antony, P C; Koshy, M MItem Influence of sea water on hydraulic conductivity of two soil types of Kerala(Kerala Agricultural University, 1982) Antony, P C; Anil Kumar ShardaThe effect of the quality of sea water on the hydraulic conductivity of two soils of Kerala, namely, a lateritic and a red soil, was studied by conducting laboratory experiments on the undisturbed soil core samples. It was observed that the hydraulic conductivity decreased with increase in the salt content of the sea water used in both the soils. However, the effect was more pronounced in the case of lateritic soil as compared to red soil.Item Moisture retention characteristics and hydraulic conductivity of alluvial (Entisol) and brown hydromorphic (Alfisol) soils of Kerala(Kerala Agricultural University, 1985) Antony, P C; Koshy, M MThe maximum water holding capacity, field capacity, moisture retained at tensions of 1 , 5, 10 and 15 bar were highest in brown hydromorphic soils and those diminished in the order of riverine alluvium and coastal alluvium soils. Available water was highest in the brown hydromorphic soils followed by riverine alluvium and coastal alluvium. The saturated hydraulic conductivities of the soils were relatively high. The hydraulic conductivities of the undisturbed soils were found to be more than that of the disturbed samples even for the same bulk densities. Infiltration rates of all the soils were relatively high.Item The moisture retention characteristics and hydraulic conductivity of the forest loam (Mollisol and Alfisol) soils of Kerala(Kerala Agricultural University, 1985) Antony, P C; Koshy, M MItem Properties of red and laterite soils when submerged under saline waters of different concentrations(Kerala Agricultural University, 1988) Antony, P C; Koshy, M MItem Soil fertility variations as affected by basal and foliar application of urea to groundnut(Kerala Agricultural University, 1980) Antony, P C; Katre, R KA field experiment was conducted at the Agricultural College Farm, Indore to study the impact of basal and foliar application of urea to groundnut at the lime of flower initiation on plant composition and on the residual fertility of the soil for the subsequent rabi crops. The study has revealed that supply of 20 Kg N/ha alone and in combination with 2% urea spray, though not giving a significant increase in yield of groundnut, resulted in increased residual fertility of the soil on the rows than in between rows.