Browsing by Author "Nair, C K N"

Now showing 1 - 8 of 8

Investigations on the effect of foliar application of nitrogenous fertilizers on chewing tobacco (Nicotiana tabaccum Linn)
(Division of Agronomy, Agricultural College and Research Institute, Vellayani, 1963) Sukumaran, K M; Nair, C K N
Investigations on the possible relationship fields in Kerala State between the nutritional status of soils and the incidence of Bunchy top disease of Bananas (Musa species)
(Division of Agronomy, Agricultural College & Research Institute, Vellayani, 1963) Damodaran Nambiar, P K; Nair, C K N
Banana plays a very decisive role in the economy of the country. This is more so in the case of Kerala which commands the largest acreage under this crop. Such an economic crop is threatned with annihilation by the deadly disease "Bunchy Top" and the modest estimate of the annual loss is calculated to be about six crores of rupees.
Nutritional and fertiliser experiments on young and old rubber
(Kerala Agricultural University, Vellanikara, 1961) Nair, C K N
Nutritional status of soils and the incidence of "bunchy top" disease of banana (var. Java)
(Kerala Agricultural University, 1974) Balakrishna Pillai, P; Nair, C K N
All the plants in the control contracted the disease earlier than the treated plants. The uptake of N by the plant decreased with increasing levels of Ca & Ms There was an increase in the N content of leaves after the incidence of the dsease. The present studies have indicated that the CaO-)-MgO/K2O in the plant tissue exerts some influence on the resistance of the tissue to infection by the Bunchy top virus.
Nutritional status of soils and the incidence of bunchy top disease of bananas (Musa species) part V - effect of combined application of calcium and magnesium to soil on the ratio of calcium oxide/ magnesium oxide in the plant and its relation to bunchy top infection
(Division of Agronomy, Agricultural college and research institute, Vellayani, 1967) Vikaraman Nair, R; Nair, C K N
The experiment to study the effect of combination of calcium and magnesium application to soil on the calcium oxide/magnesium oxide ratio in the plant and on the bunchy topdisease of banaa, was laid out under semi-field conditions. Calcium oxide and magnesium oxide were applied in the ratios 3:1 and 6:1 at two levels of magnesium 0.05 and 0.10 per cent by weight of soil. Uniform levels of nitrogen, phosphorus and potassium in all treatments were given by application of equalquantities of fertilizers. No organic manure was added, to avoid too many uncertain factors which might have influenced the behaviour of calcium and magnesium in the soil and absorption by the plants. The concentration of the insect inoculum was maintained at a uniform level , by releasing infective sphids at the rate of 25 each . Inoculation was done four months after planting. To avoid natural infection before inoculation, periodical sprays of parathion 0.01 per cent had been given as a regular practice.
Nutritional status of soils and the incidence of the 'bunchy top' disease of bananas (Musa sp.): part IV- anatomical variations in virus infected and healthy plants as a function of calcium/magnesium ratio in soils
(Kerala Agricultural University, Vellanikara, 1966) Nair, C K N; Srinivasan, K; Sreekumari Amma
Nutritional status of soils and the incidence of the 'bunchy top' disease of bananas (Musa sp.):part III- Calcium oxide magnesium oxide ratio in plants a function of the soil contents of calcium and magnesium and its relationship to 'bunchy top' infection
(Kerala Agricultural University, Vellanikara, 1966) Nair, C K N; George, C K
Nutritional status of soils and the incidence of the bunchy top disease of banana (Var Java)- Part VI Effect of application of calcium and magnesium to soil on the ratio of Calcium oxide/Magnesium oxide in the plant and its relation to bunchy top infection
(Division of Agronomy, Agricultural College and Research Institute, Vellayani, 1968) Balakrishna Pillai, P; Nair, C K N
Experiments were laid out under semi-field conditions to study the effect of combined application of calcium oxide and magnesium oxide at different concentrations to soil in the ratio of 3:1. The absorption of calcium , magnesium, nitrogen, phosphorus and potassium by plants from soils containing varying quantities of calcium oxide and magnesium oxide was studied. The plants were allowed to be infected by releasing the virus carrying sphids after the initial period of growth, to study whether there was any resistance to the incidence of bunchy top.