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End date: 1975 × Start date: 1975 ×
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    ThesisItemOpen Access
    Study on the effect of foliar application of urea and planofix on the growth, yield and quality of ginger varieties (Zingiber officinale Roscoe)
    (Department of Horticulture, College of Agriculture Bhubaneswar, 1975) Sreekandan, Nair; Das, R C
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    ThesisItemOpen Access
    Studies on the postnatal development of the epididymis in the Malabari goat (capra hircus)
    (Department of Anatomy, College of Veterinary and Animal Sciences, Mannuthy, 1975) Harshan, K R; KAU; Radhakrishnan, K
    The postnatal development of epididymis was described and illustrated from studies in 39 Malabari goats, divided into 13 groups, ranging from day old to 180 days of age. The weight of epididymis was positively correlated to age and body weight. The epididymal weight was more significantly correlated to body weight than to age. The left epididymis was found to be significantly heavier than the right. The length and thickness of the head, the body and the tail of the epididymis increased with increase in the weight of the organ. The tunica albuginea was found to be fibro- muscular in structure. The interstitial tissue was fibrous. The diameter of the epididymal duct and its lumen increased with increase in age. Both these measurements were highest in the cauda, less in the corpus and least in the caput. The process of pseudostratification of the epithelial lining of lumen of the duct was completed at first in the cauda, secondly in the corpus and finally in the caput. Regional differences in the height of epithelium was noticed, the highest being in the caput, lower in the corpus and lowest in the cauda. The epithelial height increased with advance in age. Sperms were observed at 165 days of age in the lumen of the epididymal duct. The concentration of sperm was maximum in the cauda, slightly less in the corpus and least in the caput. The lumen of the epididymis of the 150 days and 165 days old goats showed some spherical cells with spherical nuclei. These were considered to be spermatogenic cells coming from the testis.
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    ThesisItemOpen Access
    Comparative study on the feed utilisation of local and cross bred cows
    (Department of Animal Husbandary, College of Veterinary and Animal Sciences,Mannuthy, 1975) Chacko, C T; KAU; Subramanyam, M
    A comparison of the feed utilisation efficiency between Sindhi and Sindhi x Jersey cross bred lactating cows of the University livestock farm was made. Six cows each from the two groups were paired on the basis of the lactation number and stage of lactation. The animals were stall fed for 76 days including a pre – trial period of 15 days. The ration consisted of a concentrate feed and guinea grass to meet the protein requirement and paddy straw ad libitum. The following observations were recorded for individual cows: i) daily intake of different food ingredients; ii) daily milk yield ; iii) daily out put of dung; iv) body weight and body measurements during the pre – trial period, commencement, middle and close of the experiment; v) percentage of butter fat and total solids of individual composite samples tested once in a week; and vi) calculation of gross efficiency of feed utilisation. The following inference could be drawn: 1. The total dry matter consumption by the Sindhi and the cross bred cows were 3.30 kg and 3.61 kg per 100 kg body weight respectively and the dry matter consumption from roughage alone was 2.04 kg and 2.10 kg respectively. 2. The digestibility coefficients of dry matter, crude protein and nitrogen free extract were higher for the cross breds and in straight breds it was higher for crude fibre. For ether extract the digestibility coefficient was the same in both the groups. 3. The straight bred cows gained weight and increased in heart girth significantly (P < 0.01) during the experimental period, but no significant weight gain was recorded in cross breds. The increase in heart girth was significant (P < 0.05) among cross breds. The height at withers and body length did not increase significantly in the two groups. 4. The average daily 4% fat corrected milk yields were significantly higher (P < 0.01) in the cross breds. No significant difference was noticed between the two groups in the percentages of fat and total solids in milk. 5. The average gross efficiency of feed utilisation for milk production was 24.65 in cross breds and it was 18.62 in straight breds indicating that the cross breds were superior to the straight bred in the utilisation of feeds for milk production.
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    ThesisItemOpen Access
    Studies on intervarietal hybrids of tomato
    (Division of Agricultural Botany, College of Agriculture, Vellayani, 1975) Rema Bai, N; KAU; Mary K, George
    The present investigations were carried out in College of Agriculture, Vellayani during the year 1974-75. Five varieties of Lycopersion esculentum viz., YRFN-3, Mech9, VF36, Walter and Local were utilised for intercrossing. Investigations on the quantitative and qualitative characters, heterosis, hybrid sterility and sucrose content of the parents and hybrids were undertaken. Though the hybridisation work was done in all combinations, there was fruit setting only in fourteen crosses. YRFN-3 as male parent failed to cross with any other varieties except with Walter. In this case though fruit setting was occurred, seeds obtained were not viable. YRFN-3 as female parent also failed to cross with any other varieties except with Local.
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    ThesisItemOpen Access
    Studies on the effect of zinc in combination with lime on the growth, yield and absorption of nutrients by rice
    (Division of Agricultural Chemistry, College of Agriculture, Vellayani, 1975) Mariam, K A; KAU; Koshy, M M
    A pot culture experiment was carried out to assess the effect of different levels of zinc and lime on the growth, yield and chemical composition of rice, variety Annapurna. The soil used was collected from the kayal land attached to The College Farm, Vellayani. The levels of zinc and lime applied in the study were 0,10,20 and 40 kg/ha of zinc sulphate and 0, 250, 500 and 1000 kg/ha of 'Geolime' respectively. A randomised Block Design with 16 treatment combinations and 3 replications were used in the experiment.
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    ThesisItemOpen Access
    Studies on the effect of fungicides and silica in the control of sheath blight of rice caused by Corticium Sasakii (Shirai) Matsumoto
    (Division of Plant Pathology, College of Agriculture, Vellayani, 1975) Mathai, G; KAU; Paily, P V
    A field experiment to determine the effect of two fungicides under three levels of silica on the incidence and intensity of sheath blight of rice was conducted at the Agricultural College Farm, Vellayani during the crop season February to May 1974. The fungicides, hinosan and dithane M-45, were effective in reducing the intensity, per cent infection and rate of spread of the disease and thereby increasing the yield. Among the fungicides tried hinosan was significantly superior. Application of silica was found to have significant effect in reducing the intensity of the disease on the 75th day. However, the per cent infection, rate of spread and the intensity on the 85th day indicated that the effect of silica in imparting resistance to infection by the pathogen was not significant.
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    ThesisItemOpen Access
    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; KAU; 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.
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    ThesisItemOpen Access
    Studies on a manure supplement containing secondary and trace elements prepared from sea water (Sagar) on the growth, yield, quality and absorption of nutrients by rice
    (Division of Agricultural Chemistry, College of Agriculture, Vellayani, 1975) Chinnamma, N P; KAU; Money, N S
    A field experiment was conducted to assess the effect of application of Sagar, a manure supplement prepared from the sea water on the growth, yield and quality of rice and absorption of nutrients from soil. The result obtained are summarised below. 1) Application of NPK increased significantly all the growth characters and these characters were increased steadily with increase in the levels of NPK. Sagar application increased considerably the number of tillers and the number of productive tillers per plant.
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    ThesisItemOpen Access
    Investigations on nuclear polyhedrosis of black hairy caterpillar, Pericallia Ricini fabricius (Arctiidae: Lepidoptera)
    (Division of Entomology, College of Agriculture, Vellayani, 1975) Vasudevan Nair, K P; KAU; Abraham Jacob
    Detailed investigations were carried out on the nuclear polyhedrosis of the black hairy caterpillar,Pericallia ricini (Arotiidae) covering symptomatology, larval susceptibility, effect of the virus on the larval moulting, changes in the number of circulating haemocytes in the infected larvae, nature of causative agent, effect of temperature and sunlight on the infectivity of the virus and the cross infectivity of the virus to other species of lepidoptera. The virus infected larvae exhibited a ll the typical symptoms of nuclear polyhedrosis infection as reported from other lepidopterous larvae. The larvae infected in the early instars appeared paler and thinner. The infected larvae showed loss of appetite and became sluggish. The dead or dying larvae showed the characteristic symptom of hanging head downwards from the top o f the containers with the aid of prolegs. In the advanced stages of infection the cuticle became fragile and it ruptured liberating the liquefied body contents. The susceptibility of the larvae to virus infection decreased with increase in the age of the larvae. The averageincubation period varied from 5*24 days for the second instar to 8 days for the sixth instar larvae. The virus infection inhibited moulting in the later stages of the disease. No significant difference was observed in the THC of healthy larvae and virus infected larvae up to 24 hours after inoculation; there was significant reduction in the THC of diseased larvae after 24 hours of inoculation.