Loading...
Kerala Agricultural University, Thrissur
The history of agricultural education in Kerala can be traced back to the year 1896 when a scheme was evolved in the erstwhile Travancore State to train a few young men in scientific agriculture at the Demonstration Farm, Karamana, Thiruvananthapuram, presently, the Cropping Systems Research Centre under Kerala Agricultural University. Agriculture was introduced as an optional subject in the middle school classes in the State in 1922 when an Agricultural Middle School was started at Aluva, Ernakulam District. The popularity and usefulness of this school led to the starting of similar institutions at Kottarakkara and Konni in 1928 and 1931 respectively.
Agriculture was later introduced as an optional subject for Intermediate Course in 1953. In 1955, the erstwhile Government of Travancore-Cochin started the Agricultural College and Research Institute at Vellayani, Thiruvananthapuram and the College of Veterinary and Animal Sciences at Mannuthy, Thrissur for imparting higher education in agricultural and veterinary sciences, respectively. These institutions were brought under the direct administrative control of the Department of Agriculture and the Department of Animal Husbandry, respectively. With the formation of Kerala State in 1956, these two colleges were affiliated to the University of Kerala. The post-graduate programmes leading to M.Sc. (Ag), M.V.Sc. and Ph.D. degrees were started in 1961, 1962 and 1965 respectively.
On the recommendation of the Second National Education Commission (1964-66) headed by Dr. D.S. Kothari, the then Chairman of the University Grants Commission, one Agricultural University in each State was established. The State Agricultural Universities (SAUs) were established in India as an integral part of the National Agricultural Research System to give the much needed impetus to Agriculture Education and Research in the Country. As a result the Kerala Agricultural University (KAU) was established on 24th February 1971 by virtue of the Act 33 of 1971 and started functioning on 1st February 1972. The Kerala Agricultural University is the 15th in the series of the SAUs.
In accordance with the provisions of KAU Act of 1971, the Agricultural College and Research Institute at Vellayani, and the College of Veterinary and Animal Sciences, Mannuthy, were brought under the Kerala Agricultural University. In addition, twenty one agricultural and animal husbandry research stations were also transferred to the KAU for taking up research and extension programmes on various crops, animals, birds, etc.
During 2011, Kerala Agricultural University was trifurcated into Kerala Veterinary and Animal Sciences University (KVASU), Kerala University of Fisheries and Ocean Studies (KUFOS) and Kerala Agricultural University (KAU).
Now the University has seven colleges (four Agriculture, one Agricultural Engineering, one Forestry, one Co-operation Banking & Management), six RARSs, seven KVKs, 15 Research Stations and 16 Research and Extension Units under the faculties of Agriculture, Agricultural Engineering and Forestry. In addition, one Academy on Climate Change Adaptation and one Institute of Agricultural Technology offering M.Sc. (Integrated) Climate Change Adaptation and Diploma in Agricultural Sciences respectively are also functioning in Kerala Agricultural University.
Browse
4 results
Search Results
ThesisItem Open Access Value chain analysis of black pepper in Kerala(Department of Rural Marketing Management, College of Co-operation Banking and Management, Vellanikkara, 2020) Hena, M; KAU; Ushadevi, K NAgriculture value chain analysis is an inclusive analysis to assist farmer-producers of less developed and developing countries to stimulate economic growth of poor and it is a way for poverty reduction and social development. Further, it analyses the necessity of farmer integration, agriculture viability, and collaboration across chain actors and importance of rural advisory and support services to farmers, especially in case of market information and innovative production and processing techniques. It gives equal importance to strengthen the value chain relationship between farmer-producers and other actors in the chain through mutual benefit and cooperation. Black pepper is mostly cultivated as an inter crop in the homestead gardens in Kerala. At present, Kerala has 85,141 ha of total area under black pepper cultivation with a total production of 37,995 MT, in which Idukki and Wayanad districts together contributes 74 percent of the total black pepper production in Kerala from 65 percent of the total area under black pepper cultivation (GoK, 2019). The research work entitled “Value chain analysis of black pepper in Kerala” was undertaken to map the value chain of black pepper in Kerala, to examine the governance influence on value chain actors, to evaluate the producer farmer’s linkages with other value chain actors, to analyse the opportunities and constraints faced by value chain actors and to suggest appropriate strategies to upgrade the performance of value chain actors of black pepper. The study area was confined to Idukki and Wayanad districts of Kerala, since these districts accounted for the first and second position under the area under cultivation of black pepper in Kerala. The sample respondents were selected from Vandiperiyar panchayath of Azhutha block and Rajakumari panchayat of Nedumkandam block in Idukki district and Mullenkolly panchayath of Panamaram block and Vellamunda panchayat of Mananthavady block in Wayanad district. Thirty black pepper farmers were selected from each panchayat at random and thus a total of 120 farmers were selected for the study. The other value chain actors were identified using snowball technique and the size of the sample was limited to a maximum of one hundred actors, including nurseries (6) input suppliers (7), hill produce dealers (38), wholesalers (32), retailers (6), exporters (3), marketing cooperative societies (2), registered companies (2) and IPSTA Brokers (4). Expert interviews were carried out with Officials in Spices Board, Agriculture Officers in Krishi bhavan, Principal Agriculture Officer (District level), and NGOs. The data analysis was done by using Value chain mapping tool (global approach), percentage analysis, index method, modified market efficiency (Acharya’s approach) and Kruskal Wallis test. After conducting the value chain mapping of black pepper in Kerala, the results revealed that the major core processes included in the value chain were input supply, production, procurement or collection, wholesaling, processing, exporting and retailing. The main actors who actively participated in the value chain were input suppliers, black pepper farmers (organic farmers and conventional farmers), hill produce dealers, wholesalers, marketing cooperatives, exporters (under NGOs), commission agent, farmer producer company, retailers and IPSTA brokers. The identified collectors of black pepper farmers were hill produce dealers, exporters (under NGOs), marketing cooperatives, farmer producer company and other registered companies. From the hill produce dealers the black pepper was transferred to wholesalers, and the exporters (under NGOs) carried out the major value addition activities to convert the black pepper and fresh raw pepper to quality black pepper, white pepper and green pepper. The total establishment cost per acre incurred by the conventional black pepper farmers in Idukki district and Wayanad districts were ₹1,00,950 and ₹1,02,870 respectively. In Idukki district, the establishment cost incurred by the black pepper farmers in first, second and third year were ₹ 43,650, ₹ 29,600 and ₹27,700 respectively, whereas in Wayanad district it was ₹43,775, ₹29,350 and ₹29,745 respectively. The major inputs required for the maintenance of organic black pepper was human labour, farm yard manure, organic manure, organic plant protection materials and harvesting bags. The total annual maintenance cost per acre incurred by organic black pepper farmers in Idukki and Wayanad district was ₹80,540.38 and ₹76,822.07 respectively. The major inputs required for the maintenance of inorganic black pepper in one acre was human labour, farm yard manure, organic manure, fertilizers, plant protection chemicals and harvesting bags. The annual maintenance cost of inorganic black pepper per acre was computed as ₹73,047.06 for Idukki district and ₹72,767.10 for Wayanad district. Thus, the total cost of production of organic black pepper was arrived at ₹ 344.50 per kg in Idukki district with a comparatively less cost of ₹337.00 per kg in Wayanad district. However, the total cost of production per kilogram of inorganic black pepper was worked out as lower than the cost of production or organic black pepper in both districts. The cost of production of inorganic black pepper in Idukki district was ₹311.00 per kg and in Wayanad district it was ₹309.00 per kg. Five marketing channels were found in the value chain of the three selected products in the study: black pepper, white pepper and green pepper. The identified marketing channels are: 1) Marketing Channel I (MC-I) Farmers Exporters (Organic) 2) Marketing Channel II (MC-II) Farmers Marketing Cooperatives Buyers in Kochi (Inorganic) 3) Marketing Channel III (MC-III) Farmers Farmer Producer Company Commission Agent Buyers in Kochi (Inorganic) 4) Marketing Channel IV (MC-IV) Farmers Hill Produce Dealers Wholesalers Buyers in Kochi (Inorganic) 5) Marketing Channel V (MC-V) Farmers Hill Produce Dealers Retailers (Inorganic) In both districts, the marketing cost incurred by the exporters in the production of value added organic products were very high compared to the marketing cost incurred by the other channel members in the marketing of inorganic black pepper. It was exposed that in both districts, the black pepper farmer has got the highest price in the marketing channel with shortest length, i.e. farmer to exporter. In Idukki district, the farmers who are supplying black pepper to exporters were registered organic certified farmers and the organic black pepper fetch ₹378.50 per kilogram. The total marketing margin of Channel I was ₹131.50kg for black pepper, ₹395.00 per kg (highest margin) for white pepper and ₹251.50 per kg for green pepper. While in Channel V, the retailer (exclusive spice outlets) captured the highest margin of ₹379.41 per kilogram of black pepper and the lowest margin was obtained by Channel II (₹32.21 per kg). Among the different marketing channels in Wayanad districts, the farmers got highest price (₹370.70 per kg) in the marketing channel of organic black pepper. The total marketing margin computed for each product in Channel I was ₹139.30 per kg of black pepper, ₹417.80 per kg of white pepper and ₹278.30 per kg of green pepper. In the marketing channel of inorganic black pepper, the highest marketing margin was obtained by Channel V (₹342.00 per kg of black pepper) and the lowest marketing margin was obtained by Channel III (₹44.25 per kg of black pepper). An examination over the value chain governance in the black pepper value chain exposed that the price of the black pepper remains a significant factor that decides the “market type” governance structure of the value chain. Hence, the conventional farmers in the value chain and their chain actors fell under the market type governance structure. “Modular” type of governance structure was identified between the farmers and the NGOs, the farmers supplied the required product to the NGOs where the technology and knowledge has transferred from the NGOs to the farmers and encouraged farmers to undertake additional investment in agriculture. “Relational” type of governance structure was observed between the registered companies where the interaction between farmer and buyer were complex, but the mutual dependence existed between them were prominent and the firm collected the desired quality product from the farmers. The analysis on linkages in value chain exhibited that there exist cent percent linkage between farmers and fellow farmers, farmers and hill produce dealers, farmers and commercial banks, farmers and krishi bhavan and farmers and local administration. Three factors were identified to obtain the level of formality in the linkages like, informal, verbal arrangement and formal written contract. Business linkages or relationships can be formal or informal, accordingly, the formality in linkages between farmers and other actors in the value chain has identified. Trust and linkages are interconnected within a value chain, and linkages creates trust in the relationships. Hence, it is exposed that the formality and trust existed in the linkages is on the basis of the type of business relationship between the actors. Black pepper value chain is predominantly a buyer driven value chain, therefore the black pepper farmers had less price negotiation power. Furthermore, the farmers were exposed to different type of constraints in various activities included in the value chain, like pre-production constraints, production constraints, marketing constraints and other associated constraints. The low price of black pepper, price fluctuations of black pepper in the market, low quality of black pepper, import of black pepper from other countries were reported as the severe constraints by the majority of the actors involved in the black pepper value chain. Producing the value added products of black pepper, to improve the quality of black pepper and direct selling of black pepper to processors or exporters were the major opportunities identified by farmers. There is an opportunity for the conventional farmers to shift to organic farming practices and to become a certified organic farmer after three years, but the result revealed that conventional farmers were not interested to shift to organic farming. Because most of the conventional farmers cultivates cardamom in their farms, and according to them organic cultivation of cardamom and some other crops will not be viable and practical. The strategies identified to upgrade the performance of value chain actors includes: 1) to increase the productivity of black pepper, 2) need for farmer producer organizations for value addition, 3) upgrading of products and processes in the value chain 4) need to change government policies and if, the import of black pepper cannot be stopped, strict action should be taken to avoid the commingling of imported black pepper with the black pepper produced in Kerala in different nodes of value chain, which ultimately degrade the value of black pepper in the Kochi market. To conclude, the competitiveness of Kerala’s black pepper in the international market is diminishing day by day, as the price of black pepper is showing a decreasing trend from 2017 in the country. To get a reasonable income for the farmers from the black pepper cultivation they have to go for value addition activities. While in the current circumstances, a single farmer cannot undertake the production of value added products like white pepper and green pepper. Hence, the farmers has to group together to carry out these activities in the black pepper value chain in Kerala to capitalize the opportunities ahead, by taking into consideration of the actual constraints faced by them. Side by side, the institutional support machineries for enhancing the agriculture production in the state should focus on the farmer producer organizations like marketing cooperatives or farmer producer companies, so that a share of the noticeable profit grabbing by the actors, who undertakes value addition of black pepper and its value added products like white pepper and green pepper in the value chain can be transferred to the black pepper farmers.ThesisItem Open Access Genetic cataloguing of hot chilli (Capsicum chinese JacQ.)(Department of Olericulture, College of Agriculture,Vellayani, 2001) Manju, P R; KAU; Sreelatha Kumary, IThe research project "Genetic cataloguing of hot chilli (Capsicum chinense Jacq.)" was carried out in the vegetable research plot of the Department of Olericulture, College of Agriculture, Vellayani, during September 2000 to May 2001. The objective of the study was to catalogue the accessions based on the IBPGR descriptor for Capsicum and to estimate the genetic parameters for different traits in the germplasm for identifying superior lines based on yield, quality and pest and disease resistance. Thirty two accessions of C. ch inense collected from various sources upon cataloguing pointed out wide variation for several morphological characters. Analysis of variance revealed significant difference among the accessrons for all the characters studied namely, plant height, primary branches per plant, plant spread, days to first flowering, pollen viability, days to maturity, fruits per plant, fruit length, pedicel length, fruit girth, fruit weight, seeds per fruit, 1000-seed weight, yield per plant, yield per harvest, number of harvests, capsaicin, oleoresin, ascorbic acid and mosaic incidence. Among the accessions, CC 23 recorded the maximum yield (1649.72 g) as well as fruits per plant (637.44). CC 13 was the earliest to flower (54.67 days) with the maximum number of harvests (6.94) and least vulnerability index for mosaic (40.63). Fruits per plant recorded the maximum phenotypic and genotypic coefficients of variation, followed by yield per plant and fruit weight. High heritability coupled with high genetic advance was observed for fruits per plant, yield per plant, fruit weight, fruit girth and fruit length. Correlation studies and path coefficient analysis revealed that fruits per plant is the primary yield component as evidenced from its high positive correlation as well as high direct and indirect effects on yield. In the discriminant function analysis, CC 23 (Nemom, Thiruvananthapuram) ranked first, followed by CC 13 (Vithura, Thiruvananthapuram) and CC 7 (Vithura, Thiruvananthapuram). Based on the analysis for genetic divergence, the 32 accessions were grouped into six clusters, with the maximum intercluster distance observed between clusters I and VI. On the basis of the present study, the accessions CC 23, CC 13 and CC 7 were found to be promising with regard to yield, quality and mosaic resistance and the same may be utilized for further improvement.ThesisItem Open Access Sucker production and activation techniques in banana ( Musa spp. )(Department of pomology and floriculture, College of horticulture,Vellanikkara, 2016) Bhende Siddhesh Shamrao, KAU; Sajan KurienThe studies on “Sucker production and activation techniques in banana (Musa spp.)” taken up at the Central Orchard of the College of Horticulture, Vellanikkara and at Regional Agricultural Research Station (RARS), Kumarakom, Kottayam during January 2013 to September 2015. These studies were taken up exclusively for a basic understanding of the sucker genesis (origin), variation in sucker production of important cultivated clones with different ploidy and genomic constitution, photosynthate and nutrient allocatory pattern to different suckers using 14 C and 32 P and for probing the effects of physical and cultural methods (manurial doses) of sucker activation techniques. Among the different clones tested in the studies for sucker production, Karpooravalli (ABB) recorded the highest number of suckers followed by Njalipoovan (AB), Nendran (AAB), Kadali (AA), Robusta (AAA) and Bodles altafort (AAAA) respectively. Suckering habit was positively correlated with decreasing ploidy level and an increase in the M. balbisiana blood in the genomic constitution of the particular clone. Kadali (AA) recorded the highest sucker production followed by Robusta (AAA) and Bodles altafort (AAAA) within the M. accuminata ploidy. In diploids, Njalipoovan (AB) recorded the highest number of suckers over Kadali (AA) and in triploids, Karpooravalli (ABB) recorded the higher number of suckers followed by Nendran (AAB) and Robusta (AAA) respectively. Differences in sucker production were observed between the different clones with respect to planting seasons. Kadali (AA), Njalipoovan (AB), and Robusta (AAA) recorded the higher number of suckers in Sept-Oct planting, whereas in case of Nendran (AAB) and Karpooravalli (ABB), Feb-March planting recorded the best sucker production. Bodles altafort (AAAA) recorded almost the same number of suckers in all the three plantings. Morphological characters like plant height, collar girth and total number of leaves recorded very strong and positive correlation with sucker characters but negative correlation was observed with average leaf production interval. Bunch weight recorded strong significant negative correlation with improved sucker production and was positively correlated with number of dead suckers. Number ofdead suckers produced were found positively correlated with plant height, collar girth, ‘D’ leaf area and average leaf production interval and almost a similar correlation between these characters was observed in PCA and factor analysis. The cluster analysis of six banana varieties, planted in three different seasons (18 entries) revealed that the clones fell in four distinct clusters. NJALI-1, NJALI-2, NJALI-3, NEND-1, NEND-3, KARP-2 and KARP-3 were grouped in the first cluster. ROB-1, ROB-2, ROB-3 and KAD-1 were grouped in the second cluster. KAD-2, KAD-3 and NEND-2 formed the next cluster and BOD-1, BOD-2, BOD-3 and KARP-1 formed the last cluster. In case of cluster analysis obtained from pooled data of six banana varieties planted in three seasons (6 entries), first cluster was composed of NJALI, NEND and KARP. Cluster II, III and IV were composed of KAD, ROB, BOD respectively and almost similar grouping was obtained from PCA and factor analysis. PCA and factor analysis revealed that diversity contributed by different banana traits for sucker production in first, second and third components was 46.8, 27.0 and 12.2 per cent respectively. The first three major factors / principle components contributed total 85.9 per cent of the diversity. PCA and factor analysis revealed that average dry weight of quality suckers, average dry weight of total suckers, total number of suckers produced, number of underdeveloped suckers produced, total number of leaves produced, number of quality suckers produced, plant height and collar girth characters recorded their dominance in first component/factor and were the most important traits for deciding the diversity of banana varieties in the present study. Communality values in factor analysis clearly revealed that the collar girth was the high relative contributory trait for deciding sucker yield in banana. The origin or genesis and early development of the sucker primordia was observed in the cortex region of the mother corm and this is the first confirmatory report on this aspect. The photosynthesis partitioning from the mother plant to daughter suckers using 14 C in six sucker retention intact system revealed that the last formed suckers got maximum share of photosynthates. In case of 1 st , 2 nd and 3 rd suckerremoval as an individual treatments, more allocation of the photosynthates was observed to the immediately next sucker and when 4 th and 5 th suckers were removed 6 th and 3 rd suckers showed the highest recovery of 14 C, revealing the positional effects in garnering more photosynthate. This report on actual photosynthate translocation from the mother plant to the daughter suckers is also the first of its kind under actual field conditions. Again this is also the first report on the redistribution of photosynthates to daughter suckers as a consequence of individual sucker removal. The experiment conducted on nutrient cycling from mother plant to daughter suckers using 32 P at two different stages i.e. fortnight before harvest and at harvest again confirmed that the mother plant has a definite dominant role in the distribution of nutrients and also redistribution to the daughter suckers consequent to sucker removal that was more destructively observed when the bunch was retained or not harvested. The very high recovery of 32 P in the mother plant was due to the high recovery observed in the bunch. At a fortnight before harvest, in all the treatments the highest recoveries of 32 P was observed in the mother plants. When 1 st sucker was removed the next best recovery was observed in the 2 nd sucker followed by 4 th sucker, when 2 nd sucker was removed the next best recovery was observed in 4 th sucker, when 3 rd sucker was removed the next best recovery was seen in 1 st sucker followed by 2 nd sucker, when 4 th sucker was removed the 2 nd sucker resulted the next highest recovery followed by 5 th sucker and when 5 th sucker was removed the next highest recovery was observed in 1 st sucker. At the time of harvest the removal of 1 st sucker resulted the highest recovery of the activity in the mother plant followed by 2 nd sucker. Removal of 2 nd sucker resulted the highest recovery in the 1 st sucker and mother plant. The 3 rd sucker removal resulted the highest recovery in the 1 st sucker followed by 2 nd sucker, removal of 4 th sucker resulted the highest recovery in the 3 rd sucker followed by the mother plant. The removal of 5 th sucker resulted the highest recoveries in 2 nd and 4 th sucker.Both the studies on nutrient recycling revealed a trend of higher recovery in the immediately next sucker. The recovery was the highest in the mother plant in the studies on fortnight before harvest due to retention of the bunch. Nutrient redistribution pattern to daughter suckers as a consequence of phased removal of individual suckers is also being reported for the first time. With respect to the sucker activation techniques, the studies on physical methods revealed that replanting the entire clump in trenches in oblique manner ten days after harvest produced maximum total number as well as quality suckers which performed equally well with the next best treatment of cutting the pseudostem at half height ten days after harvest. However, the latter treatment was the most economical one. In case of cultural methods (manurial doses) of sucker activation, application of NPK mixture (17: 17: 17) @ 5 and 10 g N equivalent clump -1 yielded maximum number of total as well as quality suckers, but the lower dose was found to be more economical based on B: C ratio.ThesisItem Open Access Efficiency of vermiconversion and decomposition of farm residues on soil health, yield and quality of banana (Musa spp.)(Department of Science and Agricultural Chemistry, College of Horticulture,Vellanikkara, 2016) Mayadevi, M R; KAU; SushamaAn investigation entitled “Efficiency of vermiconversion and decomposition of farm residues on soil health, yield and quality of banana (Musa spp.)” was undertaken at College of Horticulture and Banana Research Station, Kannara during 2013-2015. The objectives of the study were to compare the efficiency of native and exotic earthworms on vermiconversion of farm residues and the effects of different modes of vermicomposting on soil health, yield and quality of banana and to evaluate the in situ decomposition of banana crop residues An experiment with seven treatments and three replications was laid out in randomized block design to assess the composting efficiency of native and exotic earthworms. Seven treatments included absolute control as soil (S), ex-situ compost in silpaulin vermibed without earthworms (Ex-C), ex-situ vermicompost in silpaulin vermibed using Perionyx excavatus (Ex-P), ex-situ vermicompost in silpaulin vermibed using Eisenia foetida (Ex-E), in-situ vermicompost in banana planting pits using Perionyx excavatus (In-P), in-situ vermicompost in banana planting pits using Eisenia foetida (In-E), in-situ compost in banana planting pits without earthworms (In-C). In the next study, the prepared composts were tested along with recommended doses of fertilizers and FYM to assess their effects on growth, yield and crop quality of banana var. Nendran in RBD with seven treatments replicated thrice. The treatments were absolute control (S), 300:115:450g N:P2O5:K2O plant-1 + FYM at the rate of 20 kg plant-1 (POP) , exsitu vermicompost in silpaulin vermibeds with Perionyx excavatus at the rate of 20 kg plant -1 (Ex–P), ex-situ vermicompost in silpaulin vermibeds with Eisenia foetida at the rate of 20 kg plant -1 (Ex–E) , in-situ vermicompost in crop pits with Perionyx excavatus at the rate of 20 kg plant -1 (In-P), in-situ vermicompost in crop pits with Eisenia foetida at the rate of 20 kg plant -1 (In-E), in -situ compost at the rate of 20 kg plant -1 (In-C). After the harvest of the crop, the entire residues from each plant was incorporated in the respective crop pits and the insitu degradation of the banana residues was monitored. The salient findings are summarized as follows In the first trial, the composting efficiency of native and exotic earthworms under different modes of composting was compared. Chemical properties of compost like pH, electrical conductivity, and content of primary nutrients were significantly affected by modes of composting. Exotic earthworms like Eisenia foetida produced higher auxin content in the compost whereas Perionyx excavatus registered higher dehydrogenase activity under ex-situ mode of composting. The total microbial load was recorded in the compost prepared without earthworms under both modes of composting. Compost yield was more in ex-situ composting methods and Eisenia foetida was more efficient in composting as compared to Perionyx excavatus. Humic acid characterization by Fourier Transform Infra-Red spectroscopy revealed a similar spectra from different treatments and were found to be characterized by aromatic rings and triple bonded skeleton. Presence of relatively higher quantity of polysaccharide like substances was observed in insitu mode of composting. The spectra of humic acids for ex-situ composts prepared using Perionyx excavatus revealed a nitrate band of characteristic shape appearing prominently. Perionyx excavatus produced humic acids with high aromaticity both under ex-situ and in-situ mode of composting. Scanning electron microscopy revealed neo-formed CaCO3 nodules embedded in humic acids in the ex-situ vermicompost produced by Eisenia foetida. Transmission Electron Microscopy of humic acids indicated a globular structure for vermicompost prepared by Perionyx excavatus and a lamellar structure with voids for vermicompost prepared using Eisenia foetida. On field experimentation with different treatments using Nendran banana as the test crop, the highest yield was obtained for combined application of fertilizers and farm yard manure as per POP. Number of fingers per hand and number of functional leaves were found to influence the yield, irrespective of treatments. The number of days to bunching and harvest was significantly reduced for banana under in-situ composting. Higher content of total, reducing and non-reducing sugars were observed for in-situ composting treatments. On the contrary, higher titratable acidity was recorded for the control treatment. Both vitamin C content and sensory parameters were complimentary for POP treatment. Increased absorption and translocation of nutrients such as N, P, K and Mg in fruits were observed under organic nutrition using Perionyx excavatus. For the next study, the residues of banana were added to the respective pits for monitoring the carbon and nitrogen mineralization. The carbon mineralization with respect to time was fitted to single pool exponential model to derive the rate of mineralization and half-life. It revealed crop residues pre-treated with vermicompost using exotic earthworms had a higher rate of C cumulative mineralization. Nitrogen addition by both exotic and native species of earthworms were almost similar under in-situ conditions. The banana residue decomposition by Eisenia foetida was about 3.5 times higher than that of Perionyx excavatus. Calcium content of Perionyx excavatus pre-treated residues added the maximum calcium to the soil.
