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Jurisandhya Bordoloi - One of the best experts on this subject based on the ideXlab platform.
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Nutrient Recycling Potential in rice–vegetable cropping sequences under in situ residue management at mid-altitude subtropical Meghalaya
Nutrient Cycling in Agroecosystems, 2008Co-Authors: Anup Das, D. P. Patel, G. C. Munda, U. K. Hazarika, Jurisandhya BordoloiAbstract:Low native soil nitrogen (N) and very low phosphorus (P) coupled with apathy of farmers towards use of fertilizer are the major constraints limiting rice productivity in the North Eastern Hill (NEH) Region of India. Field experiment was undertaken in narrow valley wetland during Kharif and pre- Kharif (rainy) seasons of 2003, 2004, and 2005, respectively, at Umiam (950 m MSL), Meghalaya to evaluate the nutrient Recycling and production Potential of rice ( Oryza sativa L.)—vegetables cropping sequences under low input in situ residue management under rainfed conditions. After rice, five vegetable crops, viz. tomato ( Lycopersicon esculentum Mill), potato ( Solanum tuberosum L.), frenchbean ( Phaseolus vulgaris ), cabbage ( Brassica oleracea L. var. capitata ), and carrot ( Daucas carota L.) were grown during pre- kharif season on temporary raised and sunken beds. Minimum tillage was given to both rice and vegetables. No external input including fertilizer, organic manure, pesticides, etc. were applied to either crops. Only the economic parts of the crops were harvested and the rest of the biomass of the entire crop and weed residues were chopped and incorporated into the soil. Among the five cropping sequences, rice–tomato gave the highest rice equivalent yield (214.40 q/ha), followed by rice–carrot (206.4 q/ha). Highest net return (rupees [Rs.] 66,635 ha^−1) was recorded in rice–carrot, closely followed by rice–tomato (Rs. 66,139 ha^−1). Rice–cabbage and rice–frenchbean were found to be on a par with each other in terms of yield and income. The highest amount of NPK Recycling was recorded for the rice–potato sequence. Weed biomass production in the different sequences ranged from 37.5 q/ha for rice–tomato to as high as 50.6 q/ha in the case of rice–fallow. Soil fertility in terms of available NPK status was found to be stable in all the crop sequences except rice–cabbage, where fertility status declined slightly. The soil biological properties such as population of Rhizobium , bacteria, phosphorus-solubilizing microorganisms, and earthworm activity were all found to be remarkably higher in the experimental field compared to other adjacent plots that are managed inorganically. It was concluded that vegetables such as tomato, carrot, potato, etc. could be profitably grown after rice without the addition of fertilizer and manure, if residues are managed effectively under temporary raised beds without deteriorating soil fertility.
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nutrient Recycling Potential in rice vegetable cropping sequences under in situ residue management at mid altitude subtropical meghalaya
Nutrient Cycling in Agroecosystems, 2008Co-Authors: Anup Das, D. P. Patel, G. C. Munda, U. K. Hazarika, Jurisandhya BordoloiAbstract:Low native soil nitrogen (N) and very low phosphorus (P) coupled with apathy of farmers towards use of fertilizer are the major constraints limiting rice productivity in the North Eastern Hill (NEH) Region of India. Field experiment was undertaken in narrow valley wetland during Kharif and pre-Kharif (rainy) seasons of 2003, 2004, and 2005, respectively, at Umiam (950 m MSL), Meghalaya to evaluate the nutrient Recycling and production Potential of rice (Oryza sativa L.)—vegetables cropping sequences under low input in situ residue management under rainfed conditions. After rice, five vegetable crops, viz. tomato (Lycopersicon esculentum Mill), potato (Solanum tuberosum L.), frenchbean (Phaseolus vulgaris), cabbage (Brassica oleracea L. var. capitata), and carrot (Daucas carota L.) were grown during pre-kharif season on temporary raised and sunken beds. Minimum tillage was given to both rice and vegetables. No external input including fertilizer, organic manure, pesticides, etc. were applied to either crops. Only the economic parts of the crops were harvested and the rest of the biomass of the entire crop and weed residues were chopped and incorporated into the soil. Among the five cropping sequences, rice–tomato gave the highest rice equivalent yield (214.40 q/ha), followed by rice–carrot (206.4 q/ha). Highest net return (rupees [Rs.] 66,635 ha−1) was recorded in rice–carrot, closely followed by rice–tomato (Rs. 66,139 ha−1). Rice–cabbage and rice–frenchbean were found to be on a par with each other in terms of yield and income. The highest amount of NPK Recycling was recorded for the rice–potato sequence. Weed biomass production in the different sequences ranged from 37.5 q/ha for rice–tomato to as high as 50.6 q/ha in the case of rice–fallow. Soil fertility in terms of available NPK status was found to be stable in all the crop sequences except rice–cabbage, where fertility status declined slightly. The soil biological properties such as population of Rhizobium, bacteria, phosphorus-solubilizing microorganisms, and earthworm activity were all found to be remarkably higher in the experimental field compared to other adjacent plots that are managed inorganically. It was concluded that vegetables such as tomato, carrot, potato, etc. could be profitably grown after rice without the addition of fertilizer and manure, if residues are managed effectively under temporary raised beds without deteriorating soil fertility.
Catarina Thormark - One of the best experts on this subject based on the ideXlab platform.
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Energy and resources, material choice and Recycling Potential in low energy buildings
2007Co-Authors: Catarina ThormarkAbstract:This paper presents three Swedish residential low energy buildings regarding the total need of energy in a life cycle perspective, the environmental impacts, effects of choice of material and the Recycling Potential. The calculated energy need for operation (space heating, electricity, hot water) was in average 50 kWh/m2 floor area per year. Simulations were made with four electricity mixes. For a service life of 50 years, production and transportation of materials accounted for 50-60 % of the impacts in the case representing the actual energy mix. This changes the prevailing picture that operation accounts for the main part of energy use. The Recycling Potential was about 35 %. Choice of materials affected the energy for the material part about 15 %. (Less)
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The effect of material choice on the total energy need and Recycling Potential of a building
Building and Environment, 2006Co-Authors: Catarina ThormarkAbstract:Minimizing the use of energy is a central task in sustainable building. Minimizing the use of natural resources and maximizing the Recycling Potential are other important tasks to take into consideration. In low-energy buildings, the embodied energy accounts for a considerable part of the total energy use of the building. Therefore, it is also imperative to pay attention to the choice of building materials used. This article presents how material choice may affect both embodied energy and Recycling Potential in one of the most energy efficient apartment-type housing projects in Sweden (calculated energy for operation is 45 kWh/m2floor area per year). Initially, the embodied energy was 40% of total energy needed for a lifetime expectancy of 50 years. Through material substitution, the embodied energy can be decreased by approximately 17% or increased by about 6%. © 2005 Elsevier Ltd. All rights reserved.
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The effect of material choice on the total energy need and Recycling Potential of a building
Building and Environment, 2006Co-Authors: Catarina ThormarkAbstract:Minimizing the use of energy is a central task in sustainable building. Minimizing the use of natural resources and maximizing the Recycling Potential are other important tasks to take into consideration. In low-energy buildings, the embodied energy accounts for a considerable part of the total energy use of the building. Therefore, it is also imperative to pay attention to the choice of building materials used. This article presents how material choice may affect both embodied energy and Recycling Potential in one of the most energy efficient apartment-type housing projects in Sweden (calculated energy for operation is 45 kWh/m(2) floor area per year). Initially, the embodied energy was 40% of total energy needed for a lifetime expectancy of 50 years. Through material substitution, the embodied energy can be decreased by approximately 17% or increased by about 6%. (C) 2005 Elsevier Ltd. All rights reserved
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a low energy building in a life cycle its embodied energy energy need for operation and Recycling Potential
Building and Environment, 2002Co-Authors: Catarina ThormarkAbstract:Total energy use during the life cycle of a building is a growing research field. The embodied energy makes up a considerable part of the total energy use in low energy buildings. Recycling provides the opportunity to reduce the embodied energy by using recycled materials and reusable recyclable materials/components. This paper presents values on embodied energy. energy needed for operation and the Recycling Potential of the most energy efficient apartment housing in Sweden (45 kWh/m(2)). In a life span of 50 years, embodied energy accounted for 45% of the total energy need. The Recycling Potential was between 35% and 40% of the embodied energy. (C) 2002 Elsevier Science Ltd. All rights reserved.
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Recycling Potential and Design for Disassembly in Buildings
2001Co-Authors: Catarina ThormarkAbstract:Recycling as part of environmental considerations has become a common feature in architecture and building construction. Recycling of building waste can make a considerable contribution to reducing the total environmental impact of the building sector. To increase the scope for Recycling in the future, aspects of Recycling have to be included in the design phase. Design for disassembly is a key task to increase the future scope for Recycling. One object has been to elucidate the environmental effects due to Recycling of building waste. The research has been limited to Recycling of building materials, its possibilities and its environmental effects. It does not include a reuse of the building itself. Nor are effects on the indoor climate, on economy or on the working environment included. Another object has been to find a method for assessing the Recycling Potential in buildings and for comparing the Recycling Potential of buildings with reference to the initial construction. The Recycling Potential can be briefly described as a way to express how much of the embodied energy and natural resources could, through Recycling, be made useable after Recycling. It has also been an object to formulate guidelines for a design for disassembly. The research work has been mainly performed through theoretical studies, collecting experiences from practitioners and through case studies. In case studies established methods of life cycle assessment and the, in the thesis suggested, Recycling Potential approach have been used. Constructions and Recycling scenarios were varied. A brief overview of how Recycling is handled in different assessment methods is presented. A method for assessing the Recycling Potential is suggested. The Recycling Potential has been calculated for different buildings and the annually produced building waste in Sweden. General guidelines are given for design for disassembly in building construction. Measures and future work are suggested to increase Recycling. (Less)
Anup Das - One of the best experts on this subject based on the ideXlab platform.
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Nutrient Recycling Potential in rice–vegetable cropping sequences under in situ residue management at mid-altitude subtropical Meghalaya
Nutrient Cycling in Agroecosystems, 2008Co-Authors: Anup Das, D. P. Patel, G. C. Munda, U. K. Hazarika, Jurisandhya BordoloiAbstract:Low native soil nitrogen (N) and very low phosphorus (P) coupled with apathy of farmers towards use of fertilizer are the major constraints limiting rice productivity in the North Eastern Hill (NEH) Region of India. Field experiment was undertaken in narrow valley wetland during Kharif and pre- Kharif (rainy) seasons of 2003, 2004, and 2005, respectively, at Umiam (950 m MSL), Meghalaya to evaluate the nutrient Recycling and production Potential of rice ( Oryza sativa L.)—vegetables cropping sequences under low input in situ residue management under rainfed conditions. After rice, five vegetable crops, viz. tomato ( Lycopersicon esculentum Mill), potato ( Solanum tuberosum L.), frenchbean ( Phaseolus vulgaris ), cabbage ( Brassica oleracea L. var. capitata ), and carrot ( Daucas carota L.) were grown during pre- kharif season on temporary raised and sunken beds. Minimum tillage was given to both rice and vegetables. No external input including fertilizer, organic manure, pesticides, etc. were applied to either crops. Only the economic parts of the crops were harvested and the rest of the biomass of the entire crop and weed residues were chopped and incorporated into the soil. Among the five cropping sequences, rice–tomato gave the highest rice equivalent yield (214.40 q/ha), followed by rice–carrot (206.4 q/ha). Highest net return (rupees [Rs.] 66,635 ha^−1) was recorded in rice–carrot, closely followed by rice–tomato (Rs. 66,139 ha^−1). Rice–cabbage and rice–frenchbean were found to be on a par with each other in terms of yield and income. The highest amount of NPK Recycling was recorded for the rice–potato sequence. Weed biomass production in the different sequences ranged from 37.5 q/ha for rice–tomato to as high as 50.6 q/ha in the case of rice–fallow. Soil fertility in terms of available NPK status was found to be stable in all the crop sequences except rice–cabbage, where fertility status declined slightly. The soil biological properties such as population of Rhizobium , bacteria, phosphorus-solubilizing microorganisms, and earthworm activity were all found to be remarkably higher in the experimental field compared to other adjacent plots that are managed inorganically. It was concluded that vegetables such as tomato, carrot, potato, etc. could be profitably grown after rice without the addition of fertilizer and manure, if residues are managed effectively under temporary raised beds without deteriorating soil fertility.
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nutrient Recycling Potential in rice vegetable cropping sequences under in situ residue management at mid altitude subtropical meghalaya
Nutrient Cycling in Agroecosystems, 2008Co-Authors: Anup Das, D. P. Patel, G. C. Munda, U. K. Hazarika, Jurisandhya BordoloiAbstract:Low native soil nitrogen (N) and very low phosphorus (P) coupled with apathy of farmers towards use of fertilizer are the major constraints limiting rice productivity in the North Eastern Hill (NEH) Region of India. Field experiment was undertaken in narrow valley wetland during Kharif and pre-Kharif (rainy) seasons of 2003, 2004, and 2005, respectively, at Umiam (950 m MSL), Meghalaya to evaluate the nutrient Recycling and production Potential of rice (Oryza sativa L.)—vegetables cropping sequences under low input in situ residue management under rainfed conditions. After rice, five vegetable crops, viz. tomato (Lycopersicon esculentum Mill), potato (Solanum tuberosum L.), frenchbean (Phaseolus vulgaris), cabbage (Brassica oleracea L. var. capitata), and carrot (Daucas carota L.) were grown during pre-kharif season on temporary raised and sunken beds. Minimum tillage was given to both rice and vegetables. No external input including fertilizer, organic manure, pesticides, etc. were applied to either crops. Only the economic parts of the crops were harvested and the rest of the biomass of the entire crop and weed residues were chopped and incorporated into the soil. Among the five cropping sequences, rice–tomato gave the highest rice equivalent yield (214.40 q/ha), followed by rice–carrot (206.4 q/ha). Highest net return (rupees [Rs.] 66,635 ha−1) was recorded in rice–carrot, closely followed by rice–tomato (Rs. 66,139 ha−1). Rice–cabbage and rice–frenchbean were found to be on a par with each other in terms of yield and income. The highest amount of NPK Recycling was recorded for the rice–potato sequence. Weed biomass production in the different sequences ranged from 37.5 q/ha for rice–tomato to as high as 50.6 q/ha in the case of rice–fallow. Soil fertility in terms of available NPK status was found to be stable in all the crop sequences except rice–cabbage, where fertility status declined slightly. The soil biological properties such as population of Rhizobium, bacteria, phosphorus-solubilizing microorganisms, and earthworm activity were all found to be remarkably higher in the experimental field compared to other adjacent plots that are managed inorganically. It was concluded that vegetables such as tomato, carrot, potato, etc. could be profitably grown after rice without the addition of fertilizer and manure, if residues are managed effectively under temporary raised beds without deteriorating soil fertility.
D. P. Patel - One of the best experts on this subject based on the ideXlab platform.
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Nutrient Recycling Potential in rice–vegetable cropping sequences under in situ residue management at mid-altitude subtropical Meghalaya
Nutrient Cycling in Agroecosystems, 2008Co-Authors: Anup Das, D. P. Patel, G. C. Munda, U. K. Hazarika, Jurisandhya BordoloiAbstract:Low native soil nitrogen (N) and very low phosphorus (P) coupled with apathy of farmers towards use of fertilizer are the major constraints limiting rice productivity in the North Eastern Hill (NEH) Region of India. Field experiment was undertaken in narrow valley wetland during Kharif and pre- Kharif (rainy) seasons of 2003, 2004, and 2005, respectively, at Umiam (950 m MSL), Meghalaya to evaluate the nutrient Recycling and production Potential of rice ( Oryza sativa L.)—vegetables cropping sequences under low input in situ residue management under rainfed conditions. After rice, five vegetable crops, viz. tomato ( Lycopersicon esculentum Mill), potato ( Solanum tuberosum L.), frenchbean ( Phaseolus vulgaris ), cabbage ( Brassica oleracea L. var. capitata ), and carrot ( Daucas carota L.) were grown during pre- kharif season on temporary raised and sunken beds. Minimum tillage was given to both rice and vegetables. No external input including fertilizer, organic manure, pesticides, etc. were applied to either crops. Only the economic parts of the crops were harvested and the rest of the biomass of the entire crop and weed residues were chopped and incorporated into the soil. Among the five cropping sequences, rice–tomato gave the highest rice equivalent yield (214.40 q/ha), followed by rice–carrot (206.4 q/ha). Highest net return (rupees [Rs.] 66,635 ha^−1) was recorded in rice–carrot, closely followed by rice–tomato (Rs. 66,139 ha^−1). Rice–cabbage and rice–frenchbean were found to be on a par with each other in terms of yield and income. The highest amount of NPK Recycling was recorded for the rice–potato sequence. Weed biomass production in the different sequences ranged from 37.5 q/ha for rice–tomato to as high as 50.6 q/ha in the case of rice–fallow. Soil fertility in terms of available NPK status was found to be stable in all the crop sequences except rice–cabbage, where fertility status declined slightly. The soil biological properties such as population of Rhizobium , bacteria, phosphorus-solubilizing microorganisms, and earthworm activity were all found to be remarkably higher in the experimental field compared to other adjacent plots that are managed inorganically. It was concluded that vegetables such as tomato, carrot, potato, etc. could be profitably grown after rice without the addition of fertilizer and manure, if residues are managed effectively under temporary raised beds without deteriorating soil fertility.
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nutrient Recycling Potential in rice vegetable cropping sequences under in situ residue management at mid altitude subtropical meghalaya
Nutrient Cycling in Agroecosystems, 2008Co-Authors: Anup Das, D. P. Patel, G. C. Munda, U. K. Hazarika, Jurisandhya BordoloiAbstract:Low native soil nitrogen (N) and very low phosphorus (P) coupled with apathy of farmers towards use of fertilizer are the major constraints limiting rice productivity in the North Eastern Hill (NEH) Region of India. Field experiment was undertaken in narrow valley wetland during Kharif and pre-Kharif (rainy) seasons of 2003, 2004, and 2005, respectively, at Umiam (950 m MSL), Meghalaya to evaluate the nutrient Recycling and production Potential of rice (Oryza sativa L.)—vegetables cropping sequences under low input in situ residue management under rainfed conditions. After rice, five vegetable crops, viz. tomato (Lycopersicon esculentum Mill), potato (Solanum tuberosum L.), frenchbean (Phaseolus vulgaris), cabbage (Brassica oleracea L. var. capitata), and carrot (Daucas carota L.) were grown during pre-kharif season on temporary raised and sunken beds. Minimum tillage was given to both rice and vegetables. No external input including fertilizer, organic manure, pesticides, etc. were applied to either crops. Only the economic parts of the crops were harvested and the rest of the biomass of the entire crop and weed residues were chopped and incorporated into the soil. Among the five cropping sequences, rice–tomato gave the highest rice equivalent yield (214.40 q/ha), followed by rice–carrot (206.4 q/ha). Highest net return (rupees [Rs.] 66,635 ha−1) was recorded in rice–carrot, closely followed by rice–tomato (Rs. 66,139 ha−1). Rice–cabbage and rice–frenchbean were found to be on a par with each other in terms of yield and income. The highest amount of NPK Recycling was recorded for the rice–potato sequence. Weed biomass production in the different sequences ranged from 37.5 q/ha for rice–tomato to as high as 50.6 q/ha in the case of rice–fallow. Soil fertility in terms of available NPK status was found to be stable in all the crop sequences except rice–cabbage, where fertility status declined slightly. The soil biological properties such as population of Rhizobium, bacteria, phosphorus-solubilizing microorganisms, and earthworm activity were all found to be remarkably higher in the experimental field compared to other adjacent plots that are managed inorganically. It was concluded that vegetables such as tomato, carrot, potato, etc. could be profitably grown after rice without the addition of fertilizer and manure, if residues are managed effectively under temporary raised beds without deteriorating soil fertility.
G. C. Munda - One of the best experts on this subject based on the ideXlab platform.
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Nutrient Recycling Potential in rice–vegetable cropping sequences under in situ residue management at mid-altitude subtropical Meghalaya
Nutrient Cycling in Agroecosystems, 2008Co-Authors: Anup Das, D. P. Patel, G. C. Munda, U. K. Hazarika, Jurisandhya BordoloiAbstract:Low native soil nitrogen (N) and very low phosphorus (P) coupled with apathy of farmers towards use of fertilizer are the major constraints limiting rice productivity in the North Eastern Hill (NEH) Region of India. Field experiment was undertaken in narrow valley wetland during Kharif and pre- Kharif (rainy) seasons of 2003, 2004, and 2005, respectively, at Umiam (950 m MSL), Meghalaya to evaluate the nutrient Recycling and production Potential of rice ( Oryza sativa L.)—vegetables cropping sequences under low input in situ residue management under rainfed conditions. After rice, five vegetable crops, viz. tomato ( Lycopersicon esculentum Mill), potato ( Solanum tuberosum L.), frenchbean ( Phaseolus vulgaris ), cabbage ( Brassica oleracea L. var. capitata ), and carrot ( Daucas carota L.) were grown during pre- kharif season on temporary raised and sunken beds. Minimum tillage was given to both rice and vegetables. No external input including fertilizer, organic manure, pesticides, etc. were applied to either crops. Only the economic parts of the crops were harvested and the rest of the biomass of the entire crop and weed residues were chopped and incorporated into the soil. Among the five cropping sequences, rice–tomato gave the highest rice equivalent yield (214.40 q/ha), followed by rice–carrot (206.4 q/ha). Highest net return (rupees [Rs.] 66,635 ha^−1) was recorded in rice–carrot, closely followed by rice–tomato (Rs. 66,139 ha^−1). Rice–cabbage and rice–frenchbean were found to be on a par with each other in terms of yield and income. The highest amount of NPK Recycling was recorded for the rice–potato sequence. Weed biomass production in the different sequences ranged from 37.5 q/ha for rice–tomato to as high as 50.6 q/ha in the case of rice–fallow. Soil fertility in terms of available NPK status was found to be stable in all the crop sequences except rice–cabbage, where fertility status declined slightly. The soil biological properties such as population of Rhizobium , bacteria, phosphorus-solubilizing microorganisms, and earthworm activity were all found to be remarkably higher in the experimental field compared to other adjacent plots that are managed inorganically. It was concluded that vegetables such as tomato, carrot, potato, etc. could be profitably grown after rice without the addition of fertilizer and manure, if residues are managed effectively under temporary raised beds without deteriorating soil fertility.
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nutrient Recycling Potential in rice vegetable cropping sequences under in situ residue management at mid altitude subtropical meghalaya
Nutrient Cycling in Agroecosystems, 2008Co-Authors: Anup Das, D. P. Patel, G. C. Munda, U. K. Hazarika, Jurisandhya BordoloiAbstract:Low native soil nitrogen (N) and very low phosphorus (P) coupled with apathy of farmers towards use of fertilizer are the major constraints limiting rice productivity in the North Eastern Hill (NEH) Region of India. Field experiment was undertaken in narrow valley wetland during Kharif and pre-Kharif (rainy) seasons of 2003, 2004, and 2005, respectively, at Umiam (950 m MSL), Meghalaya to evaluate the nutrient Recycling and production Potential of rice (Oryza sativa L.)—vegetables cropping sequences under low input in situ residue management under rainfed conditions. After rice, five vegetable crops, viz. tomato (Lycopersicon esculentum Mill), potato (Solanum tuberosum L.), frenchbean (Phaseolus vulgaris), cabbage (Brassica oleracea L. var. capitata), and carrot (Daucas carota L.) were grown during pre-kharif season on temporary raised and sunken beds. Minimum tillage was given to both rice and vegetables. No external input including fertilizer, organic manure, pesticides, etc. were applied to either crops. Only the economic parts of the crops were harvested and the rest of the biomass of the entire crop and weed residues were chopped and incorporated into the soil. Among the five cropping sequences, rice–tomato gave the highest rice equivalent yield (214.40 q/ha), followed by rice–carrot (206.4 q/ha). Highest net return (rupees [Rs.] 66,635 ha−1) was recorded in rice–carrot, closely followed by rice–tomato (Rs. 66,139 ha−1). Rice–cabbage and rice–frenchbean were found to be on a par with each other in terms of yield and income. The highest amount of NPK Recycling was recorded for the rice–potato sequence. Weed biomass production in the different sequences ranged from 37.5 q/ha for rice–tomato to as high as 50.6 q/ha in the case of rice–fallow. Soil fertility in terms of available NPK status was found to be stable in all the crop sequences except rice–cabbage, where fertility status declined slightly. The soil biological properties such as population of Rhizobium, bacteria, phosphorus-solubilizing microorganisms, and earthworm activity were all found to be remarkably higher in the experimental field compared to other adjacent plots that are managed inorganically. It was concluded that vegetables such as tomato, carrot, potato, etc. could be profitably grown after rice without the addition of fertilizer and manure, if residues are managed effectively under temporary raised beds without deteriorating soil fertility.
