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Sanetra, C M and Ito, O and Virmani, S M and Vlek, P L G (1998) Remobilization of nitrogen from senescing leaves of pigeonpea (Cajanus cajan (L.) Millsp.): genotypic differences across maturity groups? Journal of Experimental Botany, 49 (322). pp. 853-862. ISSN 0022-0957
Srinivasa Rao, Ch and Lal, R and Prasad, J V N S and Gopinath, K A and Singh, R and Jakkula, V S and Sahrawat, K L and Venkateswarlu, B and Sikka, A K and Virmani, S M (2015) Potential and Challenges of Rainfed Farming in India. In: Advances in Agronomy. Elsevier, pp. 115-164. ISBN 9780128030523
Alagarswamy, G and Singh, P and Hoogenboom, G and Wani, S P and Pathak, P and Virmani, S M (2000) Evaluation and application of the CROPGRO-Soybean simulation model in a Vertic Inceptisol. Agricultural Systems,, 63 (1). pp. 19-32. ISSN 0308-521X
Ali, M and Joshi, P K and Pande, S and Asokan, M and Virmani, S M and Kumar, Ravi and Kandpal, B K (2000) Legumes in the Indo-Gangetic Plain of India. In: Legumes in rice and wheat cropping systems of the Indo-Gangetic Plain - constraints and opportunities. International Crops Research Institute for the Semi-Arid Tropics, Patancheru, Andhra Pradesh, India, pp. 35-70. ISBN 92-9066-418-5
Singh, P and Srinivas, K and Victor, U S and Patil, J D and Virmani, S M and Wani, S P (2000) Potential of Opportunity Double Cropping with Short Duration Legumes in the Rabi Sorghum Areas of India. Indian Journal of Dryland Agricultural Research and Development, 15 (1). pp. 64-72.
Johansen, C and Duxbury, J M and Virmani, S M and Gowda, C L L and Pande, S and Joshi, P K (2000) Research and development priorities for legumes and legume-based cropping systems in the Indo-Gangetic Plain. In: Legumes in rice and wheat cropping systems of the Indo-Gangetic Plain - constraints and opportunities. International Crops Research Institute for the Semi-Arid Tropics, Patancheru, Andhra Pradesh, India, pp. 219-223. ISBN 92-9066-418-5
Eswaran, H and Beinroth, F H and Virmani, S M (2000) Resource management domains: a biophysical unit for assessing and monitoring land quality. Agriculture, Ecosystems and Environment, 81 (2). pp. 155-162. ISSN 0167-8809
Virmani, S M and Shurapli, J N (1999) Climate Prediction for Sustainable Production of Rainfed Groundnuts in SAT Crop Establishment Risks in the Anantapur Region. Manual. International Crops Research Institute for the Semi-Arid Tropics.
Singh, P and Alagarswamy, G and Pathak, P and Wani, S P and Hoogenboom, G and Virmani, S M (1999) Soybean-chickpea rotation on Vertic Inceptisols I. Effect of soil depth and landform on light interception, water balance and crop yields. Field Crops Research, 63 (3). pp. 211-224.
Singh, P and Alagarswamy, G and Hoogenboom, G and Pathak, P and Wani, S P and Virmani, S M (1999) Soybean-chickpea rotation on Vertic Inceptisols II. Long-term simulation of water balance and crop yields. Field Crops Research, 63 (3). pp. 225-236. ISSN 0378-4290
Sanetra, C M and Ito, O and Virmani, S M and Vlek, P L G (1998) Remobilization of nitrogen from senescing leaves of pigeonpea (Cajanus cajan (L.) Millsp.): genotypic differences across maturity groups? Journal of Experimental Botany, 49 (322). pp. 853-862. ISSN 0022-0957
Virmani, S M (1997) Risks of aflatoxin contamination of groundnut in Vietnam: a preliminary study. In: Aflatoxin contamination problems in groundnut in Asia: proceedings of the First Asia WorkingGroup Meeting. Ministry of Agriculture and Rural Development, 27- 29 May 1996, Hanoi, Vietnam.
Saxena, N P and Saxena, M C and Johansen, C and Virmani, S M and Harris, H (1996) Adaptation of Chickpea in the West Asia and North Africa Region. ICRISAT-ICARDA. ISBN 92-9066-336-7
Saxena, N P and Saxena, M C and Johansen, C and Virmani, S M and Harris, H (1996) Future Research Priorities for Chickpea in WANA and SAT. In: Adaptation of Chickpea in the West Asia and North Africa Region, Nov 1992, ICARDA, Aleppo, Syria.
Virmani, S M (1996) Geographical Information System: Its Use and Relevance in Adaptation of Crops in Varied Agroenvironments. In: Adaptation of Chickpea in the West Asia and North Africa Region, Nov 1992, ICARDA, Aleppo, Syria.
Singh, P and Virmani, S M (1996) Modeling growth and yield of chickpea (Cicer arietinum L.). Field Crops Research, 46 (1-3). pp. 41-59. ISSN 0378-4290
Singh, P and Boote, K J and Virmani, S M (1994) Evaluation of the groundnut model PNUTGRO for crop response to plant population and row spacing. Field Crops Research, 39 (2-3). pp. 163-170. ISSN 0378-4290
Virmani, S M (1994) UNCED Agenda 21: The New Challenges for Soils Research. Journal of the Indian Sociely of Soii Science, 42 (4). pp. 516-524. ISSN 0019-638X
Johansen, C and Virmani, S M and Lai, T V and Nam, N H and Nigam, S N (1993) Use of Environmental Information Systems in Analyzing Crop Adaptation and Product ion Constraint s as an Aid to On- farm Research. In: Approaches to on-farm research in Asia: summary proceedings of the Regional Workshop on On-farm Adaptive Research, 18-20 Feb. 1993, Ho Chi Minh City, Vietnam.
Kanwar, J S and Virmani, S M and Das, S K (1992) Farming Systems Research in India: A Historical Perspective. Experimental Agriculture, 28 (1). pp. 1-17. ISSN 0014-4797
Sivakumar, M V K and Manu, A and Virmani, S M and Kanemasu, E T (1992) Relation between climate and soil productivity in the tropics. In: Myths and science of soils of the tropics: proceedings SSSA, 17 October 1989, Las Vegas, Nevada .
Virmani, S M and Faris, D G and Johansen, C (1991) Agroclimatology of Asian Grain Legumes Chickpea, Pigeonpea, and Groundnut. Technical Report. International Crops Research Institute for the Semi-Arid Tropics.
Monteith, J L and Virmani, S M (1991) Quantifying Climatic Risk In The Semiarid Tropics: ICRISAT Experience. In: Climatic Risk in Crop Production: Models and Management for the Semiarid Tropics and Subtropics, 2 - 6 July, 1990, Brisbane, Australia.
Abdulmumin, S and Singh, P and Virmani, S M (1991) WATERMAN: an operational soil water balance model compatible with IBSNAT data files. In: Soil Water Balance in the Sudano-Sahellan Zone Proceedings of the Niamey Workshop, February 1991, Niamey, Niger.
Naveen, P and Seetharama, N and Midya, D and Virmani, S M and Yogeshwara Rao, A (1991) An analysis of Anantapur climate. Monograph. ICRISAT( Patancheru).
Virmani, S M and Eswaran, H (1990) Characterizing Natural Resources For Sustainable Agriculture In The Semi-Arid Tropics. In: Proceedings of the International Symposium on Natural Resources Management for a Sustainable Agriculture, February 6-10, 1990, New Delhi, India.
Alagarswamy, G and Virmani, S M and Godwin, I D and Singh, U (1990) Evaluating Fertilizer Use Strategies For Sorghum -A Systems Approach. In: Technology blending and agrarian prosperity. Malhotra Pub. House, New Delhi, India, pp. 71-81.
Singh, P and Virmani, S M (1990) Evapotranspiration and yield of irrigated chickpea. Agricultural and Forest Meteorology, 52 (3-4). pp. 333-345. ISSN 0168-1923
Jarwal, S D and Singh, Phool and Virmani, S M (1990) Influence of planting geometry on photosynthetically active radiation interception and dry matter production relationships in pearl millet. Biomass, 21 (4). pp. 273-284.
Eswaran, H and Virmani, S M (1990) The Soil Component In Sustainable Agriculture. In: Proceedings of the First International Synlposium on Natural Resources Management for a Sustainable Agriculture, February 6-10, 1990, New Delhi, India.
Seetharama, N and Huda, A K S and Virmani, S M and Monteith, J L (1990) Sorghum in the Semi-Arid Tropics: Agroclimatology, Physiology and Modelling. In: Proceedings of the International Congress of Plant Physiology, 15-20 February 1988, New Delhi, India.
Virmani, S M and Rao, M R and Srivastava, K L (1989) Approaches to the Management of Vertisols in the Semi-Arid Tropics: The ICRISAT Experience. In: IBSRAM Inaugural Workshop: Management of Vertisols for Improved Agricultural Production, 18-22 Feb 1985, Patancheru, Andhra Prdesh India.
Virmani, S M and Tandon, H L S and Alagarswamy, G (1989) Modeling the Growth and Development of Sorghum and Pearl Millet. Technical Report. International Crops Research Institute for the Semi-Arid Tropics.
Virmani, S M and Huda, A K S and Singh, R P and Rego, T J and Rao, K V S (1988) Elements of Climate - Their Relevance to Crop Productivity and Fertilizer Use Planning in the Semiarid Tropics. In: Proceedings of a Colloquium Soil Fertility and Fertilizer Management in Semiarid Tropical India, 10-77 October 7988, ICRISAT Patancheru, Andhra Padesh, India.
Huda, A K S and Virmani, S M (1987) Agroclimatic Environment of Chickpea and Pegeonpea. In: Consultants' Workshop: Adaptation of Chickpea and Pigeonpea to Abiotic Stresses, 19-21 Dec 1984, ICRISAT, India.
Huda, A K S and Sivakumar, M V K and Rama, Y V S and Sekaran, J G and Virmani, S M (1987) Observed and simulated responses of two sorghum cultivars to different water regimes. Field Crops Research, 16 (4). pp. 323-335. ISSN 0378-4290
Virmani, S M and Singh, P (1986) Agroclimatological Characteristics of the Groundnut-Growing Regions in the Semi-Arid Tropics. In: International Symposium: Agrometeorology of Groundnut, 21-26 Aug 1985, Niamey, Niger.
Sivakumar, M V K and Virmani, S M and Beckerman, S R (1986) Agrometeorology of Groundnut Proceedings of an International Symposium ICRISAT Sahelian Center Niamey, Niger 21-26 August 1985. Other. International Crops Research Institute for the Semi-Arid Tropics.
Virmani, S M and Sharma, D and Venkateswarlu, J V (1986) Management Of Vertisols And Associated Soils. In: National Seminar on Water Management--the Key to Developing Agriculture, 28-30 April 1986, Indian National Science Academy, New Delhi.
Kanwar, J S and Virmani, S M (1986) Management Of Vertisols For Improved Crop Production In The Semi-Arid Topics: A Plan For A Technology Transfer Network In Africa. In: First IBSRAM (International Board on Soil Research and Management) Regional Networkshop in Africa on Improved Management of Vertisols under Semi-Arid Conditions, 1-6 Dec 1986, Nairobi, Kenya.
Huda, A K S and Virmani , S M and Sekaran, J O (1986) Simulation model for sorghum crop and its application. Indian Journal of Plant Physiology, 29 (4). pp. 317-330. ISSN 0974-0252
Virmani, S M and Huda, A K S (1985) Variability of rainfall and soil water in the dry tropics: A case study for selected locations of India, Niger and Botswana. In: Task Force Meeting on Assessment at Climate Impacts on Agriculture, 1985, Lexinburg, Austria.
Sivakumar, M V K and Konate, M and Virmani, S M (1984) Agroclimatology of West Africa: Mali. International Crops Research Institute for the Semi-Arid Tropics, Patancheru Andhra Pradesh India.
Virmani, S M and Sivakumar, M V K (1984) Agrometeorology of Sorghum and Millet in the Semi-Arid Tropics. Technical Report. International Crops Research Institute for the Semi-Arid Tropics.
Sivakumar, M V K and Virmani, S M (1984) Crop productivity in relation to interception of photosynthetically active radiation. Agricultural and Forest Meteorology, 31 (2). pp. 131-141. ISSN 0168-1923
El-Swaify, S A and Walker, T S and Virmani, S M (1984) Dryland Management Alternatives and Research Needs for Alfisols in the Semi-Arid Tropics. Other. International Crops Research Institute for the Semi-Arid Tropics.
Huda, A K S and Sivakumar, M V K and Virmani, S M and Seetharama, N and Singh, S and Sekaran, J G (1984) Modeling the Effect of Environmental Factors on sorghum Growth and Development. In: Agrometeorology of SOrghum and Millet in the Semi-Arid Tropics: Proceedings of the International Sysmposium, 15-20 Nov. 1982, ICRISAT Patancheru, India.
Sivakumar, M V K and Huda, A K S and Virmani, S M (1984) Physical Environment of Sorghum- and Millet-growing Areas in South Asia. In: Agrometeorology of Sorghum and Millet in the Semi-Arid Tropics: Proceedings of the International Symposium, 15-20 November, 1982, Patancheru. A P lndla.
Huda, A K S and Sri Rama, Y V and Virmani, S M (1984) A manual for collection of relevant data sets for agroclimatological studies. Manual. ICRISAT, Patancheru, Andhra Pradesh, India.
Srivastava, K L and Virmani, S M and Walker, T S (1983) Farming Systems Research In A Watershed Framework: Experience Relative To Vertisol Management In Semi-Arid Tropical India. In: Proceedings of Kansas State University's 1983 Farming Systems Research Symposium Animals In The Farming System, Oct 31-2Nov 1983, Kansas, USA.
Srivastava, K L and Miranda, S M and Gunasekera, B C G and Virmani, S M (1982) Land and water management in rainfed farming systems. In: IRAT-ICRISAT Workshop on Water Management, 3-6 May, 1982, Montpel!ier, France.
Kanwar, J S and Kampen, J and Virmani, S M (1982) Management of Vertisols for Maximising Crop Production - ICRISAT Experience. In: Vertisols and rice soils of the tropics Symposia papers II Transactions of the 12th International Congress of Soil Science, 8-16 Feb 1982, New Delhi, India.
Sivakumar, M V K and Virmani, S M (1982) The Physical Environment. In: Sorghum in the Eighties: Proceedings of Symposium on Sorghum, 2-7 November 1981, ICRISAT Patancheru, Andhra Padesh, India.
Virmani, S M and Sahrawat, K L and Burford, J R (1982) Physical and Chemical Properties of Vertisols and their Management. In: Twelfth International Congress of Soil Science, 8-16 February 1982, New Delhi, India.
Ryan, J G and Virmani, S M and Swindale, L D (1982) Potential Technologies for Deep Black Soils in Relatively Dependable Rainfall Regions of India. In: Seminar on Innovative Technology for Rural Development, 15-17 April 1982, New Delhi, India.
Huda, A K S and Sivakumar, M V K and Alagarswamy, G and Virmani, S M and Vanderlip, R L (1982) Problems and Prospects in Modeling Pearl Millet Growth and Development: A Suggested Framework for a Millet Model. In: Agrometeorology of Sorghum and Millet in the Semi-Arid Tropics: Proceedings of the International Symposium, 15-20 November, 1982, Patancheru. A P lndla.
Virmani, S M and Sivakumar, M V K and Reddy, S J (1982) Rainfall probability estimates for selected locations of semi-arid India. Research Bulletin No. 1. Monograph. International Crops Research Institute for the Semi-Arid Tropics , Patancheru, Andhra Pradesh, India .
Huda, A K S and Sivakumar, M V K and Virmani, S M and Sekaran, J G (1982) Report of collaborative multilocation sorghum modeling experiment (1980-1981). In: Collaborative Multilocation Sorghum Modeling Experiment (Cooperators' Meeting), 1982, Patancheru, Andhra Pradesh, India.
Huda, A K S and Sivakumar, M V K and Virmani, S M and Sekaran, J G (1982) Report of the collaborative multilocation sorghum modeling experiment (1978-1982). In: Collaborative Multilocation Sorghum Modeling Experiment (Cooperators' Meeting), 1982, Patancheru, Andhra Pradesh, India.
Swindale, L D and Virmani, S M and Sivakumar, M V K (1981) Climatic Variability And Crop Yields In The Semi-Arid Tropics. In: Proceedings of the international workshop on energy/food, 9-12 December, 1980, Germany.
Virmani, S M and Sivakumar, M V K and Reddy, S J (1980) Climatic classification of semi-arid tropics in relation to farming systems research. In: Climatic classification: a consultants' meeting , 14-16 Apr 1980 , ICRISAT Patancheru, Andhra Pradesh, India, .
Virmani, S M and Sivakumar, M V K and Reddy, S. J., S J (1980) Climatic classification of the semi-arid tropics in relation to farming systems research. In: International Crops Research Institute for the Semi-Arid Tropics: Climatic classification: a consultants' meeting, 14-16 April 1980. , ICRISAT Patancheru, Andhra Pradesh, India.
Virmani, S M and Sivakumar, M V K (1980) Climatic classification: a consultants' meeting at ICRISAT Patancheru, Andhra Pradesh, India, 14-16 Apr 1980. International Crops Research Institute for the Semi-Arid Tropics , Patancheru, Andhra Pradesh, India .
Binswanger, H P and Virmani, S M and Kampen, J (1980) Farming Systems Components for Selected Areas in India: Evidence from ICRISAT. Monograph. International Crops Research Institute for the Semi-Arid Tropics, Patancheru, Andhra Pradesh, India.
Sivakumar, M V K and Virmani, S M (1980) Growth and Resource Use of Maize, Pigeonpea and Maize/Pigeonpea Intercrop in an Operational Research Watershed. Experimental Agriculture, 16 (4). pp. 377-386. ISSN 0014-4797
Virmani, S M and Reddy, S J and Bose, M N S (1980) A Handbook on the Rainfall Climatology of West Africa: Data for Selected Locations. Manual. International Crops Research Institute for the Semi-Arid Tropics.
Virmani, S M and Reddy, S J and Bose, M N S (1980) Manuel de climatologie pluviale de fAfrique occidentale: Donnees pour des stations selectionnees. Manual. International Crops Research Institute for the Semi-Arid Tropics.
Virmani, S M and Sivakumar, M V K and Sarkar, R P (1980) Rainfall Probability and Tailoring Agriculture to Match it. In: Proceedings of the Symposium on Rainwater and Dryland Agriculture , 3 October 1980, New Delhi, India.
Sivakumar, M V K and Virmani, S M (1979) Measuring leaf-water potential in chickpea with a pressure chamber. Experimental Agriculture, 15 (4). pp. 377-383. ISSN 0014-4797
Huda, A K S and Virmani, S M (1979) A systems analysis approach to developing cropping systems in the semi-arid tropics. In: International Conference of Operations Research in Agriculture and Water Resources, 1979, Jerusalem, Israel.
Virmani, S M (1975) The agricultural climate of the Hyderabad Region in relation to crop planning (A sample analysis). Monograph. ICRISAT, Patancheru, Andhra Pradesh, India.
Sivakumar, M V K and Konate, M and Virmani, S M (1984) Agroclimatology of West Africa: Mali. International Crops Research Institute for the Semi-Arid Tropics, Patancheru Andhra Pradesh India.
Sivakumar, M V K and Manu, A and Virmani, S M and Kanemasu, E T (1992) Relation between climate and soil productivity in the tropics. In: Myths and science of soils of the tropics: proceedings SSSA, 17 October 1989, Las Vegas, Nevada .
Sivakumar, M V K and Virmani, S M and Beckerman, S R (1986) Agrometeorology of Groundnut Proceedings of an International Symposium ICRISAT Sahelian Center Niamey, Niger 21-26 August 1985. Other. International Crops Research Institute for the Semi-Arid Tropics.
Sivakumar, M V K and Konate, M and Virmani, S M (1984) Agroclimatology of West Africa: Mali. International Crops Research Institute for the Semi-Arid Tropics, Patancheru Andhra Pradesh India.
Sivakumar, M V K and Virmani, S M (1982) The Physical Environment. In: Sorghum in the Eighties: Proceedings of Symposium on Sorghum, 2-7 November 1981, ICRISAT Patancheru, Andhra Padesh, India.
Huda, A K S and Sivakumar, M V K and Alagarswamy, G and Virmani, S M and Vanderlip, R L (1982) Problems and Prospects in Modeling Pearl Millet Growth and Development: A Suggested Framework for a Millet Model. In: Agrometeorology of Sorghum and Millet in the Semi-Arid Tropics: Proceedings of the International Symposium, 15-20 November, 1982, Patancheru. A P lndla.
Abdulmumin, S and Singh, P and Virmani, S M (1991) WATERMAN: an operational soil water balance model compatible with IBSNAT data files. In: Soil Water Balance in the Sudano-Sahellan Zone Proceedings of the Niamey Workshop, February 1991, Niamey, Niger.
Sanetra, C M and Ito, O and Virmani, S M and Vlek, P L G (1998) Remobilization of nitrogen from senescing leaves of pigeonpea (Cajanus cajan (L.) Millsp.): genotypic differences across maturity groups? Journal of Experimental Botany, 49 (322). pp. 853-862. ISSN 0022-0957
Saxena, N P and Saxena, M C and Johansen, C and Virmani, S M and Harris, H (1996) Future Research Priorities for Chickpea in WANA and SAT. In: Adaptation of Chickpea in the West Asia and North Africa Region, Nov 1992, ICARDA, Aleppo, Syria.
Sivakumar, M V K and Manu, A and Virmani, S M and Kanemasu, E T (1992) Relation between climate and soil productivity in the tropics. In: Myths and science of soils of the tropics: proceedings SSSA, 17 October 1989, Las Vegas, Nevada .
Srinivasa Rao, Ch and Lal, R and Prasad, J V N S and Gopinath, K A and Singh, R and Jakkula, V S and Sahrawat, K L and Venkateswarlu, B and Sikka, A K and Virmani, S M (2015) Potential and Challenges of Rainfed Farming in India. In: Advances in Agronomy. Elsevier, pp. 115-164. ISBN 9780128030523
Alagarswamy, G and Singh, P and Hoogenboom, G and Wani, S P and Pathak, P and Virmani, S M (2000) Evaluation and application of the CROPGRO-Soybean simulation model in a Vertic Inceptisol. Agricultural Systems,, 63 (1). pp. 19-32. ISSN 0308-521X
Johansen, C and Duxbury, J M and Virmani, S M and Gowda, C L L and Pande, S and Joshi, P K (2000) Research and development priorities for legumes and legume-based cropping systems in the Indo-Gangetic Plain. In: Legumes in rice and wheat cropping systems of the Indo-Gangetic Plain - constraints and opportunities. International Crops Research Institute for the Semi-Arid Tropics, Patancheru, Andhra Pradesh, India, pp. 219-223. ISBN 92-9066-418-5
Eswaran, H and Beinroth, F H and Virmani, S M (2000) Resource management domains: a biophysical unit for assessing and monitoring land quality. Agriculture, Ecosystems and Environment, 81 (2). pp. 155-162. ISSN 0167-8809
Singh, P and Alagarswamy, G and Pathak, P and Wani, S P and Hoogenboom, G and Virmani, S M (1999) Soybean-chickpea rotation on Vertic Inceptisols I. Effect of soil depth and landform on light interception, water balance and crop yields. Field Crops Research, 63 (3). pp. 211-224.
Singh, P and Alagarswamy, G and Hoogenboom, G and Pathak, P and Wani, S P and Virmani, S M (1999) Soybean-chickpea rotation on Vertic Inceptisols II. Long-term simulation of water balance and crop yields. Field Crops Research, 63 (3). pp. 225-236. ISSN 0378-4290
Singh, P and Boote, K J and Virmani, S M (1994) Evaluation of the groundnut model PNUTGRO for crop response to plant population and row spacing. Field Crops Research, 39 (2-3). pp. 163-170. ISSN 0378-4290
Sivakumar, M V K and Manu, A and Virmani, S M and Kanemasu, E T (1992) Relation between climate and soil productivity in the tropics. In: Myths and science of soils of the tropics: proceedings SSSA, 17 October 1989, Las Vegas, Nevada .
Alagarswamy, G and Virmani, S M and Godwin, I D and Singh, U (1990) Evaluating Fertilizer Use Strategies For Sorghum -A Systems Approach. In: Technology blending and agrarian prosperity. Malhotra Pub. House, New Delhi, India, pp. 71-81.
Huda, A K S and Sivakumar, M V K and Alagarswamy, G and Virmani, S M and Vanderlip, R L (1982) Problems and Prospects in Modeling Pearl Millet Growth and Development: A Suggested Framework for a Millet Model. In: Agrometeorology of Sorghum and Millet in the Semi-Arid Tropics: Proceedings of the International Symposium, 15-20 November, 1982, Patancheru. A P lndla.
Johansen, C and Virmani, S M and Lai, T V and Nam, N H and Nigam, S N (1993) Use of Environmental Information Systems in Analyzing Crop Adaptation and Product ion Constraint s as an Aid to On- farm Research. In: Approaches to on-farm research in Asia: summary proceedings of the Regional Workshop on On-farm Adaptive Research, 18-20 Feb. 1993, Ho Chi Minh City, Vietnam.