R
R. Nagarajan
Researcher at Tamil Nadu Rice Research Institute
Publications - 12
Citations - 1267
R. Nagarajan is an academic researcher from Tamil Nadu Rice Research Institute. The author has contributed to research in topics: Nutrient management & Soil fertility. The author has an hindex of 7, co-authored 12 publications receiving 1174 citations.
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Journal ArticleDOI
Site-specific nutrient management for intensive rice cropping systems in Asia
Achim Dobermann,Achim Dobermann,Christian Witt,David Dawe,S. Abdulrachman,H. C. Gines,R. Nagarajan,S. Satawathananont,T. T. Son,P. S. Tan,Guanghuo Wang,N. V. Chien,V. T. K. Thoa,C. V. Phung,P. Stalin,P. Muthukrishnan,V. Ravi,M. Babu,S. Chatuporn,J. Sookthongsa,Q. Sun,R. Fu,G. C. Simbahan,M. A. A. Adviento +23 more
TL;DR: In this paper, a site-specific nutrient management (SSNM) approach was proposed to improve the quality of rice fields by fine-tuning nitrogen applications based on season-specific rules and field-specific monitoring of crop N status.
Journal ArticleDOI
Internal nutrient efficiencies of irrigated lowland rice in tropical and subtropical Asia.
Christian Witt,Achim Dobermann,S. Abdulrachman,H. C. Gines,Wang Guang-huo,R. Nagarajan,S Satawatananont,T. T. Son,P. S. Tan,Le Van Tiem,G. C. Simbahan,D. C. Olk +11 more
TL;DR: In this article, the authors used the QUEFTS (Quantitative Evaluation of the Fertility of Tropical Soils) approach to estimate the nitrogen (N), phosphorus (P) and potassium (K) requirements of irrigated rice in South and Southeast Asia.
Journal ArticleDOI
Soil Fertility and Indigenous Nutrient Supply in Irrigated Rice Domains of Asia
A. Dobermann,A. Dobermann,Christian Witt,S. Abdulrachman,H. C. Gines,R. Nagarajan,T. T. Son,P. S. Tan,Guanghuo Wang,N. V. Chien,V. T. K. Thoa,C. V. Phung,P. Stalin,P. Muthukrishnan,V. Ravi,M. Babu,G. C. Simbahan,M. A. A. Adviento +17 more
TL;DR: Grain yields in nutrient omission plots were strongly correlated with each other and also with the yield in the fertilized farmers' fields, which caused large variability of IS among irrigated rice domains, years, growing seasons, and fields within a domain.
Journal ArticleDOI
Estimating Indigenous Nutrient Supplies for Site‐Specific Nutrient Management in Irrigated Rice
A. Dobermann,A. Dobermann,Christian Witt,S. Abdulrachman,H. C. Gines,R. Nagarajan,T. T. Son,P. S. Tan,Guanghuo Wang,N. V. Chien,V. T. K. Thoa,C. V. Phung,P. Stalin,P. Muthukrishnan,V. Ravi,M. Babu,G. C. Simbahan,M. A. A. Adviento,V. Bartolome +18 more
TL;DR: In this article, the authors evaluated the relationship between plant N, P, and K uptake with soil tests or grain yield measured in 0-N, 0-P, and 0-K plots and developed guidelines for the use of omission plots in site-specific management.