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Articles by U. Surendran
Total Records ( 2 ) for U. Surendran
  S. Rama Subramoniam , K. Subbiah V.P. Duraisami and U. Surendran
  Micronutrients disorders, which emanated from the adoption of intensive agriculture coupled with the use of high analysis NPK fertilizers and scarce use of organic manure and limited use of crop residues become dominant in grape growing tracts. The present energy crisis and rapidly increasing fertilizer price have necessitated the efficient utilization of micronutrients to achieve increased and sustainable productivity. Efficient micronutrient management embodies the use of effective micronutrient source and techniques on the time and mode of application to grape is necessary in this condition. A field experiment was conducted with Thompson seedless grapes with treatments involving micronutrients as soil application and foliar spray by adopting randomized block design with three replications. To arrive cost effective technology for correcting the micronutrients deficiencies for sustaining grapes yield with benefit: cost ratio, recommended doses of N, P and K fertilizers along with foliar sprays of ZnSO4 (0.2%) + boric acid (0.2%) + FeSO4 (0.2%) + MnSO4 (0.2%) + MgSO4 (0.5%) + CaCl2 (0.5%) + KNO3 (0.5%) + urea (1%) at blooming and 15 days after blooming stages was best. The quality of fruits such as juice content, TSS, titratable acidity, specific gravity, total sugar and TSS/acidity ratio were also higher in the above treatment.
  U. Surendran and V. Murugappan
  This study attempts to apply nutrient monitoring (NUTMON) methodology for carrying out nutrient audits, which includes calculation of nutrient balance at a regional level and evaluation of trends in nutrient mining/enrichment. A nutrient budget is an account of inputs and outputs of nutrients in an agricultural system. NUTMON is a multiscale approach that assess the stocks and flows of N, P and K in an well defined geographical unit based on the inputs viz., mineral fertilizers, manures, atmospheric deposition and sedimentation and outputs of harvested crop produces, residues, leaching, denitrification and erosion losses. In the present investigation an attempt was made for nutrient budgeting at district scale in a semi-arid region of South India, using NUTMON methodology. Nutrient balance was worked out for Coimbatore district, which is the potential agricultural area in Western Zone of Tamil Nadu, India. The calculated nutrient balances were negative for N (–10.1 kg ha-1) and K (–9.8 kg ha-1) and positive for P (21.9 kg ha-1). Soil nutrient pool has to offset the negative balance of N and K, there will be an expected mining of nutrient from the soil reserve in the study area. The management options to mitigate this mining by manipulating all inputs and outputs in a judicious way with an integrated system approach are also discussed.
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