experiments with medicinal rice Njavara were conducted at Cropping
Systems Research Centre, Karamana, Thiruvananthapuram, Kerala
during summer of 2007 and 2008. The experimental design was split plot with
three replications. The treatments consisted of four establishment
techniques viz., System of
Rice Intensification SRI (M1), Integrated Crop Establishment
Method (ICM) (M2), Package of practices (PoP) (M3) of Kerala
Agricultural University and Conventional Management Practices (CMP) (M4)
in main plot. Three nutrient sources viz., (1) organic, 2) integrated use of
organic and inorganic, 3) chemical fertilizers only) were used under different
establishment techniques. Root dry matter production was determined at weekly
intervals and plant nutrients uptake was determined by calculating from the
product of dry matter, straw dry weight, grain yield and percentage of
nutrients. Results revealed that at early stages (4-6 WAT/WAS) (Weeks after
transplanting/Weeks after sowing), root dry matter production hill-1 was in the order of SRI > ICM > CMP > PoP
which changed to SRI > ICM > PoP > CMP from 7th week onwards. Maximum root dry matter (at 9th WAS/WAT) was
recorded in SRI (0.51/
 S. Morita, S. Yamada and J. Abe, “Analysis on Root System Morphology in Rice with Reference to Varietal Differences at Ripening Stage,” Japanese Journal of Crop Science, Vol. 64, 1995, pp. 58-65. doi:10.1626/jcs.64.58
 B. R. Huang, “Water Relations and Root Activities of Buchloe Dactyloides and Zoysia Japonica in Response to Localized Soil Drying,” Plant and Soil, Vol. 208, No. 2, 1999, pp. 179-186. doi:10.1023/A:1004472314631
 C. H. Willium and A. Steinbergs, “Soil Sulphur Fractions as Chemical Indices of Available Sulphur in Some Australian Soils,” Australian Journal of Agricultural Research, Vol. 100, 1959, pp. 340-352.
 N. Uphoff and R. Randriamiharisoa, “Reducing Water Use in Irrigated Rice Production with the Madagascar System of Rice Intensification (SRI),” Proceedings of the International Workshop on Water-Wise Rice Production, IRRI, Los Banos, 2002, pp. 71-87.
 M. D. Shrirame, H. J. Rajgire and A. H. Rajgiri, “Effect of Spacing and Seedling Number per Hill on Growth Attributes and Yield of Rice Hybrids under Lowland Condition,” Journal of Soil and Crops, Vol. 10, No. 1, 2000, pp. 109-113.
 A. Ayalew and T. Dejene, “Combined Application of Organic and Inorganic Fertilizers to Increase Yield of Barley and Improve Soil Properties at Fereze in Southern Ethiopia,” Innovative Systems Design and Engineering, Vol. 3, No. 1, 2012, pp. 25-35.
 S. Mithun, S. S. Mondal, D. Acharya and S. Sanjoy, “Effect of Integrated Nutrient Management on Productivity and Quality of Basmati Rice (Oryza sativa L.),” Oryza, Vol. 44, No. 2, 2007, pp. 125-129.