Effect of STCR-IPNS technology for targeted yield in rice under sodic soil Rajammal T Sherene Jenita1,*, Santhy R2, Maragatham S3 1ICAR-Krishi Vigyan Kendra (TNAU), Pudukkottai, Vamban-522303, Tamil Nadu, India 2Directorate of Natural Resource Management, Tamil Nadu Agricultural University, Coimbatore-641003, Tamil Nadu, India 3Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore-641003, Tamil Nadu, India *Email for correspondence: shereneraj@yahoo.co.in
Online published on 6 December, 2021. Abstract For evaluating the effect of STCR-IPNS (soil test crop response-integrated plant nutrient supply) equations for targeted yield of rice under sodic soils developed by department of Soil Science and Agricultural Chemistry, AICRP-STCRunit, TamilNadu Agricultural University, Coimbatore, TamilNadu, demonstrations based on targeted yield in rice were conducted at farmers’ fields by Krishi Vigyan Kendra, Vamban, Pudhukottai, Tamil Nadu at different locations of sodic soil areas with rice varieties CO43 Sub1 (medium fine grained) and TRY 3 (bold grain) during rabi 2020–2021. The STCR-IPNS technology was used for computation of fertilizer doses based on soil test values and targeted yield of 60 q/ha and compared with farmers’ practice. The demonstrated STCR-IPNS technology was able to increase yield of rice over farmers’ practice under sodic soil to the tune of 41.68 and 38.34 per cent for medium fine and bold rice varieties respectively. Value of net return from demonstrated STCR-IPNS technology was observed to be Rs 42,000 and 44,000 in comparison to farmers’ practice ie Rs 21,000 and Rs 17,500 for medium fine and bold rice varieties respectively. The benefit-costratio of STCR technology with farmers'practice was 2.16 and 2.25 and 1.55 and 1.46 for medium fine and bold rice respectively. The STCR-IPNS technology ie application of fertilizer doses based on initial soil test values with FYM @ 12.5 tonnes/ha along with gypsum application was effective in changing attitude, skill and knowledge of farmers and can be recommended for achieving higher yield (ie up to 6 tonnes/ha), response ratio and BCR for rice on Alathur series (Vertic Ustropept) and allied soil series especially sodic soils of Tamil Nadu. This also improved the relationship between farmers and scientists and built confidence among the farmers. Top Keywords STCR technology, Sodic soil, Targeted yield, Rice, Reclamation. Top |