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FERTILIZER PRESCRIPTION EQUATIONS FOR DESIRED YIELD TARGETS OF CAULIFLOWER UNDER INTEGRATED PLANT NUTRIENT SYSTEM BASED ON TARGETED YIELD MODEL

V. Kasthuri Thilagam, R. Natesan

Affiliations

¹Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore-641 003, India.

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Cite article:- Thilagam Kasthuri V., Natesan R. (2025). FERTILIZER PRESCRIPTION EQUATIONS FOR DESIRED YIELD TARGETS OF CAULIFLOWER UNDER INTEGRATED PLANT NUTRIENT SYSTEM BASED ON TARGETED YIELD MODEL. Agricultural Science Digest. 29(4): 250-253. doi: .

ABSTRACT

The Soil Test Crop Response study (STCR) was conducted for cauliflower under IPNS on
Inceptisols (Typic Ustropept) in Coimbatore district of Tamil Nadu. In order to develop a scientific
base for prescribing fertilizer recommendations for cauliflower, two field experiments were carried
out with sorghum as gradient crop and cauliflower as test crop. From the soil test and crop
response data, the basic parameters were computed and the fertilizer prescription equations for
recommending fertilizer doses were developed for cauliflower. The fertilizer estimates under IPNS
clearly indicated better utilization of added fertilizer nutrients by recording of high response
ratio. Since the conjoint application of organics with fertilizers resulted in saving of 35, 25 and
28 kg ha-1 of N, P2O5 and K2O respectively. Further inclusion of bio-fertilizer viz., Azospirillum @
2 kg ha-1 resulted in the saving of 10 kg ha-1 of fertilizer N.

KEYWORDS

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