PJB-2024-542
Studies on the effect of amendments with inorganic nutrients on growth, yield, quality of groundnut (Arachis hypogaea L.) and soil fertility of Red sand dune of southern Tamil Nadu
M. Paramasivan
Abstract
The experiment was conducted during the Kharif-winter seasons of 2022-2024 at Sattankulam taluk, Thoothukudi district, Tamil Nadu. The Theri land (red sand dunes) more in Tirunelveli and Thoothukudi districts of Tamil Nadu, located (77o 49’ 44” to 78o 28’ 22” E and from 8o 15’13” to 9o 11’ 0” N) to an extent of 20,171 ha. The sand dune was isomegathermic and ustic regime from geogenic sand deposit under a semi arid climate. The present investigation was carried out to study the effect of amendments with recommended dose of fertilizers on growth, yield of groundnut variety TMV (Gn13) and physico-chemical properties of Theri soil (red sand dunes). The experiment was laid out in Randomized Block Design (RBD). Seven treatments replicated thrice consisted of different amendments with recommended dose of fertilizers (25:50:75 NPK kg /ha). The result revealed that application of recommended dose of fertilizer with tank silt @ 100 t/ha and fly ash @ 20 t/ha (T7) increased growth attributes viz., highest plant height (55.3 cm), number of branches (7.6), number of pods plant-1 and yield attributes that led to significantly higher productivity (2530 and 6490 kg ha-1 of mean pod and haulm yield). The nutrient uptake of groundnut besides enriched soil available nutrients after harvest of groundnut. Due to the cheap cost of amendments, that treatment also recorded the highest mean net returns (70,700 ha-1) and B: C ratio (2.52).
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