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Birsa Agricultural University, Ranchi

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Subject: Soil Science and Agriculture Chemistry × Author: KHUSHBOO JYOTSNA BAXLA × Start date: 2013 ×
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    ThesisItemOpen Access
    IMPACT OF CROP RESIDUE INCORPORATION IN COMBINATION WITH INORGANIC FERTILIZER ON SOIL PRODUCTIVITY AND PROFITABILITY OF LINSEED
    (Birsa Agricultural University, Ranchi, 2023) KHUSHBOO JYOTSNA BAXLA; Sasihi Bhusan Kumar
    A field experiment entitled ‘Impact of crop residue incorporation in combination with inorganic fertilizer on soil productivity and profitability of linseed’ was conducted during Rabi 2021-22, at Research Farm of Department of Soil Science and Agricultural Chemistry, Ranchi, Jharkhand from the project ‘Recycling of crop waste’ which was conducted since 2016-17 at present location. The experiment consists of 8 treatments and 3 replications in a Randomized Block Design (RBD). Plot size was 18 m2 with 30 cm row spacing. The selected treatments were T1- Control, T2- Crop residue, T3- 50% NPK + Crop residue, T4- 75% NPK + Crop residue, T5- 100% NPK + Crop residue, T6- 50% NPK, T7- 75% NPK, T8- 100% NPK. 50%, 75% and 100% NPK was met by application of Urea, SSP & MOP. The crop grown was linseed (Divya variety), Seed rate was 25 kg ha-1, maturity of crop is 128-130 days. Its average yield is 15 q ha-1. Surface soil (0-15 cm) samples were collected at 30 DAS, 60 DAS, 90 DAS, 120 DAS and at harvest. Soil sample were air dried under aerated shade condition and analyzed for soil reaction (pH), electrical conductivity (EC), organic carbon (OC), available N, available P and available K. The influence of crop residue on crop yield and yield attributing characters was recorded at harvest and economics of linseed was calculated. The results revealed that different treatments of NPK with crop residue incorporation and only NPK application (50%, 75% & 100%) did not show any significant effect on soil reaction and electrical conductivity. Organic carbon (4.56 g kg-1), available nitrogen (225.21 kg ha-1), available phosphorus (42.92 kg ha-1) and available potassium (198.81 kg ha-1) content of soil after harvest of linseed crop recorded significantly higher in the treatment (T5) where 100 per cent NPK along with crop residue was applied. It might be due to incorporation of crop residue in the plots. Those treatments (mainly T2, T3, T4 and T5) where crop residue was applied, soil nutrient status increased throughout from 30 DAS up to harvest stage whereas trend was found reverse, means decreasing trend in case of RDF treated plots. The texture of soil was calculated and falls in sandy clay loam texture while matched from soil textural triangle diagram. The bulk density of soil was significant in T2, T3, T4. This might be due to returning the crop residue in soil. The effect of crop residue incorporation direct or in the combination with RDF in soil was found non-significant in particle density, porosity and water holding capacity. The Highest productivity was recorded in the treatment T5- 100% NPK + Crop residue. Grain Yield of linseed was recorded maximum 17.78 q ha-1 in the treatment T5 and least 6.21 q ha-1 in the control treatment (T1). The effect of crop residue incorporation on grain and straw yield and other yield attributes were also observed and found that plant population was higher in treatment T5 with 100% NPK + CR. Similarly, the number of primary branches (5.34), secondary branches (19.72), capsule/plant (27.54), seed/capsule (6.85) and 1000 grain weight (7.18 g) were observed significantly higher in the treatment T5 having 100% NPK + CR. The harvest index of crop residue incorporated treatment T5 was 33.32% with grain yield (17.78 q ha-1), straw yield was (35.57 q ha-1), and 32.25% harvest index was recorded with grain yield (16.07 q ha-1) and straw yield (35.48 q ha-1) was recorded in treatment T3 where only 50% RDF was provided along with crop residue. Net return and B:C ratio of T5 and T3 was (80697 ₹ ha-1, 56432 ₹ ha-1) and (2.3, 2.2) respectively. On the basis of one year of experimentation, it may be concluded that application of 50% NPK with crop residue produce higher grain yield, net return and B:C ratio which was at par with 100% NPK with crop residue incorporation. Thus, it was found most suitable combination for obtaining higher net return and benefit cost ratio making it economically feasible for farmers of Jharkhand. It reduces 50 % of the RDF of fertilizer cost with better outcome of yield.