RESPONSE OF SESAMUM TO DIFFERENT LEVELS OF NITROGEN AND PHOSPHORUS IN THE SUMMER SEASON
KrishiKosh
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Title |
RESPONSE OF SESAMUM TO DIFFERENT LEVELS OF NITROGEN AND PHOSPHORUS IN THE SUMMER SEASON
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Creator |
NAGANJALI, K
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Contributor |
RADHA KRISHNA MURTHY, V
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Subject |
RESPONSE, SESAMUM, DIFFERENT, LEVELS, NITROGEN, PHOSPHORUS, SUMMER, SEASON
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Description |
A field experiment was conducted on red sandy soil at the Students’ Farm, College of Agriculture, Rajendranagar, Hyderabad during summer, 2006. It had a low level of 238 kg N/ha, but rich in phosphorus and potassium having 78.5 kg P2O5 and 313.38 kg K2O/ha. Sesamum variety ‘Swetha’ was tested with a combination of four levels of 0, 50, 100, 150 kg N/ha with four levels of 0, 30, 60, 90 kg P2O5/ha. These were replicated thrice. The layout was a Randomised Block Design. The data was analysed following factorial approach. The application of nitrogen did not increase the plant height and number of leaves/plant of sesamum. The number of branches/plant increased significantly at 60, 75 days after sowing and at harvest by the application of 50 kg N/ha. The application of phosphorus did not improve these vegetative characters at any stage. The crop fertilized with 100 kg N/ha accumulated significantly more quantity of dry matter per plant from 45 days after sowing until harvest. But, phosphorus on the other hand deterred the dry matter accumulation compared to control. The crop removed more nitrogen with increasing levels of this nutrient upto 150 kg/ha at harvest. The crop fertilized with 50 kg P2O5/ha removed significantly more quantity of P at 60 days after sowing. It removed significantly larger quantities of K at 60 and 75 days after sowing and at harvest in response to the application of 100 kg N/ha. The removal of N, P or K was not influenced by the application of phosphorus. The crop fertilized with 150 kg N/ha produced maximum number of capsules per plant at 60 days after sowing. Later, at 75 days after sowing and at harvest, the number of capsules were at par by fertilizing it with 50, 100 or 150 kg N/ha and significantly more than in control. Maximum number of seeds per capsule were realized by the application of 100 kg N/ha. The test weight and seed yield/plant increased even with a low dose of 50 kg N/ha. The effect of phosphorus was inconsistent. Sesamum produced a mean seed yield of 235 kg and stover yield of 1118 kg/ha in control. Significantly more seed yield of 332 kg and stover yield of 1532 kg/ha was obtained by the application of 50 kg N/ha. The production was on par at high levels of 100 and 150 kg N/ha. Phosphorus had no effect. A quadratic response function: Y = 233.9766 + 2.6943 N – 0.0136 N2 …… R2 = 0.68 was best filled to characterize yield response to nitrogen. The optimum economic dose was 79 kg N to realize seed yield of 361 kg/ha with a net profit of Rs 697/ha. The maximum dose was 98 kg N for estimated maximum production of 367 kg/ha. Graphs indicating response surfaces for levels of N and P on seed yield and contours indicating the quantity of these fertilizers for different yield levels are also displayed. The crop grown without the application of nitrogen had 41.39% oil in the seed and the oil yield was 102.7 kg/ha. Application of 50 kg N increased the oil content to 43.04 per cent and the oil yield to 142.9 kg/ha. Application of 30 kg P2O5/ha also increased the oil content significantly. The protein content of seed was not influenced by N or P. Maximum net returns of Rs 2,351/ha were realized from the crop fertilized with 100 kg N/ha compared to Rs 751/ha from the unfertilized control. But, maximum profit of Rs 0.53 per rupee investment was realized by the application of 50 kg N/ha. The application of phosphorus was uneconomical. The soil nutrient budget revealed that the balance of N and P was more after the harvest of the crop grown without the addition of fertilizers compared to the initial soil test values. Fertilizer additions further improved the soil fertility. The available K was also more than the initial level. |
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Date |
2016-08-17T11:00:46Z
2016-08-17T11:00:46Z 2006 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/72692
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Language |
en
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Relation |
D7852;
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Format |
application/pdf
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Publisher |
ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD
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