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Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur

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2014 - 201515
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Subject: Soil Science and Agricultural Chemistry × End date: 2017 × Start date: 2014 × Type: Thesis × Thesis Type: M.Sc ×
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Now showing 1 - 9 of 15
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    ThesisItemOpen Access
    Effect of conservation agricultural practices on selected soil physical properties and carbon pools in black soils of cental india
    (JNKVV, 2014) Malviya, Salikram; Mitra, N.G.
    ABSTRACT Conservation agriculture is a way to achieve goals of enhanced productivity and profitability while protecting natural resources and enhancing soil quality. The information on impact of conservation agriculture on soil organic carbon pools, soil microbial biomass carbon and soil physical properties are scanty in the black soils of central India. Keeping this in view, an attempt has been made to study the effect of conservation agriculture under different cropping systems on soil organic carbon, microbial biomass carbon and selected soil physical properties in black soils of central India. Soil samples (surface and subsurface) were collected from experimental field under conservation agriculture experiment for soil analysis after three crop cycle. Results revealed that irrespective of all the depth, soil pH and EC data showed no significant difference under different tillage and cropping systems. The soil moisture content and mean weight diameter (MWD) at surface layer (0-15 cm) was significantly affected by the tillage treatments. Under reduced tillage (RT) practices, soil moisture content and MWD was higher than conventional tillage (CT) with an increase of 3-13 %. However, bulk density (BD) was significantly higher in CT than RT and statistically significant among tillage and cropping system at surface and sub-surface layer. Soil organic carbon (SOC) data revealed that tillage practices were significantly different. The reduced tillage was significantly different from conventional tillage (CT) in 0-15 cm depth, whereas in the lower depths (i.e 15-30 and 30-45 cm) tillage practices did not have significant effect on SOC. However, cropping system did have effect on SOC content. The SMBC values were significantly different under tillage treatments. Among the cropping system studied, soybean+ pigeon pea (2:1), soybean – wheat and soybean + cotton (2:1) cropping systems were significantly different over soybean-fallow system. Whereas, SMBC value were at par in soybean fallow (rotated with maize-gram) and maize-gram cropping systems. Impact of tillage system on SOC was found to significant only at surface layer (0-15 cm) and higher SOC value was observed under reduced tillage system as compared to CT. Among carbon pools studied, very labile, labile and non-labile were found to be significant among tillage system. Reduced tillage practices resulted in increased carbon pools particularly very labile and non-labile pools over CT. However, cropping system does not have any significant effect on SOC and carbon pools at different soil depth at the end of 3rd crop cycle. Yield data indicated that that tillage had no effect on soybean grain equivalent (SGE) after three years of crop cycle. Among the cropping systems studied, maize-gram recorded significantly higher yield (45.70 q ha-1) followed by soybean+ pigeon pea (2:1) (31.62 q ha-1) and soybean-wheat (29.74 q ha-1) cropping system. From the study, it was inferred that though there was a relative improvement of some soil properties like moisture content, organic carbon and pools, and microbial biomass carbon under reduced tillage after three years of crop cycle, however conspicuous/ significant results will be visible in the long term.
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    ThesisItemOpen Access
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    ThesisItemOpen Access
    Effect of zinc levels on yield and quality of soybean and it's residual effect on wheat in a vertisol
    (JNKVV, 2014) Raghuwanshi, Chandrabhan; Kulhare, P.S.
    Thesis Abstract A field experiment entitled “Effect of Zn levels on Yield and Quality of Soybean and its Residual Effect on Wheat in a Vertisol” was conducted during, 2013-14 at experimental station of department of Soil Science and Agricultural Chemistry, Jawaharlal Nehru Krishi Vishwa Vidhyalaya, Jabalpur (M.P.) to assess the effect of Zn levels and their periodicity on yield and quality of soybean-wheat crop. The soybean (JS 97-52) was sown on 5/7/213 @ 100 kg ha-1 with 40 cm row to row distance. The basal dose of 20 N- 80 P2O5 and 40 k2O kg ha-1 was applied at the time of sowing. The Zn levels @ 0, 2.5, 5.0, 7.5, and 10 kg Zn ha-1 were applied at each and alternate year in soybean crop and their residual effect was observed in wheat crop. The soybean was harvested on 30/10/2013. The wheat (GW 273) was sown on 30/11/2013 @ 100 kg ha-1 with 22.5 cm row to row distance. The basal dose of 120 N- 60 P2O5 and 40 K2O kg ha-1 was applied on the time of sowing and remain N was applied in two equal dose at the time of CIR and at flowering stage. The wheat was harvested on 7/4/2014. The effect of increasing Zn levels on Zn content at 45 DAS, 90 DAS and at harvest, yield, uptake and quality of soybean crop and available nutrient and Zn fractions after harvest of soybean were studied. The each year Zn application significantly increased the Zn uptake by seed and available Zn content in soil after harvest of soybean over alternate year Zn application but the difference between the two treatments was found non-significant for other parameter of soybean and wheat. Application of increasing levels of Zn significantly increased the Zn content in soybean at 45 DAS, 90 DAS, in seed and stover, Zn uptake by seed, stover and total Zn uptake, crude protein and oil content and Zn fraction (water soluble, complexed, organic bound, occluded, residual and total) and organic carbon in soil over control. The seed and stover yield of soybean and available N, P, K @ 5 kg ha-1 was found significantly superior to control but higher than that Zn levels were found on par amongst themselves. However, the application of 5 kg Zn was found significantly superior to 2.5 kg Zn for Zn content at 90 DAS, in seed and stover and Zn uptake by stover and total Zn uptake, protein and oil content in soybean and organic carbon content in soil. However, the Zn uptake by stover and total Zn uptake by soybean with 10 kg Zn ha-1 was found significant over 5 kg Zn ha-1. Increasing levels of Zn successively and significantly increased the available Zn content in soil after harvest of soybean. Residual effect of increasing levels of Zn also significantly increased the Zn content in wheat plant at 45, 90 DAS and in wheat grain and straw at harvest, grain and straw yield and their uptake and protein content over control. However, the Zn content with residual effect of 5 kg Zn ha-1 was found significantly superior to 2.5 kg Zn ha-1 at 45 DAS, 90 DAS and Zn content in wheat grain and total Zn uptake by wheat. The wheat grain yield with 5 and 7.5 kg Zn ha-1 successively and significantly increased. The residual effect of increasing levels Zn also successively and significantly increased the available Zn content in soil after harvest of wheat. Each or alternate year Zn application @ 5 kg Zn ha-1 in soybean and its residual effect significantly increased the yield, quality (protein and oil content), Zn content in and uptake by soybean and wheat respectively. The maximum content of water soluble, exchangeable, occluded, residual and total Zn fractions in soil were observed at 5 kg Zn ha-1. While complexed and organic bound Zn fraction was found maximum at 10 kg Zn ha-1. Water soluble, exchangeable, occluded, residual and total Zn content were found highly correlated with yield and Zn content of soybean. While water soluble, exchangeable, complexed, organic bound and occluded Zn fraction were found highly correlated with Zn uptake by soybean as well as yield, Zn content and uptake by wheat.
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    ThesisItemOpen Access
    Effect of soil test based nutrients application on phosphorus content and yield of soybean and phosphorus fractions in soil
    (JNKVV, 2014) Baretha, Dinesh; Rai, Hitendra K.
    ABSTRACT The present investigation is a part of on -going programme under AICRP on STCR. The investigation entitled “Effect of soil test based nutrients application on phosphorus content and yield of soybean and phosphorus fractions in soil” was carried out during Kharif season 2013 taking soybean (var. JS-97-52) as test crop with the following objectives: 1. To study the effect of soil test based nutrient application on growth and yield of soybean. 2. To study the effect of soil test based nutrient application on phosphorus content and uptake by soybean. 3. To study the of soil test based nutrient application on different fraction in soil The experiment was undertaken on Typic Haplustarts soil on the Research Farm of Department of Soil Science and Agricultural Chemistry, JNKVV, Jabalpur situated at 230 13’ N latitude, 790 57’ E longitude and at altitude of 393.0 meter above mean sea level). Five treatments [T1: control, T2 : GRD (20.60.20), T3 = targeted yield of 2.5 t ha-1 (0:27.9:23.4), T4 = targeted yield of 3.0 t ha-1 (25:53.9: 42.9), and T5 = targeted yield of 3.5 t ha-1 (50.9:79.9:62.4)] of nutrients (N, P2O5 and K2O) application were laid with four replications in randomized block design following all the standard recommended agronomic practices other than those under treatments. Experimental results clearly indicated that growth characters (plant height number of leaves, dry weight and number of nodule) of soybean plants were significantly affected by different treatments of nutrients application and T5 treatment showed superiority to other treatments. It was also found that seed and stover yields of soybean were affected significantly due to various treatments. The highest seed (2420 kgha-1) and stover (2112 kgha-1) yields were recorded in T5 and T1 treatments, respectively. It was also found that different treatments of nutrients application did not affected soil properties (pH, EC and OC) significantly, however residual content of available N, P and K were altered significantly. Maximum phosphorus content (2.80, 2.96, 2.98 g kg-1) in plant at different days after sowing (30, 45, 60 DAS), respectively was recorded under T5 [targeted yield of 3.5 t ha-1 (N, P2O5 and K2O - 50.9: 79.9: 62.4)] treatment. While, highest phosphorus content in seed (3.66 g kg-1) and stover (2.45 g kg-1) were also recorded in same treatment. Results of the present study further indicated that different P- fractions were significantly affected by the treatments of nutrients application. Content of Saloid-P was lowest and Ca-P was predominant and the various fractions were present in order of Saloid - P< Occl-P< Al-P
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    ThesisItemOpen Access
    Remediation of agro- contaminants in soil under different plant species
    (JNKVV, 2014) Yadav, Rajesh; Baghel, S.S.
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    ThesisItemOpen Access
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    ThesisItemOpen Access
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    ThesisItemOpen Access
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    ThesisItemOpen Access