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6. SUMMARY AND CONCLUSIONS

A field experiment was conducted at Main Agricultural Research Station, University of Agricultural Sciences, Dharwad to study the “Nutrient management practices through organics in soybean-wheat cropping system” during kharif and rabi seasons of 2006-07 and the results are summarized in this chapter.

Plant height of soybean was significantly higher with RDF + FYM at all the growth stages of soybean, which was at par with all treatments of organic manures except treatments receiving compost + GLM and fermented manures at 60 DAS and at harvest. Whereas, significantly lower plant height was recorded with fermented organics alone over RDF + FYM.

Number of branches of soybean was significantly higher due to application of RDF + FYM which was at par with organic manures + fermented organics and compost + vermicompost + GLM at 30 DAS, organic manures + fermented organics at 60 DAS and organic manures with panchagavya spray at harvest. Significantly lower number of branches were noticed due to application of fermented organics alone over RDF + FYM.

Significantly, higher number of trifoliate leaves of soybean per plant was recorded with RDF + FYM over rest of the treatments at 30 DAS, whereas at 60 DAS, it was superior over only jeevamrut + beejamrut.

Leaf area index (LAI) of soybean was significantly higher with the application of organic manures + beejamrut + jeevamrut supplemented with panchagavya spray over rest of the treatments at 60 DAS, and significantly lower LAI was noticed with beejamrut + jeevamrut over former treatments, RDF + FYM and compost, compost + vermicompost in combination with GLM + beejamrut + jeevamrut.

Dry matter accumulation in different plant parts of soybean viz., leaf, stem and pods were significantly influenced by organic nutrients. Total dry matter production was significantly higher with RDF + FYM and organic manures in combination with beejamrut + jeevamrut + panchagavya at 60 DAS and at harvest. Whereas, RDF + FYM was significantly superior over rest of the treatments at 30 DAS. Lower TDMP was recorded with beejamrut + jeevamrut.

Yield parameters of soybean like number of pods per plant were significantly higher with RDF + FYM, organic manures in combination with fermented organics and compost + vermicompost + GLM. Test weight per plant did not differed significantly. Whereas yield parameters recorded lower due to application of beejamrut + jeevamrut.

Seed yield of soybean was significantly higher with organic manures + beejamrut + jeevamrut + panchagavya, organic manures + beejamrut + jeevamrut, RDF + FYM and compost + vermicompost + GLM over beejamrut + jeevamrut.

Residual effect of organic nutrient management on wheat after harvest of soybean noticed significant differences among the treatments with respect to yield and yield components. Seed yield and stover yield of wheat was significantly higher with RDF + FYM over fermented organics alone, and rest of the treatments were at par.

Nutrient uptake (N, P and K) by soybean and wheat was significantly higher with application of RDF + FYM which was on par with organic manures viz., compost + GLM, vermicompost + GLM and compost + vermicompost + GLM in combination with beejamrut + jeevamrut + panchagavya treatments. Lower uptake of N, P, K was recorded with beejamrut + jeevamrut treatment.

Soil properties viz., organic carbon content and available soil nutrients viz., N, P2O5 and K2O after harvest of soybean and wheat were significantly higher with treatments receiving organic manures alone or in combination with fermented organics over fermented organics alone.

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