A pot culture experiment was conducted to identify carbon sequestration potential among the crops such as maize, soybean, sorghum, pearl millet, finger millet and rice through estimating carbon (C) and nitrogen (N) partition in root and shoots. Plant biomass, C and N were measured and C:N, C:C, N:N, C:N ratio were calculated at 30, 50, 75, 90 DAS (days after sowing) and at crop maturity from each crop. Among the crops grown, total dry biomass was decreasing in the order of maize [ pearl millet [ sorghum [ soybean [ rice [ finger millet. The highest plant biomass was recorded in maize crop (15.82 g/ plant at 30 DAS and 44.28 g/plant at 90 DAS). There was a considerable variation observed in N:N, C:C and C:N ratio among the crops as well as at crop growth stages wise. The C:N ratio increased with crop growth from 30 DAS to crop maturity in all the crops. The C:N ratio among the crops at 30 DAS was varied from 27.53 (in soybean) to 69.66 (in rice). By balancing both plant biomass and C:N ratio, it was concluded that carbon sequestration potential of maize, sorghum and pearl millet was higher when compared to rice, finger millet and soybean.

In recent years phosphorus crisis is emerging at global level, every country in the world searching for alternative sources and management options for increasing its supply and use efficiency. Increasing cost of cultivation due to phosphatic fertilizers, attracting our mind towards it. In this experiment it was focused on effect of major kharif crops (maize, soybean, sorghum, pearl millet, finger millet and rice) on phosphatases and dehydrogenase activities in soil at different crop growth periods (30, 50, 75, 90 days after sowing and at crop harvest). Acid phosphatase activity varied crop wise and also at different crop growth periods. The maximum acid phosphatase activities were observed at 75 DAT in rice (0.206 mg PNP/g h), 90 DAS in sorghum (0.194 mg PNP/g h) and pearl millet (0.201 mg PNP/g h), 50 DAS in soybean (0.127 mg PNP/g h), and 30 DAS in maize (0.154 mg PNP/g h) and, 50 DAS as well as 75 DAS in finger millet (0.180 mg PNP/g h), respectively. But alkaline phosphatase activities were maximum at 75 days after sowing in all the crops i.e. sorghum (0.533 mg PNP/g h), soybean (0.465 mg PNP/g h), rice (0.440 mg PNP/g h), maize (0.538 mg PNP/g h), pearl millet (0.546 mg PNP/g h) and finger millet (0.530 mg PNP/g h), respectively. The dehydrogenase activities were also higher in 75 days after sowing in all the crops. These enzyme activities associated with higher availability and uptake of phosphorus.

A field investigation was carried out at experimental farm of Department of Vegetable Science, College of Horticulture, Mandsaur (MP) to estimate the character association for 17 quantitative traits in 20 diverse genotypes of garden pea during the year 2018-19. The correlation studies revealed that pod yield per hectare exhibited highly significant and positive correlation with pod yield (g/plant), pod yield (q/ha), average pod weight (g), total sugar, T.S.S., number of seeds per pod, protein content, number of leaves per plant, number of pods per plant, pod length (cm), shelling percent, Plant height, number of primary branch per plant and negative association with days to first flower appearance, days to 50% flowering and days to first picking and phenotypic correlation coefficient revealed that the pod yield per hectare showed the maximum significant positive correlation with pod yield (g/plant), pod yield (q/ha), average pod weight (g), total sugar, T.S.S., number of seeds per pod, protein content, number of leaves per plant, number of pods per plant, pod length (cm), shelling percent, Plant height and number of primary branch per plant. Negative association showed with days to first flower appearance, days to 50% flowering and days to first picking.

Field investigation was conducted at the Bahadari farm, College of Horticulture, Mandsaur during rabi 2009-10. Eighteen treatment combinations comprising of six varieties viz.,V 1 -Arkel, V 2 -Pusa Pragati, V 3 -Matar Ageta-6, V 4 -Kashi Nandini, V 5 -Kashi Shakti V 6 -Azad Pea-3 and three phosphorus levels P 1 -60kg P 2 O 5 /ha, P 2 -90 kg P 2 O 5 /ha and P 3 -120kg P 2 O 5 /ha were laid out in factorial randomized block design with three replications.Observations were recorded on growth, yield parameters, seed yield and quality. It was concluded that the variety Matar Ageta-6 was superior as indicated through seed yield and quality. Among the phosphorus levels there was increase in growth, yield parameters, yield and seed quality up to P 3 (120 kg P 2 O 5 /ha) level but significant improvement was only up to P 2 (90 kg P 2 O 5 /ha). Economic analysis of different treatments revealed that cost of cultivation was increased with increasing dose of phosphorus application irrespective of variety. Gross return, net profit and cost : benefit ratio were realised highest in variety Matar Ageta-6 with P 3 (120 kg P 2 O 5 / ha) application. It was followed by the same variety under P 2 (90 kg P 2 O 5 /ha) application.However, there was very marginal increase with P 3 (120 kg P 2 O 5 /ha) over P 2 (90 kg P 2 O 5 /ha).