Phosphorus (P) is the most important element after nitrogen but P sorption properties are poorly documented in many soils. In this study, P sorption capacity in relation to incubation period and temperature under various P levels were determined for two different soil series (Rustam and Miani). Phosphorus was added at 5, 10, 25, 50, 100, 250, 500 and 1000 µg g −1 to the soils and incubated for the period of 1, 3, 7, 15, 30 and 60 days at 25 and 35±1°C temperatures. Phosphorus sorption was significantly influenced by the temperature, added P and incubation period. Clay content has major influence on P sorption. Rustum Series adsorbed more P than that of Miani Series. The P sorption was faster at high temperature (35°C). At the end of period in the Rustum Series with added 2.5 and 1000 µg g −1 P level, P sorption were found 0.7 and 943 µg g −1 , respectively, at 25±1°C temperature, whereas at 35±1°C temperature the respective P sorption for same P levels were 1.8 and 987.0 µg g −1 . In the Miani Series at 25±1°C temperature, P sorption was 0.7 and 941 µg g −1 , while at the temperature of 35±1°C, P sorption were 1.0 and 986 µg g −1 soil. Increasing P levels, temperature and incubation, resulted in higher P sorption. Hence, high clay in combination with calcium carbonate contents enhanced P adsorption, while high organic matter and high native soil P resulted in lesser P adsorption.
The present investigation was undertaken with a view to study the labour absorption (both family and hired labour) in principal crops in Semi-Arid and Flood Prone Eastern Plain Region of Rajasthan. The primary data were collected from 200 households of 10 villages during the year 2018-2019. To study the labour absorption in crop production for principal crops the model suggested by Singh, 1996 was used. In semi-arid and flood prone eastern region (Region-III), the average labour absorption in crop production was 48.72 man-days per hectare in selected principal crops i.e., pearl millet, green gram, wheat, rapeseed & mustard and chickpea. The participation of family and hired labour was 31.11 man-days per hectare and 17.61 man-days per hectare in region-III. The wage rate for machine labour was maximum on marginal farms (Rs. 849.86 per hour) while minimum on large farms (Rs. 596.71 per hour).
The present investigation was undertaken with a view to studying the costs and returns structure by the contract and non-contract farmers under contract farming of bottle gourd. Primary data were collected for the agricultural year 2015-16. The cost concepts were used. The results of the study revealed that all types of incomes viz., gross income, family labour income, farm business income and net income were higher on the contract farms than on the non-contract farms. The net income per hectare from bottle gourd was 31.69 per cent higher on the contract farms as compared to the non-contract farms. The total costs were higher on contract farms than on non-contract farms. The net profit was higher on contract farms than on non-contract farms. Returns per rupee were higher on contract farms (` 1.82) than non-contract farms (`1.69).
In the arid western and northern regions of Rajasthan livestock activity is a complementary activity to farming and it provides much needed risk cover in case of crop failure. The present investigation was undertaken to study the labour absorption in different livestock activities in Arid western and northern regions of Rajasthan. The study was conducted based on primary data. The primary data were collected from the 200 households of 10 villages during year of the 2018-2019. The average utilization of human labour in livestock activities was found 54.48 man-days/animal/year in arid western and northern region. The participation of woman labour in all livestock activities was found more than man labour in all herd size group in arid western and northern region. The annual average human labour absorption was maximum in site preparation activity i.e., 28.76 hours/animal/year for male and 101.63 hours/animal/year for female, then other activities in all size of farms.
The present study has been carried out with the objectives of examining growth performance of area and production of rapeseed-mustard along with behavioural change in price and arrivals of rapeseed-mustard in major districts of Rajasthan. The study period from 2010-11 to 2019-20 was selected for growth analysis and January, 2011 to December, 2020 selected for study of price and arrivals of rapeseed-mustard. The results shown that production of rapeseed-mustard was increased at positive rate and area at negative in Alwar and Sawai Madhopur districts. In case of Bharatpur, the area and production of rapeseed-mustard was reported positive growth rate. The instability in annual arrivals of rapeseed-mustard was recorded very high in KUMS, Alwar and KUMS, Dig as compared to KUMS, Nagar and KUMS, Sawai Madhopur. In case of prices, the variability in all selected Krishi Upaj Mandi Samities were record in mid-range.
Highlights:
Highest arrivals instability was reported in Krishi Upaj Mandi Samiti, Alwar
The production of rapeseed-mustard was showed positive growth rate in Rajasthan.
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