Study of Different Sources of Organic Manures in Comparison with RDF on Growth and Yield of Greengram [Vigna radiata (L.) Wilczek]

The field experiment was conducted to evaluate the different sources of organic manures in comparison with recommended dose fertilizer (RDF) on greengram at South farm, Karunya Institute of Technology and Science, Coimbatore, India. The field experiment was laid out in Randomized Block Design and replicated thrice during kharif and rabi seasons of 2022. The field study comprised of nine treatments, two organic treatments with sole organic manures at 100% on N equivalent basis (vermicompost, farmyard manure) another three treatments consisted of 25%, 50% and 75% combination of each manure. These two organic manures (vermicompost, farmyard manure) were combined with 50% RDF through inorganic fertilizers (12.5:25:12.5 of N, P2O5 and K2O kg ha-1) as a combination of organic and inorganic treatments and one sole 100% inorganic treatment through inorganic fertilizer (25:50:25 of N, P2O5 and K2O kg ha-1). A control treatment was maintained in the layout to compare the performance of all the treatments. The results showed that among the different combinations of organic and inorganic treatments, 100% recommended dose of fertilizer through inorganic (25:50:25 of N, P2O5 and K2O kg ha-1) (T7) fertilizer significantly enhanced the growth and yield of greengram which was closely followed by vermicompost 100% on N equivalent basis.

Physiological studies and nutrient accumulation in mustard varieties in response to fertilizer doses under saline condition in semi-arid region of northwestern Haryana

The present study was conducted to find out the salt tolrant mustard variety for semi-arid region because this region has higher amount of poor quality water for irrigation and nutrient accumulation under saline environment is the most limiting factor in the sustainable crop production. For this four mustard varieties in main plots (Kranti, Giriraj, CS-54, and CS-58) and three fertilizer doses in sub-plots (100, 125 and 150% RDF). During the experimentation, saline water irrigation (7 dS m-1) was applied. The physiological parameters like RWC (75.54 to 80.34 %), total chlorophyll content (1.60 to 1.91 mg g-1 FW), and photosynthetic rate (10.09 to 14.79 µmol CO2 m-2s-1) were significantly increased with increasing dose of fertilizers. Yield stability index was highest with the application of 150% RDF. HI index showed a decline trend with the increasing dose of fertilizers, whereas oil content decreased non-significantly. Irrespective of fertilizer doses, variety CS-58 recorded maximum seed yield (22.89 q ha-1), biological yield (11.22 q ha-1); and other physiological parameters followed by CS-54, Giriraj, and Kranti mustard varieties. Variety CS-58 had the highest nutrient content (N, P, and K) in straw, with reaching to 125% RDF being at par with 150% RDF, followed by CS-54, Giriraj, and Kranti, respectively. The salt ratio (Na+:K+) decreased non-significantly with fertilizer doses, its mean value was however lowest in CS-58.