Search

Indiscriminate use of inorganic fertilizers has bought threat to soil health in respect to physical, chemical and biological properties of soil. Therefore, it is necessary to minimize the usage of inorganic fertilizers by substituting with organics. It is well established fact that the improvement in quality and productivity of the crops could be made possible with combined application of organic sources and balanced chemical fertilizers. Therefore, a field experiment was conducted during rabi 2021-22 at College of Agriculture, UAS, Raichur to study the effect of organic sources and nutrient levels on growth, yield and economics of safflower (Carthamus tinctorius L.). Eighteen treatment combinations were evaluated which consisted of three organic sources and six nutrient levels. The experiment was laid out in Factorial RBD design with three replications. The results indicated that among organic sources, application of FYM @ 5 t /ha recorded significantly higher growth parameters viz., plant height (85.95 cm), total dry matter accumulation (121.59 g/plant), seed yield (1467 kg/ha) and stalk yield (2216 kg /ha). Further this treatment recorded higher gross returns (Rs. 80,699/ha) and net returns (Rs. 51247/ha) compared to other treatment. Among the different nutrient levels, SSNM (STCR equation) + micronutrients Zn @ 25 kg/ha + S @ 10 kg/ha showed significant effect on growth parameters and seed yield (1508 kg/ha) as compared to other treatment. Moreover, the combination registered higher gross returns (Rs. 82,964/ha) and net returns (Rs. 54,540/ha) compared to other nutrient levels. [ABSTRACT FROM AUTHOR]

System of Rice Intensification (SRI) was evaluated for the variety Hardinath-1 under nutrient omission treatment (-N, -P, -K, -Zn, -B and +All) through field experiment conducted in randomized complete block design (RCBD) with six treatments and four replications during spring season of 2018 at agriculture field of Sailaja Acharya Memorial Polytechnic, Siswani Jahada, Morang. The highest grain (4.62 t/ha) and straw yields (7.75 t/ha) were obtained from the fully fertilized plot (i. e.+All treatments) which might be due to application of all of the major nutrients in sufficient amount (i. e. 150 : 45 : 45 : 20 : 5 N : P : K : Zn : B kg/ha) along with following SRI principles. Omitting the major nutrients showed significantly lesser growth and yield parameters of rice. The P omitted treatment showed significantly higher sterility percentage (23.74) as P had major role on grain filling and development. The nutrients omission treatment also produced significant effect on plant uptake of N, P, K, Zn and B. Significantly higher uptake of N (76.73 kg/ha), P (38.28 kg/ha), K (52.41 kg/ha), Zn (0.086 kg/ha) and B (0.022 kg/ha) was obtained from fully fertilized plot. Based on plant uptake of nutrient on omission plot, native N, P, K, Zn and B supplying capacity of the soil at research plot was found to be 23.51, 25.94, 37.59, 0.075 and 0.019 kg/ha, respectively. The recovery efficiency of applied N, P, K, Zn and B was found to be 35.48, 5.7, 32.93, 0.06 and 0.06%, respectively. Owing to native nutrient supplying capacity of the soil at the research site, N, P, K, Zn and B required to obtain the target yield of 5 t/ha was found 139.5 kg N/ha, 45.22 kg P/ha, 50.8 kg K/ha, 12.1 kg Zn/ha and 2.6 kg B/ha, respectively. [ABSTRACT FROM AUTHOR]