|
PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field experiment entitled Response of chemical fertilizers and micronutrients on yield, yield attributes and economics under maize-wheat cropping system was conducted at Pot house of the Department of Soil Science and Agricultural Chemistry, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur for two consecutive year of 2016-17 in kharif season and2017-18 in rabi seasons in micro plots. The objectives of the experiment were (i) to find out most suitable dose of nutrients for grain and stalk/straw yield of maize and wheat, (ii) to find out benefit cost ratio of maize and wheat crops. The investigation consisted of 9 treatments viz. Control, N (150), N (150) + P (75), N (150)+P (75) +K (75), N (150) +P (75 )+K (75) +S (60), N (150)+P (75)+K (75)+Zn (5), N (150)+P (75) +K (75)+S (60) + Zn (5), N (150)+P (75)+K (75)+S (60)+Zn (5)+Fe (10) and N (150)+P (75)+K(75) +S (60) +Zn (50)+Fe (10) +Az. which were replicated four times in randomised block design (RBD). Maize (cv-Azad Kamal) and wheat (cv. PBW-343) were taken as test crops. The results revealed that the significant improvement in the physical properties (Bulk density, Hydraulic conductivity and Water stable aggregates) and chemical properties like cation exchange capacity and total organic carbon content of the soil were recorded by silty clay loam in texture, neutral in reaction (pH 7.8), medium in organic carbon (0.40%) with 180, 10.11 and 170.0 kg ha-1 of available N, P and K, respectively. Nine treatment combinations were replicated four times in RBD. Surface (0-15cm) and subsurface (15-30cm) soil samples taken after the harvest of wheat (rabi, 2017-18) were analysed for pH, organic carbon, cation exchange capacity, available N, P and K using standard analytical methods. Besides, different fractions of N, P, K, S, Zn and Fe were also determined in the soil samples taken after the wheat harvest (2017-18) and the composite soil samples drawn from adjacent fallow plots. Further increase in grain yield was observed by addition of P. Application of K with N and P fertilizers did not improve the crop yield significantly compared to 150% nitrogen but further addition of S, Zn and Fe to NPK fertilizers improved the grain yield. Application of 150:75:75%NPK and combination with S, Zn, Fe and Az produced the highest average crop yield of maize (33.22 q/ha) and wheat (59.26 q/ha). These treatments also provided significant improvement in yield attributes of major and micronutrients by the crops. Incorporation of the zinc along with 150:75:75%NPK fertilizers gave the maximum benefit-cost ratio and sustained the soil productivity of the maize–wheat cropping system.