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A field investigation entitled “Effect of pre and post emergence herbicides on nutrients uptake and soil microflora in maize (Zea mays L.)” was carried out at AICRP on weed management field of Agronomy Department, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola during Kharif season of the year 2018-19 with an objective to study the effect of herbicides on nutrient uptake and soil microflora in maize. The experiment was laid out in randomized block design with twelve treatment replicated thrice. The soil of experimental field characterized as clay loam in texture, having slightly alkaline pH (7.5), moderate organic carbon status (5.38%), low nitrogen content (219.33 kg ha -1 ), medium available phosphorus content (15.30 kg ha -1 ) and high available potassium (340.67 kg ha -1 ). Maize (Pioneer hybrid 3396) was sown on 25 th June 2018 at 60×20 cm spacing with 120:60:30 NPK kg ha -1 . The results revealed that there was a significant differences in uptake of major nutrients N, P and K by crop and maximum total nitrogen, phosphorus and potassium uptake of 268.11, 39.76 and 148.69 kg ha -1 respectively was recorded in weed free treatment followed by atrazine 0.50kg/ha fb tembotrione 0.120 kg/ha (264.40, 39.14 and 146.17 NPK kg ha -1 ) and treatment Atrazine 0.50 kg/ha fb 2,4-D sodium salt @ 0.5kg/ha .As regards to uptake by weed, weedy check treatment showed maximum uptake (36.49, 4.88, 24.57 NPK kg ha -1 ) of major nutrients than all other treatments of chemical herbicides and weed free plots. Effect of herbicides after spraying significantly influenced the population of soil microorganisms viz., bacteria, fungi and actinomycetes as compared to their population before herbicide application. But at the time of harvest of the crop the microbial population with all the treatments attained the equal level.

Effect of Pre and Post Emergence Herbicides on Nutrients Uptake and Soil Microflora in Maize