PA Panghate, Ommala D Kuchanwar, AR Pimpale, Padmaja H Kausadikar, Kirtimala R Gopal and Ruchika S Nagmote
The field investigation in relation to "Effect of organic inputs on physic-chemical properties of soil under certified organic farms in Nagpur district” was carried out during kharif - rabi season of 2018 – 19 at the certified organic farmer’s fields of Nagpur district. Soil samples of 0-20 cm depth were collected randomly after the harvest of crops from six locations viz
., Selu, Kalmeshwar, Gangner, Saoner, Chacher and Chinchbhavan of Nagpur district were selected. The certified organic farmers applying FYM @ 2.5 to 10 t ha-1
, Ghanjivamrut 500 kg ha-1
and Jivamrut 500 lit ha-1
from last 8 to 18 years for different crops.
The results revealed regarding physical properties of soil that, the value of bulk density of soil varied from 1.21 to 1.60 Mg m-3. Due to long term effect of organic sources i.e. FYM @ 5-10 t ha-1 resulted a decreased in soil bulk density of 1.32 to 1.42 Mg m-3 over inorganic fertilizer. Among the organic farming crops, the value of HC of soil ranged between 0.94 to 1.21 cm hr-1 whereas HC of soil recorded 0.63 to 0.90 cm hr-1 among inorganic farming crops. HC of soil increased numerically due to the application of FYM, jivamrut @ 500 lit. ha-1 and ghanjivamrut @ 500 kg ha-1. The value of water holding capacity varied from 53.40 to 66.52 per cent under the application of organic and inorganic inputs. The application of organic inputs from 8 to 18 years resulted increase the water holdind capacity of soil by 2.87 to 18.72 per cent over the application of inorganic fertilizer alone. Regarding chemical properties of soil the results revealed that soil pH was reduced and electrical conductivity of soil (0.215 to 0.316 dS m-1) remained almost unchanged due to incorporation of organic and inorganic sources. The soil organic varied from 3.92 to 9.89 g kg-1 in the field treated with various organic sources and chemical fertilizers alone and comes under the categories of medium to moderately high. The soil available N content was observed between 188.19 to 420.74 kg ha-1 under the application of organic and inorganic inputs. The application of organic inputs from 8 to 18 years resulted in maximum available N content of soil by 14.61 to 64.57 per cent over the application of inorganic fertilizer alone.The available P of soil were recorded between 12.09 to 25.56 kg ha-1 in the present investigation. The available P was recorded less in the organic field than the fertilizer applied field up to 31.65 per cent. The value of available K found very high in range in the present study. The magnitude of available K ranged from 321.56 to 454.45 kg ha-1 The available sulphur ranged from 10.64 to 15.38 mg kg-1 i.e. marginal to adequate. The use of FYM, manurial liquid and solid organic source was found useful in maintaining the available micro-nutrient status of soil over the continuous use of inorganic fertilizer. The status of DTPA extractable micronutrients Zn, Fe, Mn and Cu (mg kg-1) range from 0.51 to 0.72, 3.57 to 8.71, 3.96 to 7.80 and 2.30 to 4.84, respectively when the use of organic and inorganic sources.
PA Panghate, Ommala D Kuchanwar, AR Pimpale, Padmaja H Kausadikar, Kirtimala R Gopal and Ruchika S Nagmote. Dynamics of organic inputs on Physico-chemical properties of soil under certified organic farms in Nagpur district. J Pharmacogn Phytochem 2020;9(3):1395-1400.