IMPACT OF LONG TERM ORGANIC SOURCES ON PHYSICAL AND CHEMICAL STATUS OF SOILS UNDER VEGETABLES IN NAGPUR DISTRICT.
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Date
2019-08-08
Authors
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Publisher
Dr. Punjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra.
Abstract
The field investigation in relation to "Impact of long term organic sources on physical and chemical status of soils under vegetables in Nagpur district” was carried out during kharif - rabi season of 2018 - 19 at the certified organic farmer’s fields of Nagpur district to assess the physic-chemical soil properties and yield of different crops as influenced by various organic resources. Soil samples of 0-15 and 15-30 cm depth were collected randomly after the harvest of crops from different locations of Nagpur district were selected for recording various observations and analytical work. Yield of vegetable crops was noted from farmer’s field. The certified organic farmers are continuously applying FYM @ 10 t ha-1, Ghanjivamrit 500 kg ha-1 and Jivamrit 500 lit. ha-1 from last 11 to 18 years for different crops. The results revealed that soil pH was reduced at surface level due to continuous application of various organic sources. However, electrical conductivity of soil (0.204 to 0.408 dS m-1) remained almost unchanged due to incorporation of organic and inorganic sources. The application of organic inputs has increased organic carbon by 16.64 to 27.18 per cent at different locations over chemical fertilizer alone. The application of FYM @ 10 t ha-1 has continuously increased the available N by 19.24 per cent over the use of inorganic fertilizers alone. The available P content of soil after harvesting of crops varied from 11.61 to 24.89 kg ha-1 and resulted under very low to low in range categories. The application of organic fertilizer (FYM @ 10 t ha-1) recorded an increased in available K content in soil by 5.60 and 4.85 per cent in surface and subsurface soil over the inorganic fertilizers alone. Due to addition of organic sources may be ascribed to the reduction of K fixation and released of K due to interaction of organic material with clays besides the direct K addition in the soil. The variation in available sulphur (8.89 to 18.64 mg kg-1) was observed and it found low to medium amount in all locations. The use of FYM, manurial liquid and combined with organic sources was found useful in maintaining the available micro-nutrient status of soil over the continuous use of inorganic fertilizer alone. The use of organic sources has decreased the bulk density over inorganic fertilizer alone and also has increased the hydraulic conductivity of soil. The value of HC increases ascribed to better aggregation and increased infiltration rate by addition of FYM which directly influenced hydraulic conductivity of soil. The application of FYM @ 10 t ha-1has increased the WHC to the tune of 6.97 per cent at subsurface level over the application of inorganic fertilizer alone. The highest (1.15 cm hr-1) value of the infiltration rate was recorded with plot treated with FYM @ 10 t ha-1 this was due to treatment applied higher doses of FYM might be due to improvement of soil structure and soil aggregates thereby increased macro porosity which resulted in reducing the bulk density of the soil. Higher macro porosity resulted in higher infiltration as the water moves through macro pores during infiltration. The range of mean weight diameter varied from 0.97 to 1.25 mm. Maximum yield of brinjal (310.6 q ha-1) and okra (93.5 q ha-1) was obtained with FYM 10 t ha-1as compared to application of other nutrient sources whereas fenugreek (64.9 q ha-1) and spinach (72.0 q ha-1) resulted maximum in inorganic fertilizer. From the study it can be concluded that, the application of organic inputs improve the physical, chemical and fertility status of soil.
Description
It shows the effect of different organic sources on soil’s physical and chemical properties and it also shows the correlation between soil properties and yield of vegetables crop.
Keywords
Soil Science and microbiology, Soil Sciences, Organic Soils.
Citation
PATEL, KU. BABITA. (2019). Impact of long term organic sources on physical and chemical status of soils under vegetables in Nagpur district. Department of soil science and agricultural chemistry, Nagpur. Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Sc. 2019. Print. xii, 94p. (unpublished).