An Asian Journal of Soil Science

N. S. Wagh ¹, D. K. Mandal ², N. S. Sadanshiv ¹

Affiliations
1 Department of Soil Science and Agricultural Chemistry, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola (M.S.), IN
2 Division of Land Use Planning, National Bureau of Soil Survey and Land Use Planning, Nagpur (M.S.), IN

Abstract

The present investigation was carried out to study the status of major micronutrients in sunflower growing soils of Nagpur district during the year 2009-2010. For this purpose in 6 profile 32 soil samples were collected from two tehsils (2 villages from each tehsil) of sunflower growing soils of Nagpur district. From each village soil sample was collected and subjected to laboratory for analyzing for some chemical properties and status of available micronutrients viz., Zn, Fe, Mn and Cu. The correlation co-efficient between chemical properties and available nutrients were worked out. The study revealed that the soils are neutral to alkaline in reaction, safe in limit of electrical conductivity low to high in content of organic carbon and noncalcareous to calcareous in nature. The soil samples were deficient in available Zn, medium to sufficient in available Mn and sufficient in available Fe and Cu. The data showed that available Zn had significant negative relationship with pH (-0.125^*) and CaCO₃ (-0.97^*) and significant positive with EC (0.149^**). Available Fe had significant and positive correlation with EC (0.135^**) and O.C. (0.106^*) and significant negative with CaCO₃ (-0.141^*). Available Mn had negative and significant correlation with EC (-0.130^**) while Cu had positive significant relation with EC (0.101^*) and O.C. (0.170^**).

Keywords

Available Zn, Fe, Mn, Cu, Soil.

Full Text

     

N. S. Wagh ¹, D. K. Mandal ², A. S. Gajare ¹, N. S. Sadanshiv ¹

Affiliations
1 Department of Soil Science and Agricultural Chemistry, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola (M.S.), IN
2 National Bureau of Soil Survey and Land Use Planning (NBSS & LUP), Nagpur (M.S.), IN

Abstract

The sunflower growing soils of eastern Vidarbha region have been investigated for assessing the agro environmental suitability. Six pedons from high intensity area of Bhiwapur and Umred of Nagpur district were selected for study. Crop yield data were collected during field survey and other physical and chemical properties were studied in the laboratory and yields were correlated with soil properties. The investigation revealed that high intensity sunflower growing soils belonged to Typic Haplusterts, alkaline in reaction (pH 8.2 to 8.7) and low to medium in organic carbon content (0.24 to 0.79 %) and high cation exchange capacity (47.91 to 58.71 %), calcium carbonate were < 5 per cent, Ca : Mg ratio varied from 1.8 to 2.6 indicating moderate drainability and base saturation (85 to 89 %). Among the DTPA- extractable micronutrients, zinc was low while the soils were medium to high in manganese and iron and low to high in copper content. The sunflower yield when correlated with agro edaphic parameters it was found that rainfall and major soil physical and chemical characteristics influenced the crop yield. The stepwise regression analysis of sunflower yield with agroenvironment properties reveal that Typic Haplusterts distributed over four villages of Bhiwapur and Umred tahsils of Nagpur district that pH, Ca, Na, sum of cations, CEC, ESP, Mn, sand, clay and water retention at 1500 kPa had positive correlation. The high correlation co-efficient obtained with water retention at 33 kPa (0.91), post Kharif rainfall (0.90), clay (0.87) and water retention at 1500 kPa (0.72) indicating yield influencing factors.

Keywords

Shrink-Swell Soils, Oilseed, Vidarbha.

Full Text