PRABHOO SINGH*, K. K. SHARMA, BROOK LEGESE, VIJAY SINGH AND NUGUSE GODANA
Department of Natural Resources Management, College of Agricultural Science, Bule Hora University, Ethiopia
*(e-mail : prabhuag93@gmail.com; Mobile : 07742196724)
(Received : June 25, 2021; Accepted : August 18, 2021)
ABSTRACT
Soil fertility status is the most important aspect of soil physico-chemical properties in relation to its
productivity for sustainable agricultural production. The present investigation was made in 2018-19 to
assess the fertility status of irrigated soils in arid Nagaur district of Rajasthan, India. In general, the
soils were low in organic carbon and available nitrogen in the district. One hundred and fifty composite
surface soil samples at 0-15 cm depth were collected from fields of five tehsils (30 samples each) of
Nagaur district. The mean values of available N, P2O5, K2O and S varied from 168.95, 18.09, 158.50 kg/ha and 12.11 ppm in Nagaur; 158.66, 17.56, 134.00 kg/ha and 11.58 ppm in Jayal; 151.82, 16.92, 140.69 kg/ha and 10.56 ppm in Didwana; 153.77, 18.01, 140.47 kg/ha and 10.73 ppm in Ladnu and 149.90, 16.55, 157.00
kg/ha and 11.01 ppm in Nawa, respectively. The nutrient indices for organic carbon, available nitrogen, phosphorus and potassium were 1.00, 1.00, 1.08 and 1.7, respectively. On the basis of the analytical results and taking development indices as unit, a soil fertility map was prepared. It was recommended that there was a need to supply these deficient nutrients through external organic and inorganic sources for sustaining crop productivity and soil health of five tehsils of Nagaur district of Rajasthan. Soil pH and OC showed positive significant correlation with macronutrients.
Key words : Available nitrogen, available phosphorus, available potassium, organic carbon, sulphur, nutrient indices, soil fertility map