1Project Coordinating Unit (Linseed), C.S. Azad University of Agriculture and Technology, Kanpur-208 002, (Uttar Pradesh), India, Email: sduttdubey@rediffmail.com
2Department of Soil Conservation and Water Management, C.S. Azad University of Agriculture and Technology, Kanpur-208 002, (Uttar Pradesh), India; Email: ud_awasthi@rediffmail.com
Department of Soil Science and Agricultural Chemistry, C.S. Azad University of Agriculture and Technology, Kanpur-208 002, (Uttar Pradesh), India
*Email of corresponding author: amitraj_sac@rediffmail.com
Online published on 15 October, 2015.
Experiment was carried out during 2007–08 with objective to assess the micronutrient status of soil at Kanpur, Uttar Pradesh in four different cropping systems viz. (1) rice-wheat, (2) pigeonpea (early)-wheat, (3) maize-potato-wheat and (4) rice-potato-green manure/black gram. The soil was neutral in reaction, low in organic matter and loamy in texture. Zinc and iron content varied from 0.4–1.24 ppm and 3.43–19.75 ppm which were highest in pigeonpea-wheat and maize-potato-wheat cropping system, respectively. However, available copper and manganese were highest in rice-wheat and rice-potato-green manure/black gram cropping system, respectively with corresponding values of 0.28–4.7 ppm and 0.8–14.62 ppm. Zinc was found below critical level by 72, 36, 48 and 76% in type I, II, III and IV cropping system, respectively; whereas, iron was deficient by 4, 4, 0 and 8% in that order of cropping systems. Copper was not deficient, whereas manganese was deficient by 8 and 4% in type II and III cropping system, respectively. Positive association was observed between micronutrient v/s organic matter and negative association exhibited between micronutrients v/s soil pH and CaCO3.
Cropping system, Micronutrient, Soil
