TY  - JOUR
AV  - restricted
A1  - Velmurugan, R
A1  - Mahendran, P P
A1  - Wani, S P
A1  - Uttam, K
A1  - Prabhavathi, M
TI  - Molybdenum status and critical limit in the soil for green gram (Vigna radiata) growing in Madurai and Sivagangai districts of Tamil Nadu, India
UR  - http://dx.doi.org/10.1080/00380768.2012.763021
JF  - Soil Science and Plant Nutrition
SN  - 1747-0765
PB  - Taylor & Francis
N1  - We are grateful to ICAR for financial support
for conducting the research. We are thankful to
Dr K.L. Sahrawat for help in revising the manuscript
and Mr. Irshad Ahmed (ICRISAT) for his help in
preparation of the maps.
N2  - A survey was undertaken during 2008 to determine molybdenum (Mo) status of soils and to establish critical limits in soils of Madurai and Sivagangai districts of Tamil Nadu. A total of 202 surface soil samples were collected from 16 soil series of the study areas based on their percent coverage. The samples were analyzed for extractable or available Mo. Extractable Mo varied from 0.028 to 0.661?mg?kg?1 and 0.035 to 0.961?mg?kg?1 at Madurai and Sivagangai districts, respectively. Based on the results of a pot culture experiment, the critical limit of available Mo was determined to be 0.043?mg?kg?1 for green gram [Vigna radiata (L.) Wilczek] (Var; CO 6) in both the districts. Based on this critical limit, we classified the soils into three categories: (1) low: <0.043?mg?kg?1 (2) medium: 0.043?0.082?mg?kg?1 (3) high: >0.082?mg?kg?1. Green gram responded highly to Mo application in soils below the critical limit whereas soils with Mo greater than 0.082?mg?kg?1 did not respond. Among rates of Mo application, 0.075?mg?kg?1 showed better yield than others. Overall, 3?41% and 7?46% of total area in Madurai and Sivagangai districts were in the low to medium Mo status, respectively. The application of 0.075?mg of Mo?kg?1 or 0.4?kg?ha?1 as sodium molybdate was sufficient to optimize green gram yield in the major soil series of the districts. These results will be useful in decision-making to apply Mo for improving green gram yields in the two districts studied.
Y1  - 2013///
SP  - 229
ID  - icrisat7451
EP  - 236
VL  - 59
IS  - 2
ER  -