trends and changes in physico-chemical properties of soil in maize-wheat
cropping system under integrated nutrient management
Hashim1*, S. Dhar2, A.K. Vyas3 and C.B.
Agronomy, ICAR- Indian Agricultural Research Institute, Regional Station,
Pusa? Bihar-848 125, India.
Agronomy, ICAR- Indian Agricultural Research Institute, New Delhi, India-110
Management, ICAR, Krishi Anushandhan Bhawan-II, New Delhi-110 012, India
Author E-mail: email@example.com
Maize-wheat cropping system,
Paper received : 07.01.2016
Revised received : 02.05.2016
Re-revised received :
Accepted : 24.12.2016
Aim: Integrated use of
organic and inorganic fertilizers has better effects on crop growth and yield
components of crop as well as soil health than alone. The main objective of
the study was to find out the impact of integrated nutrient management on
yield and soil health in maize-wheat cropping system.
maize crop was harvested when cob sheath turned brownish and grains became
hard and grains were separated from cobs by hand shelling. When wheat crop
matured and dry plants from net plot area were harvested and threshing was
done by using wheat thresher and expressed as t ha-1. The soil
samples were collected from different plots of the experimental field and
were analysed for physical (bulk density, hydraulic conductivity) and
chemical (organic carbon, available N, P and K) properties. Infiltration rate
was measured at the experimental field with the help of double ring
of NPK fertilizer along with organic manure and biofertilizers improved yield
and increased organic carbon content, available N, P, K and infiltration rate
and hydraulic conductivity of the soil while reducing bulk density.
Application of 50% recommended dose of fertilizer + 50% recommended dose of
nitrogen produced significantly higher maize grain yield and significantly
higher wheat grain yields were recorded with the application of 100%
recommended dose of fertilizer over control. Lowest bulk density, highest
hydraulic conductivity and infiltration rate were recorded with the
application of 37.5% recommended dose of fertilizer + 37.5% recommended dose
of nitrogen + biofertilizer to wheat. Application of 50% recommended dose of
fertilizer + 50% recommended dose of nitrogen to maize and application of
37.5% recommended dose of fertilizer + 37.5% recommended dose of nitrogen +
bio fertilizer to wheat resulted in increased available N by 10.2, 19.6% and
15.5, 26.2%, available P by 13.7, 20.4% and 17.1, 33.2%, available K by 5.1,
7.6% and 6.4, 10.7% and organic carbon by 3.1, 7.3% and 4.3, 12.5% over
control during 2011 and 2012, respectively. ??
yield, soil physical and chemical properties was found to be affected by the
integrated nutrient management. It can be concluded that integrated use of
crop residue mixed farmyard manure and inorganic sources of nutrients along
with biofertilizers proved better nutrient management option for higher
yield, soil health and net returns from maize-wheat cropping system.