Journal of Applied and Natural Science 6 (2): 552-569 (2014)
Impact of post biomethanated spentwash on soil properties, nutrient uptake
and yield of soybean – wheat cropping sequence.
B. M. Kamble1* and A. N. Deshpande
Agricultural Research Station, Kasabe Digraj, Sangli- 416 305 (Maharashtra), INDIA
1Department of Soil Science and Agricultural Chemistry, Mahatma Phule Agricultural University, Rahuri, Ahemadnagar
*Corresponding author: E-mail: email@example.com
Abstract : A field experiment was conducted on Sawargaon series of isohyperthermic family of Vertic haplustepts to
study the effect of application of primary treated biomethanated spentwash (PBSW) through irrigation on soil
properties, nutrient uptake and yield of soybean – wheat cropping sequence. The bulk density and hydraulic
conductivity of soil were improved in 100% recommended dose (RD) of N through PBSW with and without P chemical
fertilizer at soil depths of 0-15 and 15-30 cm. The lowest soil pH, calcium carbonate and highest electrical conductivity, organic
carbon, available K, exchangeable sodium (Na), exchangeable sodium percentage (ESP), cation exchange capacity
(CEC), sodium adsorption ratio (SAR) and pooled bacterial, fungal and actinomycetes populations in surface (0-15
cm) soil depth were observed in 100% RD of N through PBSW + with and without P chemical fertilizer at all three
soil depths (0-15, 15-30 and 30-60 cm) over the other treatments. The highest pooled available soil P was recorded
in 50% RD of N through PBSW application through irrigation and remaining N and P through chemical fertilizers in
all three soil depths. The significantly highest total NPK uptake by cropping sequence and highest mean
Benefit : Cost (B:C) ratio of soybean and wheat was recorded in 25 % RD of N through PBSW + remaining N and P
through chemical fertilizers over the rest of the treatments. The 25 % N-recommended dose of soybean and wheat
crop can be replaced by application of PBSW through irrigation in sequence without disturbing soils by salt load..
Keywords : Economics, Effluent, Soybean-wheat sequence, Soil properties.