TY  - JA
AU  - Prasad,B.
AU  - Singh,B.P.
AU  - Singh,K.D.N.
TI  - Effect of long-term use of fertilizers, lime and manure on forms and availability of nitrogen in an acid soil under multiple cropping system
PY  - 1986///
KW  - Acid soils
KW  - Agricultural lime
KW  - Bihar
KW  - Manures
KW  - Multiple cropping
KW  - Nitrogen
KW  - Nutrient availability
KW  - Nutrient uptake
KW  - Potatoes
KW  - Soybeans
KW  - Wheat
KW  - AGROVOC
KW  - Nitrogen fertilizers
N2  - Different forms of soil nitrogen were determined after fifteenth crop in a long-term experiment involving soybean-potato-wheat, receiving fertilizers and manures. Positive and significant correlations between NO3-N and water soluble, exchangeable and fixed NH4+ were obtained. Also, fixed NH4+ was correlated significantly with water soluble and exchangeable NH4+. Total nitrogen uptake byfive crops of soybean, potato and wheat were significantly related to water soluble, exchangeable and fixed NH 4-N, NO3-N and available N. Path analysis also indicated the greater contribution of NO3 and fixed ammonium N to soybean and wheat and water soluble NH4+ and
T2  - Journal of the Indian Society of Soil Science
ER  -