[Parameters: Topic='BIOSPHERE', Term='VEGETATION', Variable_Level_1='PHOSPHORUS']
Pantnagar Centre, Uttar Pradesh (All India Coordinated Research Project on Long-Term Fertilizer Experiments)- Soil Organic Matter DatabaseEntry ID: IISS.Pantnagar
Abstract: This project began in 1971 at a tropical site that was once natural
forest. The soil is described as a Beni silty clay loam series of
fine loamy mixed hyperthermic family of Aquic Hapludoll (USDA).
There are three land-uses (rotations): A) Rice, B) Wheat and C) Cowpea
fodder. The cowpea fodder receives no treatments except on one plot
where Rhizobium biofertilizer has been used since 1981. Rice ... and wheat
receive the following treatments (N-P2O5-K20 amounts in kg/ha given):
1) 50% NPK (Rice: 60-30-22.5; Wheat: 60-30-20), 2) 100% NPK (Rice:
120-60-45; Wheat: 120-60-40), 3) 150% NPK (Rice: 150-90-67.5; Wheat:
180-90-60), 4) 100% NPK plus hand weeding (NPK as for 2), 100% NPK
plus Zn (NPK same as 2 plus foliar spray @ 1.14 kgZn/ha to each rice
and wheat crop), 6) 100% NP (Rice and wheat: 120-60-0), 7) 100% N
(Rice and wheat: 120-0-0), 8) 100% NPK plus FYM at 15 t/ha/y (Rice:
120-60-45; Wheat 158-78-37.5 [includes FYM content of N-P2O5-K2O
applied to wheat only), 9) Biofertilizer [from 1981 onwards, before
that as for 2] (Rice: Azolla; Wheat: Azotobacter), 10) 100% NPK
[Sulphur free] (Rice: 120-60-45; Wheat 120-60-40), 11) Control (Rice
and wheat: 0-0-0), 12) Fallow.
The measurements made (data available), methodology, and frequency are
a) Vegetation measurements made and frequency
Total above-ground dry matter: Yearly
Total dry matter offtake: Yearly
Nitrogen content of offtake: Yearly
P,K,S,Zn,Fe,Mn and Cu yearly.
b) Soil sampling
Time zero soil measurements taken.
Details of soil sampling method: Initial composite sample was
collected from 0-20cm with a spade. After the layout of the
experiment, 10-12 cores from each plot were sampled using stainless
steel tube auger for rice and a stainless steel auger for wheat and
cowpea crops in a zig-zag as described by Jackson (1973) Soil Chemical
Analysis. Printice-Hall of India Pvt Ltd., New Delhi,
India. Subsequently, similar composite samples were drawn from each
plot after each crop/annual cropping cycle. Soil is separated into
Details of measuring depths and soil layers: 0-15, 15-30, 30-60 and
60-90 cm after 15 and 20 annual cropping cycles (rice-wheat-cowpea fodder).
c) Soil measurements made and frequency
Total carbon: After each crop/cropping cycle
Method of measuring total carbon: Walkley-Black method (Walkley and
Black , 1934, Soil Sci. 37: 29-38).
Total nitrogen: Measurements made; frequency not specified
Method of measuring total nitrogen: Modified Kjeldahl method as
described in Jackson, M.L. (1973) Soil Chemical
Analysis. Printice-Hall of India Pvt Ltd., New Delhi, India.
Total mineral nitrogen: After each cropping cycle
Method of measuring total mineral nitrogen: Available soil
nitrogen measured as described in Subbiah, B.V. and Asija, G.L. (1956)
A rapid procedurefor the estimation of available N in soils. Current
Science 25: 259-260.
Nitrate nitrogen: Measurements made; frequency not specified.
Method of measuring nitrate nitrogen: Method no specified.
Soil bulk density or weight: Measured but frequency not specified.
Other nutrients: Available N, P, K, S, Zn, Fe, Mn, Cu etc.
Other measurements: Some measurements of soil enzymes have been
This information was compiled for the GCTE-SOMNET Database, Pete
Smith, Pete Falloon, David Powlson, and Jo Smith. Soil Science
Department, IACR-Rothamsted, UK.
Start Date: 1971-01-01
AGRICULTURE > AGRICULTURAL CHEMICALS > FERTILIZERS
AGRICULTURE > AGRICULTURAL PLANT SCIENCE > CROP/PLANT YIELDS
AGRICULTURE > SOILS > CARBON > TOTAL CARBON
AGRICULTURE > SOILS > MICRONUTRIENTS/TRACE ELEMENTS > COPPER
AGRICULTURE > SOILS > MICRONUTRIENTS/TRACE ELEMENTS > IRON
AGRICULTURE > SOILS > MICRONUTRIENTS/TRACE ELEMENTS > MANGANESE
AGRICULTURE > SOILS > MICRONUTRIENTS/TRACE ELEMENTS > ZINC
AGRICULTURE > SOILS > NITROGEN > AVAILABLE NITROGEN
AGRICULTURE > SOILS > NITROGEN > NITRATE
AGRICULTURE > SOILS > NITROGEN > TOTAL MINERAL NITROGEN
AGRICULTURE > SOILS > NITROGEN > TOTAL NITROGEN
AGRICULTURE > SOILS > ORGANIC MATTER
AGRICULTURE > SOILS > PHOSPHORUS > AVAILABLE PHOSPHORUS
AGRICULTURE > SOILS > POTASSIUM > AVAILABLE POTASSIUM
AGRICULTURE > SOILS > SOIL BULK DENSITY
AGRICULTURE > SOILS > SOIL CHEMISTRY > SOIL ENZYMES
AGRICULTURE > SOILS > SULFUR
BIOSPHERE > VEGETATION > BIOMASS
BIOSPHERE > VEGETATION > CARBON
BIOSPHERE > VEGETATION > NITROGEN
BIOSPHERE > VEGETATION > NUTRIENTS
BIOSPHERE > VEGETATION > PHOSPHORUS
LAND SURFACE > SOILS > MICRONUTRIENTS/TRACE ELEMENTS > COPPER
LAND SURFACE > SOILS > MICRONUTRIENTS/TRACE ELEMENTS > IRON
LAND SURFACE > SOILS > MICRONUTRIENTS/TRACE ELEMENTS > MANGANESE
LAND SURFACE > SOILS > MICRONUTRIENTS/TRACE ELEMENTS > ZINC
LAND SURFACE > SOILS > NITROGEN > AVAILABLE NITROGEN
LAND SURFACE > SOILS > NITROGEN > NITRATE
LAND SURFACE > SOILS > NITROGEN > TOTAL MINERAL NITROGEN
LAND SURFACE > SOILS > ORGANIC MATTER
LAND SURFACE > SOILS > PHOSPHORUS > AVAILABLE PHOSPHORUS
LAND SURFACE > SOILS > POTASSIUM > AVAILABLE POTASSIUM
LAND SURFACE > SOILS > SOIL BULK DENSITY
LAND SURFACE > SOILS > SOIL CHEMISTRY > SOIL ENZYMES
LAND SURFACE > SOILS > SULFUR
Quality a) Details of the plots
Width of smallest plot is 12 m
Length of smallest plot is 25 m
b) Details of replication, randomization and controls
There are at least 4 replicates in the experiment. The experiment
has a randomized plot design. Bulk crop rice was grown in 2-3 seasons
... before laying out of the experiment after selection of the site. Based
on the fertility gradient (as far as possible), replications were
assigned in such a way that all the treatments in one replication had
more or less uniform fertility status. The treatments in each
replication were allotted at random from random number tables in
standard statistics textbook.
There are absolute control plots (nil inputs), fallow plot; various
treatments serve as controls for others.
Access Constraints none
Data Set Progress
Role: TECHNICAL CONTACT
Project Coordinator (Long Term Fertilizer Experiments) Indian Institute of Soil Science Nabibagh, Berasia Road
Postal Code: 462038
Role: DIF AUTHOR
Phone: (301) 614-6898
Email: Tyler.B.Stevens at nasa.gov
NASA Goddard Space Flight Center Global Change Master Directory
Province or State: MD
Postal Code: 20771
Nambiar, K.K.M. & Abrol, I.P. (1989) Long-Term Fertilizer Experiments
in India: An Overview. Fert. News 34: 11-20 & 26.
Nambiar, K.K.M. (1991) Long-term fertility effects on wheat
productivity. In: Wheat for Nontraditional warm areas (Ed: D.A.
Sanders), DF, CIMMYT, Mexico: 516-525.
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2000-01-13
Last DIF Revision Date: 2008-01-31
Future DIF Review Date: 2000-12-31