Effect of Methods and Rates of Lime Application and Different Phosphorus Levels on Growth and Yield of Soyabean (Glycine max (L.) Merrill
Effect of Methods and Rates of Lime Application and Different Phosphorus Levels on Growth and Yield of Soyabean (Glycine max (L.) Merrill
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Date
1997-11
Authors
Adesoji, Aderemi Gabriel
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Abstract
A field experiment was conducted at the Institute for
Agricultural Research (IAR) Farm, Ahmadu Bello University, Samaru
Zaria, during the 1995 wet season to study the effect of methods
and rates of lime application and different phosphorus levels on
the growth and yield of soyabean (Glycine max (L.) Merrill). The
treatments comprised of two methods of lime application
(broadcasting and banding) and three levels each of lime (0,500
and 1000 kg lime/ha) and phosphorus (0, 20 and 40 kg P/ha).
Band method of lime application significantly increased leaf
area index, number of primary branches, number of nodules, and Ca
concentration in soyabean shoot while broadcast method
significantly increased N concentration in soyabean shoot, number
of pods per plant, pod yield per plant, total dry matter per
plant, total dry matter per hectare and grain yield per hectare.
However, the two methods were not significantly different on
number of leaves, leaf dry weight, stem dry weight, nodule dry
weight, plant height, number of days to 50% flowering, number of
days to physiological maturity,100-seed weight, number of seeds
per pod, shelling percentage, harvest index and P concentration
in soyabean shoot.
Lime levels significantly influenced grain yield, growth and
yield components with exceptions of leaf dry weight, number of
days to 50% flowering, number of days to physiological maturity,
shelling percentage and P, Ca and N concentrations in soyabean
shoot. The grain yield was increased with lime application up to
500kg lime/ha but a further increase at 1000kg lime/ha was not
significant. The optimum level of lime for maximum grain yield
was 780 kg lime/ha.
Phosphorus fertilization significantly increased grain
yield, growth and yield components with exception of harvest
index which was significantly reduced by P application. The
grain yield was increased with increasing P levels up to 40kg
P/ha. The optimum rate of phosphorus was 3 5.4kg P/ha.
Application of phosphorus significantly increased P concentration
in soyabean shoot, however, phosphorus application had no
significant influence on Ca and N concentrations in soyabean
shoot.
A significant phosphorus rate and lime level interaction on
grain yield showed that the combined application of 40kg P/ha and
1000kg lime/ha gave the highest grain yield while a significant
phosphorus rate, lime level and method of lime application
interaction showed that the combined application of 4 0kg P/ha and
broadcasting or banding 1000kg lime/ha gave the highest yield.
Highly significant and positive correlations were obtained
between grain yield and all parameters tested except shelling
percentage and harvest index that were not significant
Description
A Thesis Submitted to the Postgraduate School of Ahmadu
Bello University, Zaria, in Partial Fulfillment of the
Requirements for the Degree of Master of Science in Agronomy
DEPARTMENT OF AGRONOMY
FACULTY OF AGRICULTURE
AHMADU BELLO UNIVERSITY
ZARIA, NIGERIA
November, 1997
Keywords
Rates,, Phosphorus Levels,, Soyabean,, Glycine max (L.) Merrill