Acid soil amendment through liming
17
Acid soil amendment through liming to increase crop yields in Panchagarh district By_ Sakil Ahmed 10309003 1 [email protected]
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Most crops grow best when the pH is at or near neutral which is a pH of 7.0. It is a sure bet that in those situations where the soil is at a pH of 4.8 that there will be a substantial reduction in crop production. Yield reductions under low pH conditions are the result of several factors. including reduced root mass, reduced nutrient uptake and reduced nutrient availability. When the soil pH goes down applied fertilizer becomes less available because it is tied up in a form that will make it unavailable to the plant for many years. This is especially true of phosphorous but potassium can also be made unavailable through this process. Ken Kelley, retired Crops and Soil Researcher at the Southeast Ag Research Center in Parsons did some work to determine how much yield reduction there is in various crops based upon specific soil pH levels. This test was run for three years and included grain sorghum, full-season soybeans, double-crop soybeans and wheat. The pH ranges included 4.9, 5.3, 6.1, 6.5 and 7.0. The yields at the 4.9 pH level includes sorghum at 83.8 bushels, full season beans at 26.5 bu., double-crop beans at 17.6 bu., and wheat at 45.4 bushels. Yields at the 5.3 pH level includes sorghum at 89.9 bu., full-season beans at 28.7 bu., double-crop beans at 20.3 bu. and wheat at 46.1 bu. Yields at the 6.1 pH level includes sorghum at 96.3 bu., full-season beans at 32.8 bu., double-crop beans at 22 bu. and wheat at 47.3 bu. Yields at the 6.5 pH level includes sorghum at 99.3 bu., full-season beans at 33.4 bu., double-crop beans at 23.3 bu., and wheat at 49.1 bu. Yields at the 7.0 pH includes sorghum at 99.0 bu., full-season beans at 34.3 bu., double-crop beans at 22.3 bu. and wheat at 48.2 bu. Looking at these results it is plain to see that the ideal pH lies somewhere between 6.5 and 7.0. Even though the yield differences in some instances may not seem that great, if you look at the difference in total production over time, it becomes quite apparent that liming does pay for itself many times over, especially in times of high crop prices.
Transcript of Acid soil amendment through liming
Acid soil amendment through liming to increase crop yields in Panchagarh district
By_ Sakil Ahmed10309003
SEQUENCE INTERODUCTION
EXPERIMENTAT DESIGN
TREATMENTS
EFFECT OF LIMING ON WHEWT YIELD
EFFECT OF LIMING ON MAIZE YIELD
EFFECT OF LIMING ON MAIZE YIELD
EFFECT OF LIMING ON MUGBEAN YIELD
CONCLUSION
RECOMMENDATION
INTERODUCTION Acid soils are an important issue and challenge in
this country.
It have adverse effect on soil fertility and crop productivity.
Except some Gangetic alluvial soils, whole Bangladesh are acidic.
The pH range of Panchagarh’s soils is below 4
Randomized Complete Block Design.
There were altogether 18 (6x3) unit plots
Each plot measuring 2. 5m x 4m
Inter-block and Inter-plot spacing were 0 .7/m and 0.5/m respectively
EXPERIMENTAT DESIGN
Fig: Experimental design
The liming material contain 20% Ca 10% Mg
which applied on six different rates.
T1 : Control
T2 : 0.5 t lime ha-1
T3 : 1.0 t lime ha-1
T4 : 1.5 t lime ha-1
T5 : 2.0 t lime ha-1
T6 : 2.5 t lime ha-1
TREATMENTS
T6 • 2.5 t lime ha-1
T5 • 2.0 t lime ha-1
T4 • 1.5 t lime ha-1
T3 • 1.0 t lime ha-1
T2 • 0.5 t lime ha-1
T1 • Control
Dolomite applied by scatter system before the last tillage.
Laddering should be done before scatter dolomite.
Make sure the proper meld of dolomite with soil.
Avoid Excess use of Dolomite.
TREATMENTS
EFFECT OF LIMING ON WHEWT YIELD
Statistically significant effect of liming was found in
Plant height Number of tillers Spike length Grains of Spike Weight of grain Total yield (t/ha)
Plant height
It shows that plant height has changed due to effect of liming.
Number of tillers
Due to the effect of lime application number of tillers has increased.
So, it prove that application of lime increase wheat yield .
EFFECT OF LIMING ON WHEWT YIELD
The yield and yield contributing parameters were higher in limed plots than unlimed.
The % mean yields increase over sites was 29 and 31, 99 and110 and 43 and 40 of wheat, mungbean and maize with the addition of 1 and 2 t lime ha-1, respectively over control.
Addition of dolomite increased soil pH substantially.
CONCLUSION
Liming with dolomite at 2 t ha-1 failed to produce higher yield of wheat and maize compared to 1 t dolomite ha-1.
This research it was proved that 1 t lime ha-1 is the best rate of dolomite for crop production.
Farmers can use 1 t lime ha-1for their crop production in acid soils to reduce soil acidity and get potential yield of crops.
RECOMMENDATION
