RESPONSE OF GROWTH AND YIELD OF THREE VARIETY OF SOYBEAN (Glycine max [L] Merr.) ON SOME AVAILABLE SOIL WATER DEPLETIONS
Abstract
The aims of this research was to find out the effect of available soil water depletion on the growth andyield of three varieties of soybean (Glycinemax [L]Merr.). This study used a factorial ina completely randomized
design (CRD)with 2 factors, namely factor I (Available soilwater depletion fraction, p) and Factor II (Variety, V).
Each treatment consisted of 3 levels, factor I consists of P1(0.2), P2(0.4) and P3(0.6) of available soil water
depletion, and factors II consists of three variety,Wilis (V1), Kaba (V2) andTanggamus (V3), with repeats 3 times.
Reference evapotranspiration measurements on P(0.2) is done using the grass plant. The results showed that
treatment of available soil water depletion fraction (p), varieties, and their interactions were not significantly
different, on the growth and production. All three varieties of plant did not experience stress during growth and
development stage until harvest. The highest productionwas inTanggamus varieties (V3) in P1(0.2) of 17.86 g/pot
with a total of 80.430 ml of irrigation water, followed by Kaba (V2) on P1(0.2) 15.23 g/pot with total irrigation
water 75.800ml andWillis (V1) on P3(0.6) 14.96 g/potwith a total of 75.600ml of irrigationwater. The smaller
of available soil water depletion fraction the higher of evapotranspiration (ETc). Crop yield response factor to
water (Ky) greater than 1 (Ky>1), this means that the decrease of relative production larger than decrease of
relative evapotranspiration.
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2015-01-30
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