International Journal of Horticulture, 2017,Vol.7, No. 23, 205-218
218
Figure 14 Proliferation rate of yield vs. time & maximum girth at top of stem: 2nd interim cut
4 Discussions
Plant stress may suitably be utilized to increase yield in some cases. Yam plants can adapt to extreme stress when
the seed weight is high. Earlier studies conducted in Giridih, Jharkhand (India) indicated that interim yam
detachment at about four and half months from sprouting and subsequent replantation of stems with a few roots
attached at the base of stems from seed weight 800 g has an increasing effect on total yield in extremely harsh
agro-climatic environment. Plants with seed weight 500 g have a steep proliferation rate of yam yield after a time
gap from sprouting. This suggests a possibility of using small seed corms for high yield even when the plant
survival condition is not so conducive. This may be accomplished by providing extra nourishments to these plants
with seed weight 500 g, near the maturity period.
5 Conclusions
Plants with seed weight 500 g is seen to have steep proliferation rate after a time gap from sprouting among seed
weight in the range 500 g - 800 g, when the plants are uprooted at about four and half months from sprouting time
and underground yam is detached before replanting the stems with a few roots attached to stem and experiment
continued till plant maturity. The procedure produced high yield of yam in total. A possibility of higher yield in
extremely harsh agro-climatic environment may be explored by providing extra nourishments after a time gap
from sprouting to the plants with seed weight 500 g having high proliferation rates of yam yield.
Refrences
Cleveland W.S., 1981, LOWESS: A program for smoothing scatter plots by robust locally weighted regression, The American Statistician, 35 (1): 54
Dasgupta R., 2015, Rates of convergence in CLT for two sample u-statistics in non iid case and multiphasic growth curve, growth curve and structural equation
modeling, In: Dasgupta R (ed.) Proceedings in mathematics and statistics, vol 132, Springer, Berlin, pp 35-58
Dasgupta R., 2017a, Longitudinal Growth Curve of Elephant Foot Yam under Extreme Stress and Plant Sensitivity. International Journal of Horticulture, 2017,
Vol. 7, No. 13
Dasgupta R., 2017b, Longitudinal Growth Curve of Elephant Foot Yam under Extreme Stress and Plant Sensitivity II, Growth Curve Models and Applications
Springer (USA). Chapter10. (To appear)
Dasgupta R., 2017c, Longitudinal studies on Mathematical Aptitude and Intelligence Quotient of North Eastern tribes in Tripura, Advances in Growth Curve
and Structural Equation Modeling: Proceedings 2017 Springer (USA), Chapter 1. (To appear)
Santosa E., Lian C.L., Sugiyama N., Misra R.S., Boonkorkaew P., Thanomchit K., 2017, Population structure of elephant foot yams (Amorphophallus
paeoniifolius (Dennst.) Nicolson) in Asia, PLoS ONE 12(6): e0180000
