Fertilizer Management of minor tuber crops in Coconut based cropping system
By: Pushpakumari R.
Contributor(s): Sasidhar V K (Guide).
Material type:
BookPublisher: Vellayani Department of Agronomy, College of Agriculture 1989DDC classification: 630 Online resources: Click here to access online | Click here to access online Dissertation note: PhD Abstract: An investigation was carried out to evolve the fertilizer management
practices of minor tuber crops in coconut based cropping systems during the
years 1985-86 and 1986-87. This investigation was carried out as two
experiments. In experiment I, screening of minor tuber crops under varying
intensities of shade was done adopting a split plot design with 4 replications.
In experiment II the fertilizer management of minor tuber crops in coconut
based cropping system was studied. The experiment II was conducted in
randomised block design with 3 replications. While experiment I was taken
up at the Instructional Farm, College of Agriculture, Vellayani, experiment II
was conducted at Coconut Research Station, Balaramapuram.
Shade had significant influence on the length of vine/height of plant,
LAI, NAR, CGR, dry matter production chlorophyll content of leaves, starch
and protein content of tubers and yield of tuber of greater yam, lesser yam,
tannia and elephant footyam.
With increase in shade intensity, the yield declined proportionately in
greater yam and elephant footyam reocrding highest yield under open
condition. The tuber yield of lesser yam under open and 25 per cent shade
levels were statistically on par, beyond which a drastic reduction in yield was
observed with increase in shade intensity. Tannia recorded highest yields
under 25 per cent shade, with an almost equal yield under 50 per cent shade.
Fertilizer levels did not significantly influence the growth and yield
characters of lesser yam, elephant footyam and tannia. But for greater yam
there was significant increase in plant height in the first year and tuber yield
in the second year with increase in fertilizer level.
Greater yam responded linearly to fertilizer levels recording
maximum yield with full recommended dose of fertilizer, although the
variation was significant only in the second year. Lesser yam had maximum
yield at medium fertilizer level and elephant footyam at lowest level, though
not significant. The general performance of tannia was very poor.
The economics worked out for the fertilizer management practices of
greater yam, lesser yam, tannia and elephant footyam revealed that among
the four crops tried, elephant footyam gave the maximum net profit followed
by greater yam and lesser yam. However, tannia resulted in a loss.
| Item type | Current location | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|
Theses
|
KAU Central Library, Thrissur Theses | 630 PUS/FE (Browse shelf) | Available | 170210 |
PhD
An investigation was carried out to evolve the fertilizer management
practices of minor tuber crops in coconut based cropping systems during the
years 1985-86 and 1986-87. This investigation was carried out as two
experiments. In experiment I, screening of minor tuber crops under varying
intensities of shade was done adopting a split plot design with 4 replications.
In experiment II the fertilizer management of minor tuber crops in coconut
based cropping system was studied. The experiment II was conducted in
randomised block design with 3 replications. While experiment I was taken
up at the Instructional Farm, College of Agriculture, Vellayani, experiment II
was conducted at Coconut Research Station, Balaramapuram.
Shade had significant influence on the length of vine/height of plant,
LAI, NAR, CGR, dry matter production chlorophyll content of leaves, starch
and protein content of tubers and yield of tuber of greater yam, lesser yam,
tannia and elephant footyam.
With increase in shade intensity, the yield declined proportionately in
greater yam and elephant footyam reocrding highest yield under open
condition. The tuber yield of lesser yam under open and 25 per cent shade
levels were statistically on par, beyond which a drastic reduction in yield was
observed with increase in shade intensity. Tannia recorded highest yields
under 25 per cent shade, with an almost equal yield under 50 per cent shade.
Fertilizer levels did not significantly influence the growth and yield
characters of lesser yam, elephant footyam and tannia. But for greater yam
there was significant increase in plant height in the first year and tuber yield
in the second year with increase in fertilizer level.
Greater yam responded linearly to fertilizer levels recording
maximum yield with full recommended dose of fertilizer, although the
variation was significant only in the second year. Lesser yam had maximum
yield at medium fertilizer level and elephant footyam at lowest level, though
not significant. The general performance of tannia was very poor.
The economics worked out for the fertilizer management practices of
greater yam, lesser yam, tannia and elephant footyam revealed that among
the four crops tried, elephant footyam gave the maximum net profit followed
by greater yam and lesser yam. However, tannia resulted in a loss.
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