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G. Bheemaiah

Abstract

A field trial was carried out during 1995 , 1996 and 1997 at Students' Farm , College of Agriculture , Rajendranagar on sandy loam soils to find out the effect of irrigation and fertilizer on growth of Teak. DBH and height of Teak was found more with values of 0.111 m and 7.5 m (1997) where irrigation was given for every 10 days (I₁₀). During other years also the I₁₀ had beneficial effect on growth. Application of 300g urea/tree (N₃) had resulted in more height (7.81m) , diameter growth (0.114m) and volume growth (0.052m³) during 1997 , where compared to other levels of urea. The interaction of irrigation and urea , did not affect the growth of Teak significantly. From the results it is apparent that the growth of Teak can be increased substantially with irrigation for every 10 days along with urea application on sandy loam soils of semi-arid tropical regions.

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G. Bheemaiah , M. V. R. Subrahmanyam , Syed Ismail

Abstract

To find out the effects of irrigation and fertilizer practices on growth of Teak, study was initiated at Hyderabad on sandy loam soils.After a period of 30 months after Teak planting the results revealed that irrigation practices of giving water at 10, 20 and 30 days intervals significantly influenced both the height and girth of Teak trees. Irrigation at 10 days (I₁) and 20 days (I₂) intervals resulted in superior taller trees with greater girth during all periods of study, as compared to irrigation at 30 days interval, (I₁) and no irrigation (I₀. The three years old Teak trees were 4.02 m taller and 28.5 cm thicker in I₃ which was on par with I₂ (4.66 m and 28.04 cm). Though the application of urea did not effect the height and girth of Teak trees during all perinds of study but higher doses of urea application i.e., 200 g (N₂) and 300 g/plant (N₃) caused marginal increase in the growth of Teak. The interaction between irrigation and urea application too, was found insignificant. The greater incremental growth both in height and girth during the period (from 12 months to 30 months after planting) was markedly observed with frequent irrigations but not with nitrogen doses.

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M. V. R. Subrahmanyam , G. Bheemaiah , Syed Ismail

Abstract

A field trial was initiated in the year 1991 on red sandy loam soils of Student's Farm, College of Agriculture, Rajendranagar, Hyderabad to study the compatibility of tree crop association in sissoo based agroforestry system under dry land situation. During two years of study (1991 and 1992), the yields of arable crops viz., sunflower, castor and red gram did not vary much in association with sissoo except during second year where the yields of red gram was reduced considerably. However, the mean yields of sunflower (4.38 q/ha) and castor (4.86 q/ha) when intercropped with sissoo where recorded on par with that of respective sole crops (4.48 and 4.77 qlha respectively). The gross returns were also found higher in sunflower and castor crops under intercropping as well as sole cropping when compared to that of redgram. The associated crops did not exert any inimical effects on growth of sissoo. But the rate of increment in growth of sissoo was decreased to some extent in association with redgram. Growing sissoo trees proved beneficial specially in improving the site by increasillg organic carbon and nitrogen substantially as compared to fallow land. The results revealed that growing of sissoo in association with arable crops provides sustainability to the traditional arable farming in dry regions.

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Syed Ismail , G. Bheemaiah , M. V. R. Subrahmanyam

Abstract

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