The effects of variable soil moisture regimes along a toposequence on root development, plant water status, and grain yield were investigated for ten rice varieties: (1) 63-83, (2) IB 43, (3) OS 6, (4) IB 6, (5) IR 1529-680-3, (6) C 22, (7) IRAT-13, (8) TOS 4680, (9) IET 1444 and (10) SE 302 G. T...
Mambani, B.
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Lal, R.
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[Response of upland rice varieties to drought stress: II. Screening rice varieties by means of variable moisture regimes along a toposequence]
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Response of upland rice varieties to drought stress: II. Screening rice varieties by means of variable moisture regimes along a toposequence
Lal, R.
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Moomaw, J.C.
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[Techniques for screening rice varieties for drought tolerance]
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Techniques for screening rice varieties for drought tolerance
The grain yields in the no-tillage plots were equivalent to those of conventionally plowed treatments. No-tillage treatments had higher organic matter content and, by controlling soil erosion, the silt and clay content than the plowed plots. The water holding capacity and moisture release charact...
Lal, R.
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[Notillage effects on soil properties and maize (Zea mays L. ) production in western Nigeria]
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Notillage effects on soil properties and maize (Zea mays L. ) production in western Nigeria
The effect of mulching on maize yield was investigated for luvisol and cambisol tropical soils during 1970–72. The increase in grain yield by mulching was 46, 52 and 22 per cent respectively, for 1970, 1971 and 1972. Mulched plants had higher growth rate and vigour and chlorotic symptoms of nutri...
Lal, R.
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[Soil temperature, soil moisture and maize yield from mulched and unmulched tropical soils]
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Soil temperature, soil moisture and maize yield from mulched and unmulched tropical soils
Measurements were made of physical characteristics of 119 samples from 23 profiles derived from two parent materials in Nigeria. The laboratory analyses included texture, plasticity and shrinkage characteristics, and a range of soil moisture constants including saturation point and moisture reten...
Lal, R.
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[Physical properties and moisture retention characteristics of some Nigerian soils]
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Physical properties and moisture retention characteristics of some Nigerian soils