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Autor: Lal, R.

The effect of constant and fluctuating soil temperature and two soil moisture regimes on the growth, development, transpiration and nutrient uptake by maize seedlings was studied in a greenhouse investigation. The constant root temperatures were maintained at 30, 34, 35, 36, 37, and 38°C for both...


Lal, R.[Effects of constant and fluctuating soil temperature on growth, development and nutrient uptake of maize seedlings]Effects of constant and fluctuating soil temperature on growth, development and nutrient uptake of maize seedlings

Land clearing of a tropical rainforest implies cutting and felling of existing vegetation by manual or mechanized techniques, with or without windrowing, followed by burning in situ or in windrows. The objective of this study was to evaluate effects of land clearing at three levels of initial soi...


Ghuman, B.S.Lal, R.[Effects of soil wetness at the time of land clearing on physical properties and crop response on an Ultisol in southern Nigeria]Effects of soil wetness at the time of land clearing on physical properties and crop response on an Ultisol in southern Nigeria

The objective of this experiment was to evaluate the effects of growing a deep-rooting perennial on the root system development of a subsequent crop with low root penetrating ability. These effects were measured on a gravelly Alfisol with a compacted subsoil horizon for three tillage methods (zer...


Hulugalle, N.R.Lal, R.[Root growth of maize in a compacted gravelly tropical alfisol as affected by rotation with a woody perennial]Root growth of maize in a compacted gravelly tropical alfisol as affected by rotation with a woody perennial

We prepared sand and gravelly sand media in rigid cylinders, with different proportions and sizes of gravels and sands at various water tensions. Cores of forest topsoil were used for comparison. We measured the growth of pregerminated maize seedlings 72 hours after transplanting them into these ...


Vine, P.N.Lal, R.Payne, D.[The influence of sand and gravels on root growth of maize seedlings]The influence of sand and gravels on root growth of maize seedlings

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