Estimating Percolation and Lateral Water Flow on Sloping Land in Rainfed Lowland Rice Ecosystem

The effects of water regime on phosphorus responses of rainfed lowland rice cultivars.

BACKGROUND AND AIMS Soil phosphorus (P) solubility declines sharply when a flooded soil drains, and an important component of rice (Oryza sativa) adaptation to rainfed lowland environments is the ability to absorb and utilize P under such conditions. The aim of this study was to test the hypothesis that rice cultivars differ in their P responses between water regimes because P uptake mechanisms...

A Multi-Agent Model to Help Managing Rainfall Variability in the Rainfed Lowland Rice Ecosystem of Northeast Thailand

Rainfed lowland rice (RLR) production is the main activity in northeast Thailand. Unpredictable droughts and coarse-textured soil are the main constraints usually cited to explain the low yields and economic poverty of this region. Past studies tried to improve the drought tolerance of rice varieties and hydrological functioning at the field level. How water is used at the farm level remains la...

Lateral seepage deep percolation runoff and the efficiencies of water use and application in irrigated rice in kooshkak region in fars provience I.R.Iran

Improving drought tolerance in rainfed lowland rice: An example from Thailand

A large portion of the world’s poor farm in rainfed systems where the water supply is unpredictable and droughts are common. In Thailand there are approximately 6.2 million ha of rain fed lowland rice, which account for 67% of the country’s total rice-growing area. This rice system is often characterised by too much and too little water in the same season. Farmers’ estimates of their annual los...

Management of clay soils for rainfed lowland rice-based cropping systems: an overview

The problem of concern in this project is that in the dry season following a lowland rice (Oryza sativa L.) crop, yields of post-rice crops are generally low, despite adequate water commonly being available in the soil pro®le to grow a potentially high yielding dry season (DS) crop without irrigation. Maize (Zea mays L.) yields are as low as 1 Mg haÿ1 or less, soybean (Glycine max L. Merr.) and...