IRRIGATION REQUIREMENTS FOR DOUBLE CROPPING OF LOW AND RICE IN MALAYA

1. Introduction 2. Water use investigations in rice fields 2.1 General remarks on water use in rice field 2.2 Areas investigated 2. 3 Investigations 2.3.1 Bumbong Lima padi experiment station, Province Wellesley 2.3.2 Kubang Pasu 'evapotranspiration plot', Jitra, Kedah 2.3.3 Muda irrigation scheme, Province Wellesley 2.3.4 Pasir Mas irrigation scheme, Kelantan 2.3.5 Salor irrigation scheme, Kelantan 3.The rainfall in Malaya and the necessity for irrigation 4. Factors determining the water requirements in rice fields 4.1 Water for evapotranspiration 4.2 Water for percolation 4.3 Water for establishing water layer in the field 4.4 Water for saturation of the soil 5. Water-duty for rice irrigation scheme 6. Distribution of irrigation water to the rice fields 7.The prospect of double cropping

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