Research Article
Residual Effects of Applied Chemical Fertilisers on Growth andSeed Yields of Sunflower (Helianthus annuus cv. High Sun 33) After the Harvests of Initial Main Crops of Maize (Zea mays L.), Soybean (Glycine max L.) and Sunflower (Helianthus annuus)
Department of Agricultural Technology, Faculty of Technology,Mahasarakham University, Mahasarakham 44000, Thailand