| Aim of this study was to develop an appropriate recommendation for nitrogen management in irrigated areas of the central plain by using Leaf Color Chart (LCC). Eleven photoperiod-insensitive and 3phot operiod-sensitive rice varieties were studied for nitrogen management using LCC. The studies were conducted at Pathum Thani Rice Research Center both in wet and dry seasons during 2006-2007. Factorial in RCB with 4 replications were used which consisted of 2 factors, rice varieties and nitrogen managements. Four methods of nitrogen managements ; recommendation, application of nitrogen at LCC≤2, LCC≤3 and LCC≤4 were used in the experiments. The results showed that leaf color differs among varieties and seasons. For photoperiod-insensitive rice varieties, at... |
