Rahimi, Abdul Zahir <br/><br/>
Effect of potassium rates on growth and yield of rice under different cultivation methods 

 - Pathum Thani, Thailand  :  Asian Institute of Technology,  2017 
 - 65 leaves :  ill.,  +1 online resource 
 - Thesis ;  no. AS-17-06 .
 - Asian Institute of Technology.  Thesis ;  no. AS-17-06 .
<br/><br/> A Thesis submitted in partial fulfillment of the requirements for the degree of  Master of Science in Agricultural Systems and Engineering, School of Environment, Resources and Development 
<br/><br/>Thesis (M.Sc.) - Asian Institute of Technology, 2017 
<br/><br/> The experiment was conducted at ASE greenhouse, AIT, Thailand. The objective of this  research was to assess the effect of different rates of potassium under two methods of  cultivation (direct seeding and transplanting) on three rice varieties (Pathumthani-1, RD57  and RD41). Four rates of potassium oxide (0, 80, 120 and 160 kg/ha) was applied in both  methods of cultivation (direct seeding and transplanting). Potassium fertilizer had highly  significant on plant height, productive tiller, non-productive tiller, number of panicle, filled  grain, 1000-grain weight, and grain per panicle and yield. Therefore, by addition of 80, 120  and160 kg/ha potassium fertilizer total yield increased by 28.6%, 46.8% and 37% ; 40.3%,  23.6% and 49.5% ; and 31.3%, 39.8% and 29.6% in Pathumthani-1, RD57 and RD41  varieties, respectively, than the control. Although, in this study the effect of cultivation  methods, verities and water productivity were observed significantly effect on the most of  parameters. In conclusion, by application of potassium fertilizer the total yield of three rice  varieties increased in both methods of cultivation. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants--Effect of potassium on<br/>Rice--Fertilizers<br/>Rice--Planting