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High temperature after anthesis may degrade the grain quality of rice (Oryza sativa L.). To understand the effect of stress duration (initial and mid grain filling stages) and the influence to grain quality at different spikelet positions, an indica cultivar and a japonica cultivar, Yangdao 6 and Yangjing 9538, were used in a pot experiment under 35 °C during the initial (8–18 d after anthesis) and...
Sudoku is a game with incremental intelligence and is popularizing in many countries of Asia, Europe, and America. Its most common pattern is to fill the digits 1 through 9 into a square with 9 rows by 9 columns and subdivided 9 boxes, so that each digit appears once, and only once, in every row, column, and box. In this article, the basic properties of k × k Sudoku squares are investigated in the...
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