AbstractThe effect of season of the year on the productivity of 13 varieties of rice was determined in monthly plantings at Gurabo over a 1-year period with irrigation applied only as required. The semidwarf, late maturing, medium-long grain, Sinaloa varieties produced the highest yields, averaging 4,910 pounds of rough rice per acre per crop. Yields of the 13 varieties tested were not markedly or consistently affected by season of the year. The data from these experiments show that two crops of rice with a total production of about 5 tons of rough rice per acre yearly can be grown in areas of the humid region of Puerto Rico where conditions exist similar to those prevailing at Gurabo.
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