. Annual white sweet clover and strains of the biennial form . s. Theplants of each row were thinned to stand from 6 to 8 inches apart inthe row. All the plants of a lot thus had practically identical soilconditions. The diagram (fig. 5) represents the variations in heightof 65 consecutive plants in the row of the departments selectionNo. 10001-C. Seed was sown on April 10, 1920, and measurementsWere made on July 16, at which time most of the plants were coming Annual White Sweet Clover. 11 into bloom. The plants in the other rows showed similar date of blossoming there was also
. Annual white sweet clover and strains of the biennial form . s. Theplants of each row were thinned to stand from 6 to 8 inches apart inthe row. All the plants of a lot thus had practically identical soilconditions. The diagram (fig. 5) represents the variations in heightof 65 consecutive plants in the row of the departments selectionNo. 10001-C. Seed was sown on April 10, 1920, and measurementsWere made on July 16, at which time most of the plants were coming Annual White Sweet Clover. 11 into bloom. The plants in the other rows showed similar date of blossoming there was also considerable variation. Thefirst observation was made on July 14, when fully opened racemeswere found on many plants. These were all removed. Later observa-tions showed that different plants came into flower at various timesand as late as August 10. The diagrams (fig. 6) show the relative percentage of all theplants in a lot that came into flower at the dates specified. Much variation was also noted in branching habit, leafiness, andseed-producing capacity.^. ^^ . I ^^ ^ ^ !^ 0 N s ^1 b h S6 ^ ^ 5 O 5 ^i S> ^ ^ ^ ^ ^ ^1 ^ <V ^5 0 ^ ^ h b ^ 15 ^ aaff£ <S£l£CT/(W /OfV/9 SELECTION i b b 5 It) ^ 1 /LUN0J6 ^SELECTION Pig. 6.—Diagrams showing the percentage of plants of annual white sweet clover whichblossomed at different dates. None of the annual white sweet-clover strains so far tested by theUnited States Department of Agriculture are wholly free from somebiennial blood. During the past summer, samples of five lots wereplanted at the Arlington Experimental Farm, near Washington,D. C, and also in cooperation with the Tennessee and Kansas Agri-cultural Experiment Stations at Knoxville, Tenn., and Manhattan, ^ While this circular was in press, information was received from Mr. Willis Crites, abreeder of annual white sweet clover, tliat plants giown in the greenhouse from wildAlabama seed of the annual form are much earlier than those from the Iowa F
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Keywords: ., bookcentury1900, bookdecade1920, bookidannualwhites, bookyear1921
