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Image 41 of Annual report. 1921

Part of Kentucky Agricultural Experiment Station

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Kentucky Agrieulttcral Experiment Station 41 1 plant—to-row selection. The growing of corn and soybeans to- i gether in varying ratios was continued. The severe drouth ; of 1921 made corn practically a failure but did not greatly é reduce the yield of soybeans. The reduction in yield when E beans were planted thickly in corn was of course very striking 1 this year; in fact, the results of four years’ tests show that I soybeans planted in corn reduce the yield seriously unless but few beans are grown. 1 2: _- Hemp. Very interesting results have been obtained in ;] past years from the use of nitrogenous fertilizers on hemp. These tests were continued in 1921, both nitrate of soda and G sulfate of ammonia being used. The fertilized hemp grew at _ least two feet taller than the unfertilized and will certainly yield one—third more. This on corn land that was manured for 0 corn and is in excellent condition. S Oats. In the tests with oats, it 1nay be of interest to note [- that the Fulghum variety which has been so generally recom- it mended by several southern Stations in recent years gave about H two-thirds as large a yield as Burt at the Station farm this (3 YQZLI'. is Corn. In the tests on corn, the use of commercial nitro- L gen in amounts varying from 100 to 400 pounds per acre and i` applied both at planting time and when corn was waist high, lv gave no increase of yield this year. V. ; Corn Root-rot. Relative resistance of a large number of t l_ ears of corn to root-rot was determined by growing seedlings ` of each ear in a sand box in a warm room. The dates of death of the seedlings of each ear indicate their relative resistance fs to Fusarium moniliforme, which appears to be carried in suf- is fieient quantities in all ears to infect the seedlings. No in- I' crease in yield in the field was obtained by selecting the eleven 1‘ most resistant ears in the sand box in over 1,000 ears of Boone T County white when these were compared with the six most sus- ceptible ears from the same lot of corn. These were tested on n the very fertile bluegrass soil. The season was excessively dry le and all yields were very low. tx"