. Bulletin. Agriculture -- New Hampshire. 4 UNIV. OF N. H. AGR. EXPERIMENT STATION [lUlllclin 23<S FLOOD LANDS HELPED BY TESTS I'ollowiiifj;- the flood oi November, I'J'd;. Ford S. Prince obtained soil sani])les from the Connecticut River Valley, where fields were covered to a depth of ^4 to 20 inches with a dei)osit of silt. A series of tests made with the newly deposited soils in comparison, with the old in the university greenhouses during the winter showed that while organic matter and available nitrogen were too low for maximum yields in the soils, the lack of available potash and phos
. Bulletin. Agriculture -- New Hampshire. 4 UNIV. OF N. H. AGR. EXPERIMENT STATION [lUlllclin 23<S FLOOD LANDS HELPED BY TESTS I'ollowiiifj;- the flood oi November, I'J'd;. Ford S. Prince obtained soil sani])les from the Connecticut River Valley, where fields were covered to a depth of ^4 to 20 inches with a dei)osit of silt. A series of tests made with the newly deposited soils in comparison, with the old in the university greenhouses during the winter showed that while organic matter and available nitrogen were too low for maximum yields in the soils, the lack of available potash and phosphorus was the limiting factor. These preliminary tests were helpful in making definite crop plans for the follow- ing season. The plots which were manured at the rate of 20 tons to the acre, and the plots given 800 pounds of an 0-12-6 fertilizer produced good. Silt deposits like this, 24 inches deep, as a result of the flood in the Connecticut Valley caused a special soil problem during the year crops of alfalfa, swe^t clover and timothy. The plants grown on the plot treated with 200 pounds of nitrate of soda did |)Oorly. The new soils were found to be sufficiently sv/eet to grow alfalfa and other legumes without liming. Tests made of the hydrogen ion concentra- tion by T. G. Phillips showed that the PH of the new soils varied from to The PH of the soils in the state varies, as a rule, between and (State Fund.) SOIL FERTILITY STUDIES The problem of soil fertility is of basic importance in the agriculture of the state, and in 1925 the Experiment Station started a series of studies on carefully selected sites in different sections of New Hampshire. Five of these series are now being conducted, the fifth having been started during the past year. The investigations, which are being supervised by Ford S. Prince and Thomas G. Phillips, include experiments with both grass and legumes on the Whenal Farm in Greenland, and one wdth dairy farm rota- tions on the Carte
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