. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Steam Sterilization on Water-Soluble Matter in Soils. 257 two steamed soils is entirely reversed, as is also the percentage of nitrogen, Soil No. I at the end of seven months yielding more than Soil No. 2, but having a lower percentage of nitrogen. This illustrates the difference in the length of time required for different soils to recover from the
. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Steam Sterilization on Water-Soluble Matter in Soils. 257 two steamed soils is entirely reversed, as is also the percentage of nitrogen, Soil No. I at the end of seven months yielding more than Soil No. 2, but having a lower percentage of nitrogen. This illustrates the difference in the length of time required for different soils to recover from the steaming Fig. 69—Second crop grown after steaming. Showing continued benefit G A O—Soil No. I, unsteamed G A S—Soil Xo. I, steamed P A S-—Soil Xo. 2, steamed P A O—Soil Xo. 2, unsteamed il\n experiment with the growth of wheat seedlings in the extracts of steamed and unsteamed soils throws some light upon the cause of the unfavorable effect of the freshly steamed soil upon plant growth. Soil Xo. I was steamed and an extract made of the steamed and also one of the unheated soil. One part of water to one part of soil was used in making the extracts. Wheat seedlings were grown for four weeks in the extracts, both undiluted and diluted by adding three parts of water to one of extract. Table V shows the nutrients present in the extracts diluted and undiluted. It will be noticed that the PO4 and K are much higher in the extract of the steamed soil, while the nitrates arc lower. However, nitrogen was doubtless supplied in ample amount 9. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State College of Agriculture; Cornell University. Agricultural Experiment Station. [Ithaca, N. Y. ?]
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