. Bulletin. Agriculture -- New Hampshire. General lay-out of plots. The heavily manured jilot at right shotvs slight lodging. , the lowest average acidity caused l)y two tons of ground limestone per acre was ; by four tons per acre, (Fig. 3, 1930). In in- dividual plots, these average values for pll are exceeded somewhat, but the highest figure recorded is Plowing alone results in decidedly increased soil acidity the following year (Fig. 3). This increase is prevented by the application of manure (Fig. 4). The whole field was plowed shortly before the 1931 soil samples were t
. Bulletin. Agriculture -- New Hampshire. General lay-out of plots. The heavily manured jilot at right shotvs slight lodging. , the lowest average acidity caused l)y two tons of ground limestone per acre was ; by four tons per acre, (Fig. 3, 1930). In in- dividual plots, these average values for pll are exceeded somewhat, but the highest figure recorded is Plowing alone results in decidedly increased soil acidity the following year (Fig. 3). This increase is prevented by the application of manure (Fig. 4). The whole field was plowed shortly before the 1931 soil samples were taken. This in itself would seem to be sufficient to ac- count for the marked increase in acidity of all plots at this sampling. Limestone and manure had been applied so many years before this sampling that they were no longer able to prevent the increased acidity due to plowing. By the second year the dififerences in acidity between plowed and unplowed soils had practically disappeared (Fig. 3). The buffer effect of manure is shown on unlimed soils by the decidedly greater acidity of those plots receiving no manure (Fig. 4). When. 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 Hampshire Agricultural Experiment Station. [Hanover, N. H. ] : New Hampshire Agricultural Experiment Station
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