. Bulletin. Agriculture -- New Hampshire. 28 UNIV. OF N. H. AGR. EXPERIMENT STATION [BuUctiu 238 active when dried slowly. However, of all the substances studied this was true only of nitrate of soda. Copper nitrate, copper sulphate, sodium hydroxide, ammonium sulphate, sodium carbonate and sulphuric acid are- more active when dried quickly. To obtain an 80 percent kill a necessary strength of the herbicide was found to be for copper nitrate 1% ; sulphuric acid ; copper sulphate ; ferrous sulphate ; and ammonium sulphate 36%. (State Fund.) TIME STUDIES IN ORCHARDS Filler trees in
. Bulletin. Agriculture -- New Hampshire. 28 UNIV. OF N. H. AGR. EXPERIMENT STATION [BuUctiu 238 active when dried slowly. However, of all the substances studied this was true only of nitrate of soda. Copper nitrate, copper sulphate, sodium hydroxide, ammonium sulphate, sodium carbonate and sulphuric acid are- more active when dried quickly. To obtain an 80 percent kill a necessary strength of the herbicide was found to be for copper nitrate 1% ; sulphuric acid ; copper sulphate ; ferrous sulphate ; and ammonium sulphate 36%. (State Fund.) TIME STUDIES IN ORCHARDS Filler trees in apple orchards have little value under New Hampshire conditions with cheap land and the sod mulch system, according to the eco- nomic fruit studies being made by H. C. Woodworth and G. F. Potter. Even with permanent trees, the highest value, based on expected earnings, seems to come at twenty years of age. On account of the piling up of costs by compound interest the importance of having a tree come to bearing early is clearly shown. An early-bearing tree may have paid for itself at 16 years of age, while a late-bearing tree may require 27 years. The time studies indicate that two skilled men can care for trees with extra unskilled help at certain seasons. In growing the fruit, pruning, spraying and thinning require special training and skill and must, therefore, be done by the orchardist himself and the crew of trained men. Picking up brush, fertilizing, tillage, mowing, mulching, protection, propping and picking apples may be done by men of ordinary intelligence upon short instruction. Thinning also could be done satisfactorily by the better class. More efficient methods in this orchard have saved time and labor in filling the spray tank of day labor available. It is thought, therefore, that in the case of large. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of thes
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