Text-book of Pomology |
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acid phosphate acre amount apple trees average axillary Baldwin Baldwin apple bearing bloom blossoms branches buds Bull carpel cent cherry cion climate color cover-crops crop cultivation cultural dwarf effect Elberta experiments factors fertilizer flower-bud flowers freezing frosts fruit fruit-bud formation fruit-buds fruit-growing fruit-spur fruit-trees grape grass growing season grown growth hardy heavy Hedrick hence Hort important inches increase injury later leaf leaf-bud loam manure materials mature moisture mulch nitrate of soda nitrification nitrogen Northern Spy orchard peach peach trees pear percentage period phosphoric acid pistils plant-food plants plot plum pollen pollen-grains pollen-tube pomology potash practice produced propagated pruning Rept ripening roots sand secured seed seedlings self-fertile self-sterile shoots soil species spurs stamens storage sucrose sugar sulfate TABLE temperature terminal thinning tillage tion tissues Unthinned usually vary vegetative Winesap winter yield
Popular passages
Page 235 - Other conditions being equal, the variation in the time of occurrence of a given periodic event in life activity in temperate North America is at the general average rate of 4 days to each degree of latitude, 5 degrees of longitude and 400 feet of altitude; later northward, eastward, and upward in spring and early summer and the reverse in late summer and autumn.
Page 346 - Importations of nursery stock and other plants and seeds specified in this regulation, from countries not maintaining inspection, may be made under permit upon compliance with these regulations in limited quantities for experimental purposes only, but this limitation shall not apply to tree seeds.
Page 71 - In broad terms, this action of the length of day may be tentatively formulated in the following principle: Sexual reproduction can be attained by the plant only when it is exposed to a specifically favorable length of day (the requirements in this particular varying widely with the species and variety), and exposure to a length of day unfavorable to reproduction but favorable to growth tends to produce gigantism or indefinite continuation of vegetative development, while exposure to a length of day...
Page 314 - New varieties of every species of fruit will generally be better obtained by introducing the farina of one variety of fruit into the blossom of another, than by propagating from any single kind. When an experiment of this kind is made between varieties of different size and character, the farina of the smaller kind should be introduced into the blossoms of the larger...
Page 131 - Description. Fine gravel. Coarse sand. Medium sand. Fine sand. Very fine sand. Silt. Clay.
Page 7 - ... at ordinary temperatures a yellowish, somewhat viscid liquid, becoming much darker on keeping. When slightly cooled it forms a concrete mass, due to the separation of small acicular crystals which consist of a paraffin hydrocarbon. It possesses in a high degree the characteristic, fragrant odor of fresh apples. Besides the esters mentioned, It has been found to contain, by specific tests, small amounts of acetaldehyde and furfural. The yield of oil from the parings of the Ben Davis apple was...
Page 248 - ... quite as potent in preventing a set of fruit as is its injurious effect on the stigmatic juices. Variability in the blooming season. — Blooming time is a more or less shifting event. It is, of course, early or late as the season is early or late. It shifts also as regards other life events of plants. In some seasons a species or variety may bloom a little before leaves burst forth; in others, leaf and flower come out simultaneously and in still others leafing precedes blooming. In southern...
Page 218 - CLIMATE has been defined as the average condition of the atmosphere, while weather denotes a single circumstance, or event, in the series of conditions.
Page 244 - ... conditions, (4) productiveness and good market qualities. 11. The northern limit of apple growing is fixed by the minimum winter temperature, and the southern limit by the heat of the hottest part of the summer, occurring usually in July or August. 12. The attainment of the highest quality, appearance and keeping quality is very largely dependent on the warmth and length of the growing season. This may be measured with fair satisfaction for the apple-growing regions of North America by an average...
Page 57 - These are: (1) Though there be present an abundance of moisture and mineral nutrients, including nitrates, yet without an available carbohydrate supply vegetation is weakened and the plants are non-fruitful; (2) An abundance of moisture and mineral nutrients, especially nitrates, coupled with an available carbohydrate supply, makes for increased vegetation, barrenness, and sterility...