Productive Poultry Husbandry a Complete Text Dealing With the Principles And P
Productive Poultry Husbandry a Complete Text Dealing With the Principles And P
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In our eReader you can find the full English version of the book. Read Productive Poultry Husbandry a Complete Text Dealing With the Principles And P Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Productive Poultry Husbandry a Complete Text Dealing With the Principles And P
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To quickly assess the difficulty of the text, read a short excerpt:
2. That it is possible systematically to breed males with a high productive gametic constitution.
3. That in breeding to increase egg laying the production has been divided into two kinds, namely, (a) normal or natural produc- tion, which takes place during the natural breeding season or spring months, the average in this period being about thirty eggs; and (6) excess laying period, which is possessed by fewer birds, and which represents from 100 to 175 eggs laid during the fall and winter. The... problem, then, is how to breed birds which shall possess in their gametic make-up germ cells representing both of these periods.
4. That improvement in egg production comes about by raising the general average through elimination of the poor producers; or, in other words, by bringing the mass to a higher level, and not to any great extent by raising the standard and improving the best.
5. That in order to accomplish this improvement, as above outlined, it is necessary to know what has been the individual performance of the members of the flock for a number of genera- tions in succession, and this can only be determined by keeping small breeding pens and by trap nesting.
What to read after Productive Poultry Husbandry a Complete Text Dealing With the Principles And P?
You can find similar books in the "Read Also" column, or choose other free books by Harry Reynolds Lewis to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
2. That it is possible systematically to breed males with a high productive gametic constitution.
3. That in breeding to increase egg laying the production has been divided into two kinds, namely, (a) normal or natural produc- tion, which takes place during the natural breeding season or spring months, the average in this period being about thirty eggs; and (6) excess laying period, which is possessed by fewer birds, and which represents from 100 to 175 eggs laid during the fall and winter. The... problem, then, is how to breed birds which shall possess in their gametic make-up germ cells representing both of these periods.
4. That improvement in egg production comes about by raising the general average through elimination of the poor producers; or, in other words, by bringing the mass to a higher level, and not to any great extent by raising the standard and improving the best.
5. That in order to accomplish this improvement, as above outlined, it is necessary to know what has been the individual performance of the members of the flock for a number of genera- tions in succession, and this can only be determined by keeping small breeding pens and by trap nesting.
What to read after Productive Poultry Husbandry a Complete Text Dealing With the Principles And P?
You can find similar books in the "Read Also" column, or choose other free books by Harry Reynolds Lewis to read onlineMoreLess
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