行列의 分解에 關하여

다국어 초록 (Multilingual Abstract)

he barley crops has been traditional used for among farmers during the winter period, The aim of experiment was to study the yield of barley crops obtained from the second cut grasses and its an economics aspect. The species of barley used for the study was the Suwon No 31, the yondai No 89 and the Chaechon No 5. The time of seeding was at 15, 30, September and l5 October respectively. The distribution of experimental plots was the control (non cut), the first cut, (cutted at 10 March) and the second cut(cutted at 10 December and 10 March). The works were carried out for consecutive three years from 1965 to 1968. The summaries of experiment was as follows.
1. The yield of green fodder was larger when it was harvested the earlier growing stage. The second cut yield was the heavier than the first cut one. The yield of Chaecbon No 5 was the highest (P 0.01) compared with the other species of barley(P 0.01).
2. The yield of barley grain was the highest at 30 september seeding plot ompare to as 15 September one (P 0.01) and also it demonstrate five percent significant difference in comprison with 15 October one. The second year of barley grain yield obtained from the grass stage cut was the lower than the control. (P 0.05). However the yield of the first and the third year's cut was the lower than first cut (P 0.05) and there is no significant difference between the control and second cut plot.
3. When it was compared with the total amount of total digestive nutrient value between the 30 September seeding plot and the first cut and the second cut, the yield of the later plot grasses was the highest (P 0.01) and also each treatment demonstrate one percent and 5 percent significant difference respectively. However there was no significant difference between the species of barley.
4. The economical analysis demonstrate that there was mo significant difference between the barley specis differences. However the green stage grass cut plot caused the higher income than the controled plot, specially the second cut and 30 September seeding plot showed the highest income. Therefore it is recommended that to carry out grass cut the during early growing period of the late Autumn of and early Spring and the grasses can be used as green fodder to amimls and also the barley grains can be obtained thereafter. These will naturally brings the higher yield to per acre of ground and also the higher income, when it is planted the two weeks earlier than traditional farming way.

목차 (Table of Contents)

• 目次
• Ⅰ 緖論 = 3
• Ⅱ 硏究史 = 3
• Ⅲ 試驗方法 및 材料 = 7
• Ⅳ 試驗成績 = 8
• Ⅴ 考察 = 33
• Ⅵ 摘要 = 50
• Ⅶ 參考文獻 = 52
• Summary = 53