The Owner-built HomesteadScribner, 1977 - 394 หน้า |
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ผลการค้นหา 1 - 3 จาก 33
หน้า 305
... fish does not confer the same status and prestige that herding livestock bestows on the land farmer , but fish can produce twenty times as much protein as the land animal . On fertile permanent pasture young cattle may gain 300 pounds ...
... fish does not confer the same status and prestige that herding livestock bestows on the land farmer , but fish can produce twenty times as much protein as the land animal . On fertile permanent pasture young cattle may gain 300 pounds ...
หน้า 306
... fish per acre per year . From a carelessly main- tained pond a farmer is lucky to land 100 pounds of fish a year . This is not fish farming . Efficient conservation begins with a properly engineered pond . The watershed is the first ...
... fish per acre per year . From a carelessly main- tained pond a farmer is lucky to land 100 pounds of fish a year . This is not fish farming . Efficient conservation begins with a properly engineered pond . The watershed is the first ...
หน้า 308
... fish that utilizes all of the available food supply at various levels of the pond . Too little food may cause pre- dacity among unrelated species of fish . Yet too much vegeta- tion as well as too many fish , all requiring quantities of ...
... fish that utilizes all of the available food supply at various levels of the pond . Too little food may cause pre- dacity among unrelated species of fish . Yet too much vegeta- tion as well as too many fish , all requiring quantities of ...
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