The Owner-built HomesteadScribner, 1977 - 394 หน้า |
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หน้า 306
... pond , which is discussed later in this chapter . The conservation pond is best used as a water supply for culture ponds . Nevertheless , if well managed , it can yield as much as 500 pounds of fish per acre per year . From a carelessly ...
... pond , which is discussed later in this chapter . The conservation pond is best used as a water supply for culture ponds . Nevertheless , if well managed , it can yield as much as 500 pounds of fish per acre per year . From a carelessly ...
หน้า 308
... pond . Too little food may cause pre- dacity among unrelated species of fish . Yet too much vegeta- tion as well as ... pond builders suggest building tree - planted islands , further increasing pond perimeters . Water insects , tadpoles ...
... pond . Too little food may cause pre- dacity among unrelated species of fish . Yet too much vegeta- tion as well as ... pond builders suggest building tree - planted islands , further increasing pond perimeters . Water insects , tadpoles ...
หน้า 310
... ponds can triple their yield . Fertilizer obscures their depths yet perfectly clear water denotes poor fertility . If you can see a white object a foot beneath the surface , a pond is not adequately fertilized . Organic fertilizer ...
... ponds can triple their yield . Fertilizer obscures their depths yet perfectly clear water denotes poor fertility . If you can see a white object a foot beneath the surface , a pond is not adequately fertilized . Organic fertilizer ...
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