Agriculture of Pennsylvania, Volumen1State Board of Agriculture, 1878 |
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Página 32
... leaves only a dry current to pass over it . It is only two or three hundred miles this side that it becomes moisture . From this moisture which forms in that way we get another condition , or area , which is continually watered by rain ...
... leaves only a dry current to pass over it . It is only two or three hundred miles this side that it becomes moisture . From this moisture which forms in that way we get another condition , or area , which is continually watered by rain ...
Página 37
... leaves of the trees is enormous . Consequently , your evapo- ration power is extending twenty - five or thirty feet in depth . When it is cut away , the sun does not descend so deeply . With trees , you have six or seven feet , or more ...
... leaves of the trees is enormous . Consequently , your evapo- ration power is extending twenty - five or thirty feet in depth . When it is cut away , the sun does not descend so deeply . With trees , you have six or seven feet , or more ...
Página 42
... leaves within the hat or bonnet , as a prevention , can be copied upon an ample scale by surrounding our homes with suitable and sufficient shade trees . Much of the unhealthfulness of cities during the hot months undoubt- edly is ...
... leaves within the hat or bonnet , as a prevention , can be copied upon an ample scale by surrounding our homes with suitable and sufficient shade trees . Much of the unhealthfulness of cities during the hot months undoubt- edly is ...
Página 59
... leaves the opportunity for destruction open a part of the year . So important has the injury from insects due to the de- struction of birds become in Europe , that active measures have been taken to restore the injury by preventing the ...
... leaves the opportunity for destruction open a part of the year . So important has the injury from insects due to the de- struction of birds become in Europe , that active measures have been taken to restore the injury by preventing the ...
Página 64
... leaves , acts as a sponge by absorbing and holding at least a portion of the rain - fall , and by a slow action , either returning it to the air by evaporation from the leaf surface of the trees , or by percolation to the springs in the ...
... leaves , acts as a sponge by absorbing and holding at least a portion of the rain - fall , and by a slow action , either returning it to the air by evaporation from the leaf surface of the trees , or by percolation to the springs in the ...
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Términos y frases comunes
amount annual average beets Board of Agriculture bone phosphate Bucks county bushels butter cattle Cecidomyia cents per pound Chester Chester county chestnut commercial fertilizers contains corn cost County Agricultural Society Crawford county crop cultivation disease dollars Domestic animals Drilled eggs eighth acre Equivalent to ammonia Equivalent to bone exhibition expense experiments fair farm farmers feet forest fruit grain ground Guano Hessian fly horse hundred important inches insects Insoluble phosphoric acid interest Lancaster Lancaster county land live stock loss manufacture manure Meehan Mercer Moisture Nitrogen organization Pennsylvania Philadelphia phosphate of lime plant pleuro-pneumonia plow potash potatoes poultry pounds soluble premiums Professor profit rain-fall reverted phosphoric acid roots secretary seed soil sold soluble and reverted stearine sugar sulphate superphosphate temperature thousand timber tion trees veterinary weeds wheat White Silesian wood worth yield