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Soils, Fertilizers and Irrigation

- If Your Land Needs It At All
Alfalfa Over Hardpan
Alkali Gypsum And Shade Trees
Almond Hulls And Sawdust
An Abuse Of Grape Pomace
Application Of Manure Ashes
Applying Thomas Phosphate
Artesian Water
Ashes And Poultry Manure
Barnyard Manure And Alkali
Blasting Or Tiling
Bones For Grape Vines
California That I Am Very Much Puzzled Which Kind To Select
Caustic Lime Not A Good Absorbent
Charcoal Is A Medicine Not A Food

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One Thousand Questions In California Agriculture Answereds

1/2 Pounds Gain In Weight Per Day
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My orange seed-bed stack has "damp-off." Same say "too much water;" "not
enough water;" "put on lime;" etc. I use a medium amount of water and
more of my stack is affected than that of any other grower. One man has
kept his well soaked since planting, and only about six plants were
affected. Another has used but little water, keeping them very dry; he
has lost none.

Damping-off is due to a fungus which attacks the tender growth when
there is too much surface moisture. It may be produced by rather a small
amount of water, providing the soil is heavy and the water is not
rapidly absorbed and distributed. On the other hand, a lighter soil
taking water more easily may grow plants without damping-off, even
though a great deal more water has been used than on the heavier soil.
Too much shade, which prevents the sun from drying the surface soil, is
also likely to produce damping-off, therefore, one has to provide just
the right amount of shade and the right amount of ventilation through
circulation of the air, etc. The use of sand on the surface of a heavier
soil may save plants from damping-off, because the sand passes the water
quickly and dries, while a heavier surface soil would remain soggy. Lime
may be of advantage if not used in too great quantities because it
disintegrates the surface of the soil and helps to produce a dryness
which is desirable. Keeping the surface dry enough and yet providing the
seedlings with moisture for a free and satisfactory growth is a matter
which must be determined by experience and good judgment.

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