. Principles of agricultural chemistry [microform] . most worthless for farmingor fruit growing. Grade 5 Over Worthless. Grade 6 Over Worthless. The quantities of alkali mentioned above refer to the totalquantity of soluble salts. Utilization of Alkali Soils.^—(i) Grozvth of Resistant Crops.—One method of utilizing alkali soils is to grow crops which willresist the action of the alkali present. One of the most resistantcrops is salt bush, which endures drouth as well as alkali, and isused for pasturage, or as a hay crop. Sorghum, oats, and sugarbeets have a high resistance for
. Principles of agricultural chemistry [microform] . most worthless for farmingor fruit growing. Grade 5 Over Worthless. Grade 6 Over Worthless. The quantities of alkali mentioned above refer to the totalquantity of soluble salts. Utilization of Alkali Soils.^—(i) Grozvth of Resistant Crops.—One method of utilizing alkali soils is to grow crops which willresist the action of the alkali present. One of the most resistantcrops is salt bush, which endures drouth as well as alkali, and isused for pasturage, or as a hay crop. Sorghum, oats, and sugarbeets have a high resistance for alkali, also some varieties ofbarley, but it is difficult to secure a stand of these crops whenmore than per cent, of the total salts is present. (2) Treatment of Black Alkali.—Black alkali, due to sodiumcarbonate, may be converted into sodium sulphate by means ofgypsum. The sulphate is much less harmful to plants and the ^ Dorsey, Bulletin 35, p. Hilgard, Bulletin 128, California Exp. 266 PRINCIPLES OF AGRICULTURAL CHEMISTRY. r^ S^jj^^HEr^ ^^ ^Ji ^Mms^MM^ ^^ -^^^.^^ ^^1 ^^- ■aa Fig. 67.—Orange grove, (A) suffering from alkali, (B) after the alkali hasbeen driven down by irrigation. California Station. SOIL DEFICIENCIES 267 tilth of the land is decidedly improved. If much alkali is present,gypsum alone will not be sufficient because it does not remove thealkali, but merely changes it to another form. No chemical treat-ment is known which will counteract the effects of white alkali. (3) Scraping the Surface.—At the end of a dry season, whenthe alkali has risen to the surface, it may be scraped off andcarted away. This method might be used for small spots. (4) Flushing the Surface.—This method consists in floodingthe land with water and drawing it off after a short time. Thismethod can not be used for any soil in which the water sinks inrapidly, because the water will carry the alkali with it into thesoil. With rather heavy, impervious soils, with t
Size: 1956px × 1278px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidprinciplesof, bookyear1913
