caa a22 4500 386316023 CHVBK 20180307111605.0 cr unu---uuuuu 161130s1988 xx s 000 0 eng 10.1017/S0889189300002435 doi S0889189300002435 pii (NATIONALLICENCE)cambridge-10.1017/S0889189300002435 Hornick Sharon B. Soil scientist, U.S. Department of Agriculture, Agricultural Research Service, Beltsville, MD 20705. Use of organic amendments to increase the productivity of sand and gravel spoils: Effect on yield and composition of sweet corn [Elektronische Daten] [Sharon B. Hornick] Crops grown on sand and gravel spoil areas are subject to temperature, moisture, and nutrient stresses due to the infertile, acidic, and coarse-textured properties of the spoil material. Additions of organic materials such as feedlot manure and sewage sludge compost applied at rates of 40, 80, and 160 Mg/ha were found to improve these spoil areas by providing (1) a more favorable pH for seedling germination and root development, (2) essential crop nutrients, and (3) a greatly increased water content of the spoils in the treated plots compared to fertilized controls. The manure-treated spoil plots had a higher water content than either the compost-treated spoils or the limed and fertilized control plots. In a drought year when the wastes were reapplied, both grain and stalk yields of sweet corn were highest for the manure-treated plots. The low heavy metal content makes these organic materials safe for use as soil conditioners. In addition, uptake and accumulation of toxic metals by sweet corn is generally less than other crops. The interaction between the kind and rate of organic amendment applied, the amount of rainfall in any given growing period, and the water content of the treated spoils determined the final nutrient composition of the stalks, leaves, and grain, as well as the grain and stalk yield. Copyright © Cambridge University Press 1988 feedlot manure nationallicence sewage sludge compost nationallicence root development nationallicence mine spoils nationallicence soil water content nationallicence yields nationallicence sweet corn nationallicence American Journal of Alternative Agriculture Cambridge University Press 3/4(1988), 156-162 0889-1893 3:4<156 1988 3 AJA https://doi.org/10.1017/S0889189300002435 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0889189300002435 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Hornick Sharon B. Soil scientist, U.S. Department of Agriculture, Agricultural Research Service, Beltsville, MD 20705 NATIONALLICENCE 773 0- American Journal of Alternative Agriculture Cambridge University Press 3/4(1988), 156-162 0889-1893 3:4<156 1988 3 AJA CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge