Nitrogen Fertilization of Northern Great Plains Rangelands

Abstract

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Effect of Nitrogen Fertilization on Certain Factors of a Western Nebraska Range Ecosystem

“…Nitrogen fertilization added days to the period of active growth because growth started earlier and continued longer than on nonfertilized range. Rogler and Lorenz (1957) found supporting evidence at Mandan, North Dakota. Application of 30 and 90 lb N /A gave highly significant yield increases over control plots.…”

Long-term agroecosystem research on northern Great Plains mixed-grass prairie near Mandan, North Dakota

“…Moreover, western wheatgrass, which increased in these pastures after the severe drought of the 1930s, responded most to N applications and accounted for most of the yield increase. On the other hand, blue grama did not respond to autumn-applied N (Rogler and Lorenz 1957). Additional long-term research on other sites at the NGPRL confirmed the shift in grass functional group with N fertilization Rogler 1972, 1973a, b).…”

“…Smika et al (1961) sampled the Rogler and Lorenz (1957) plots in 1959 after 9 yr of fertilizer treatments. The principal findings were that soil pH of the surface 15 cm of soil decreased from 6.5 in zero-N added plots to 5.9 1947, 1964, 1984are from Frank et al (1995.…”

Recovery of Ponderosa Pine-Bunchgrass Ranges through Grazing and Herbicide or Fertilizer Treatments

“…On the Northern Great Plains, Rogler and Lorenz (1957) found that applying 90 lb of N for 2 years to a heavily grazed pasture improved range condition and production more than did 6 years protection from grazing.…”