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4536. Moodie, C.D. and S.C. Vandecaveye. 1944. Yield and nitrogen content of chickpeas, Cicer arietinum, as affected by seed inoculation.. Soil Sci. Soc. Am. Proc., 8:229-233.
A study of 2 yrs duration was made of the effect of inoculation upon the growth and nitrogen content of chickpeas. It was shown that chickpeas are readily inoculated, nodulate very proficiently by a suitable species of Rhizobium, and do not belong in the R. leguminosarium cross inoculation group. Chickpeas appeared to be more efficient in fixing atmospheric nitrogen than are field peas, and since they are grown as an intertilled crop some of the aspects of summer-fallowing are retained. The data obtained under the conditions of the experiments indicate that in so far as soil nitrogen economy is concerned the inclusion of chickpeas in the agricultural practice in the semi-arid area in eastern Washington where the annual rainfall is 18 inches or more offers considerable promise as an improvement on summer-fallow when grown in rotation with wheat. T: Yields and nitrogen content of chickpeas in 1941. Height, yield and nitrogen content of chickpeas in sand culture. Grain yields and nitrogen content of green and mature tissues of chickpeas in 1942.
5705. Rasmussen, P.E., H.P. Collins, and R.W. Smiley. 1989. Long-term management effects on soil productivity and crop yield in semi-arid regions of eastern Oregon.. OR Agr. Expt. Sta. Bulletin 675.
Summary of over 50 years of plot research at Pendleton, OR, with some results from Weston and Moro. Focuses on results from a continuous set of plots at the Pendleton station. Manure maintained highest yields, highest soil organic matter, highest pH compared to other treatments. Nitrogen fertilizer had a more marked effect on water infiltration than various tillage treatments. Green manure systems are generally not economic in the drier areas, due to competition for moisture with wheat, which is the most profitable crop. Legumes can contribute between 40 and 80 lb/ac N to the following crop. Varietal improvement over the past 50 years has been the most significant factor in increasing wheat yields. Burning straw accelerated organic matter losses from the soil and eventually reduced yields. Marginal returns have generally been lower from alternative crops than from wheat.