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Browse on keywords: organic matter wheat
Search results on 05/25/13
1632. Dormaar, J.F. and U.J. Pittman. 1980. Decomposition of organic residues as affected by various dryland spring wheat-fallow rotations.. Can. J. Soil Sci. 60:97-106.
1172. Campbell, C.A., K. Bowren, G. LaFond, H. Janzen, and R.P. Zentner. 1989. Effect of crop rotations on soi organic matter in two black chernozems.. Soil and Crop Workshop, Univ. Saskatchewan, Saskatoon, Feb. 1989.
1266. Chandra, P., W.B. Bollen, and L.T. Kadry. 1962. Microbial studies of two Iraqi soils representative of an ancient site.. Soil Sci. 94:251-257.
Alluvial soils cultivated for 4-5000 years. No fertilizer, crop residues removed. Low OM, N, and total bacteria and fungi. After 5 days incubation, micorbial levels increased to values similar to more humid, fertile soils. Azotobacter was present. Decomposition of native and added organic matter was relatively slow. Measured soil properties, microbial levels, ammonification, nitrification, denitrification, S oxidation, P mineralization, decomposition of various added organic materials.
2153. Gaur, A.C., R.S. Mathur and K.V. Sadasivam. 1980. Effect of organic materials and phosphate-dissolving culture on the crop yield.. Indian J. Agron., 25(3):501-503.
The seed of crops were inoculated with phosphate-solubilising culture (Pseudomonas striata) and (Aspergillus awamori). Rock phosphate application along with P-solubilising culture and full nitrogen significantly augmented both the grain and straw yields of wheat crop.
2735. Horner, G.M., M.M. Oveson, G.O. Baker, and W.W. Pawson.. 1960. Effect of cropping practices on yield, soil organic matter and erosion in the Pacific Northwest wheat region.. PNW Technical bulletin 1; USDA-ARS and Ag. Expt. Sta.'s of ID, OR, WA.
Summary of soil management experiments conducted over 40 yrs at six experiment stations. Covers: crop rotation, fertilization, and use of organic material. Some results: sweetclover and alfalfa were more effective than other legumes in increasing wheat yield. Yields of wheat were markedly affected by the sequences of cropping. Return of straw to soil decreased yields slightly under low N conditions. Organic and mineral N had no effect on yields in low precip. zones. Also covers runoff and erosion. T: many, eg.: effect of crop rotations on crop yield; crop yield as affected by grass/clover; effect of OM on wheat yield.
3080. Tangren, G.V.. 1979. Subsoil bulk densities in some Whitman county small grain fields.. M.S. Thesis, Dept. of Agronomy and Soils, WSU, Pullman, WA.
3373. Janzen, H.H.. 1987. Soil organic matter characteristics after long-term cropping to various spring wheat rotations.. Can. J. Soil Sci., 67:845-856.
Various spring wheat rotations with and without perennial forages on total and mineralizable soil organic matter contents. The organic C and N contents of soil after 33 yr of cropping were highest in treatments continuous W and FWWAAA, and decreased with increasing frequency of fallow in the rotation. The inclusion of the perennial forage in the rotation did not increase organic C and N levels above those abserved in the continuous wheat treatment. It was concluded that inclusion of perennial forages in spring wheat rotations for the purpose of enhancing soil fertility and organic matter levles was not justified under semi-arid conditions.
3471. Kaiser, V.G.. 1962. A lesson in farming from an old agriculture.. V. Kaiser papers, box 1, folder 80.
Describes wheat fallow fields in Turkey and Iran farmed over 3000 years; low yields (6-7 bu/ac), no inputs, no erosion - stable system; intensified production can cause massive problems and requires better soil conservation and organic matter management.
3550. Kauraw, L.P. and R.S. Singh. 1982. Effect of organic amendment of soil on the incidence of root rots. Indian J. Mycol. Pl. Pathol., 12(3):271-277.
Amendment of soil with oil cakes of margosa, castor of groundnut increased incidence of root rot caused by Pythium graminicolum. This increase was proportional to the amount of oil cake used. Margosa and groundnut cakes reduced root rot caused by Fusarium spp., while castor cake increased it. All the oil cake amendments reduced the incidence of Sclerotinium root rot. Amendment of soil with saw dust increased root rot caused by Fusarium spp. and H. sativum, but significantly decreased that caused by P. graminicolum or S. rolfsii even at the lowest dose used.
5122. Pesik, J., and L. Kozak. 1982. Possibilities of compensating unfavorable influence of less suitable forecrops in winter wheat.. Rostlina Vyroba, 28(4):381-388.
The strongest influence on yield was exerted by forecrop. The increased N-fertilization or organic fertilization decreased the yield difference in rotations with a higher cereal concentration, but it did not compensate the negative influence of less suitable forecrops on the yield level of unfertilized clover crops. The long-term application of organic matter resulted in the decrease of pH, however the amount of available nutrients (P, K, Mg) and humus percentage increased.