Browse on keywords: fertility fertilizer
Search results on 01/20/18
935. Bolton, F.E.. 1990. Starter fertilizer trials - no-til.. Sherman Station Field Days, OSU, Moro, OR.
The use of starter fertilizer, including N, P, and S in various combinations, was examined for no-till winter wheat and winter barley. Variable results occurred, but yield increased were measured in most years. About 3 out of 5 times, the increase was economically feasible. Overall yields under no-till averaged equal to or slightly lower than conventional tillage.
4247. McDole, G.R.. 1932. Fertilizer suggestions for Idaho farmers.. U. of Idaho Ext. Bull. #88.
Idaho in first stage of commercial fertilizer use; fertilizer will never become a substitute for good farming methods; fertilizer should supplement existing means of maintaining fertility; p.10 "Are commercial fertilizers injurious to the soil?" Continued use of fertilizer without maintaining organic matter has led to impaired physical condition.
272. Allmaras, R.R., K. Ward, P.E. Rasmussen and C.R. Rohde.. 1978. Soil acidification from long-term use of ammonium-type nitrogen fertilizers.. OR Agr. Expt. Sta. Progress Report Misc. #78-4, p.55-58.
Long term use of ammonium fertilizers has reduced pH in the plowlayer in proportion to the rate of application; no noticeable difference in 12-18 zone of soil; about 50% of the applied fertilizer was lost, perhaps by denitrification; 1 T of pure limestone raised the pH by 0.5 unit; liming to pH 6.2 improved pea growth and increased soil water storage; potential increase infiltration and reduce erosion with liming. T: pH x depth, N rate, lime requirement.
493. Arthur, Tom. Feb. 1989. Precision application with Spud-Tech.. American Vegetable Grower, p. 14-17..
A Wisconsin company has developed a computer software system and variable fertilizer applicator for use on farm fields. Soil samples are taken for every 2.3 acres to generate a nutrient map, which is loaded into a PROM chip. The chip is inserted into the on-board computer on the Spud-Nik applicator rig, which can vary the rates of six different materials. Both fertilizer and pesticides can be varied according to soil parameters.
613. Baker, G.O.. undated. Commercial fertilizer recommendations for northern Idaho field crops.. Univ. of Idaho, and SCS.
Fertilizer recommendations; wheat 20-30 lb/ac N; grain seed 60 lb/ac N; legumes 100 lb/ac gypsum; alfalfa also needs borax 40 lb/ac. T: Fertilizer rates for various crops.
915. Boawn, L.C., C.E. Nelson, F.G. Viets, and C.L. Crawford. 1960. Nitrogen carrier and nitrogen rate influence on soil properties and nutrient uptake by crops.. WA Agr. Expt. Sta. Bulletin 614.
Irrigated soils near Prosser. Native soil. Soil pH dropped from 7.4 to 6.0 (0-8") with ammonium sulfate at 160 N/ac. Effect of ammonium nitrate was less, while calcium nitrate had no effect on pH. Fertilizer N recovery was 75-85%. N application increased Mn uptake, but no trends for other elements.
961. Bolton, F.E.. 1988. Liquid starter fertilizers on winter wheat and barley in no-till plantings.. Columbia Basin Agr. Res. Sta. Special Report #827, p.33.
Liquid starter fertilizer on winter wheat and barley in no-till plantings.
1077. Broadbent, F.E. and F.J. Stevenson. 1966. Organic matter interactions.. Agricultural anhydrous ammonia: technology and use. p. 169-197..
1987. Fireman, M.. 1945. Effect of sodium nitrate and ammonium fertilizers on the permeability of western soils.. .
Experiments on 51 western soils. Sodium nitrate reduced permeability 41-86%. Ammonium nitrate and ammonium sulfate also decreased permeability, but to a lesser extent. T; Permeability tests; variations in permeability.
2043. Fowler, D.B. and J. Brydon. 1989. No-till winter wheat production on the Canadian prairies: placement of urea and ammonium nitrate fertilizers.. Agron. J. 81:518-524.
A practical snow management system, which utilizes no-till seeding into standing stubble immediately after harvest, has permitted expansion of winter wheat production in western Canada. This study examined grain responses to urea and ammonium nitrate fertilizer banded and broadcast at seeding, or broadcast in the late fall or early spring. A moisture shortage biased the results. Fall banding prior to seeding helped reduce volatilization losses of urea (which were as much as 50%), but presented other problems and did not outperform broadcast ammonium nitrate.