Nitrification of fertilizers: Ammoniacal fertilizers used in study on the rate nitrifying bacteria function at various ammonia concentrations in soils
AuthorsF. E. Broadbent
K. B. Tyler
G. N. Hill
Authors AffiliationsF. E. Broadbent is Associate Professor of Soil Microbiology, University of California, Davis; K. B. Tyler is Assistant Olericulturist, University of California, Riverside; G. N. Hill is Laboratory Technician, University of California, Davis.
Hilgardia 12(10):9-14. DOI:10.3733/ca.v012n10p9. October 1958.
Results of experiments with three ammonium fertilizers—aqua ammonia, ammonium sulfate, and ammonium nitrate—have shown that not only the rate of nitrification but also the elapsed time required before the maximum rate is attained depends on the ammonia level in the soil.
Also in this issue:Canned fruits market, 1958-59: Sales records set by California's major canned fruit packs in 100th year but reduced crops influence 1958-59 outlook
Mechanical fruit tree shaking: Effect of frequency and stroke on fruit removal and power requirements analyzed in study of reciprocating type shaker
Rooting pear, plum rootstocks: Growth-regulator treatments and a warm preplanting storage period promoted rooting of fall-collected hardwood cuttings
Drill seeding of forage ranges: Heavy duty drill permits good placement of desirable grass and legume seeds for establishment of pasture on range land
Weeds controlled with cyanamid: New method for treating winter leafy vegetable crops with calcium cyanamid controlled weeds at moderate cost in tests
New selective herbicide tested: CDEC applied in pre-emergence treatment of seeded lettuce shows promise for selective weed control without crop injury
Deficiencies of micronutrients: Influence of phosphate fertilizers on micronutrients in avocado leaves subject of long-term study of Fuerte orchard
Septoria leaf scorch of azalea: Disease especially severe in cloudy, damp weather controlled by spray treatment in tests on experimental plot in Eureka
Lemon fruit quality studied: Comparative tests made of several new strains frequently used to avoid some diseases prevalent in old line Eurekas
Four new asparagus varieties: Now in third season of trial in experimental and commercial plantings, new varieties show promise but more testing needed
Some mosaic diseases of Prunus species
Mosaic diseases of the rose in California