Borax, Borates, and Other Boron-Carrying Compounds

Boron is available on the market in a number of different compounds. Since the amount of boron contained in each compound is different, the concentration will determine the rate required per acre. Frequently, all of these boron-containing compounds are erroneously referred to as borax (11.36 percent boron)

Response of Corn to Broadcast Applications of Zinc

Where zinc deficiency in corn occurs on Kentucky soils it has been corrected by applying 3 to 6 pounds of elemental zinc per acre in the row at planting time. In some areas of the state, corn planters with row fertilizer attachments are not generally used, raising the question as to library the amount of zinc required when broadcast applications are made. Through the cooperation of Clarence Mitchell, Area Extension Specialist, a field was located where the 1966 corn crop showed zinc deficiency. Since the field was to be planted in corn (Connecticut 860) in 1967, a field trial with broadcast applications of zinc was conducted

Nitrogen Loss from Surface Application

Research work has shown that considerable nitrogen can be lost from surface applied ammonia-containing fertilizers. The nitrogen is lost due to the formation of ammonia which escapes into the air. Soil and weather conditions encouraging this loss are high temperature, moist soils, high pH and source of nitrogen

Results of Nitrogen Applications on Ohio River Overflow Bottom Areas in Henderson County in 1967

In cooperation with Stuart Brabant, Area Extension Agent in Henderson county , four field trials with nitrogen fertilization on corn were conducted in the Ohio River Bottom area. In two of the trials where corn was followed by corn, nitrogen was applied at the rates of 0, 50, 100, 150 and 200 pounds per acre, with each treatment replicated 4 times. In the two other trials, where corn was grown following soybeans, nitrogen rates of 0, 100 and 200 pounds per acre were replicated 4 times in one field and 3 times in the other. Planting was delayed until early June in three of the tests, owing to a spring overflow. One area located on slightly higher ground was planted prior to the overflow and was not flooded. The nitrogen, applied in the form of ammonium nitrate, was applied broadcast on the proper plots June 30, 1967

Soil Test Summary for 1964 Now Available

The number of soil samples tested in soil testing laboratories under the supervision of the College of Agriculture in 1964 showed an increase of 6,028 samples. In 1963, 46,444 samples were tested compared to 52,472 in 1964. These figures do not include the thousands of samples tested in commercial laboratories

Soil Test Results for 1967

The results of soil samples tested in laboratores under the supervision of the University of Kentucky Agricultural Experiment Station during 1967 have now been summarized

Comparison of Ammonium Nitrate and Urea as Nitrogen Source for Topdressing Established Grass Sods

When urea is broadcast and not worked into the soil there is a risk of some of the nitrogen being lost to the atmosphere as ammonia. In an effort to measure the effectiveness of urea compared to ammonium nitrate as sources of nitrogen for topdressing on established grass sod, an experiment comparing these two sources at rates to supply 0, 50, 100 and 150 pounds of nitrogen per acre was conducted in 1971

Phosphorus and Potassium Elemental or Oxide

Soil tests for phosphorus (P) and potassium (K) are reported on the elemental basis by all soil testing laboratories (state and county) in Kentucky

Determine Liming Needs on Tobacco Land This Fall

There have been far too many reports of manganese toxicity in tobacco this season for a condition which is so easily corrected. Manganese is one of the minor elements necessary for plant growth, but it is needed in very small amounts. When large amounts are taken up by a tobacco plant, light green or yellowish areas appear between the larger veins of the leaf. In severe cases the plant may be stunted or even die