Life Sciences Commons^™

Phosphorus Soil Test Change Following The Addition Of Phosphorus Fertilizer To 16 Kentucky Soils, William O. Thom, James E. Dollarhide

Agronomy Notes

When applying phosphorus to soils it is important to know how much the soil test P changes with the addition of various rates. Soils are different in how they respond to varying rates of application, and only limited information is available for Kentucky soils.

Alfalfa Response To Varying Rates Of Phosphorus And Potassium Fertilization On Deep, Red, Limestone - Derived Soils Of The Pennyroyal Area In Kentucky, H. C. Vaught, Kenneth L. Wells, K. L. Driskill

Agronomy Notes

The Western Pennyroyal area of Kentucky consists largely of deep, well-drained limestone-derived soils occurring on an undulating to rolling landscape. A thin loess mantle overlies the limestone residuum in many areas. Soils on these landscapes are capable of good crop production, providing the basis of the rather intensive grain-hay- tobacco-livestock farming systems common to the Pennyroyal area. Because of the well-suited physical characteristics of these soils, alfalfa is a very important hay crop to this area.

Strongly Acid Soil Must Be Limed For Corn, Harold Miller

Agronomy Notes

The necessity of liming strongly acid soils that will be planted in corn is well illustrated in a demonstration conducted by Harold Vaught, Area Extension Agent in Adair County.

A field that was well fertilized with nitrogen, phosphorus, and potassium produced low corn yields in 1966. Analysis of a soil sample from the field showed that it was strongly acid soil. (Similar conditions have been reported by many farmers throughout the state in recent years.) Since this field was to be planted in corn again in 1967, a liming demonstration was planned .

Preserve And Use Tobacco Stalks, George D. Corder

Agronomy Notes

When Kentucky's 1964 tobacco crop is stripped , there will be about 176,000 tons of stalks in and around stripping barns. There will be more than $2 million worth of nitrogen, phosphorus and potassium in them.

If these stalks are left outside the barn and exposed to winter rains, 61 percent of the nitrogen, 38 percent of the phosphorus, 83 percent of the potassium and 41 percent of the organic matter may be lost.

Phosphorus And Potassium Elemental Or Oxide, Harold F. Miller, George D. Corder

Agronomy Notes

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

Tobacco Stalk Production, Value And Use, George D. Corder, Harold F. Miller

Agronomy Notes

When Kentucky farmers finish stripping the 1963 tobacco crop they will have 176,000 tons of tobacco stalks worth $2 million on their farms.

These stalks will contain 9.8 million pounds of nitrogen, 932,000 pounds of phosphorus (2 million pounds of P₂O₅) and 13 million pounds of potassium (15.6 million pounds of K₂O). Equal amounts of these plant nutrients bought in commercial fertilizers in 1963 would have cost more than $2 million.