Zinc in the SoilMost Nebraska soils

Zinc in the Soil

Most Nebraska soils contain adequate zinc for crop production; however, areas within fields may not contain enough zinc for normal plant growth. Zinc deficiency is more likely to occur in calcareous (high lime) soils of central and western Nebraska than in the neutral to acid soils of southeastern Nebraska. Zinc deficiency is often observed where the topsoil has been removed by erosion, land grading for irrigation, or during terrace construction. Also, zinc levels are low in many soils in the Sandhills. Zinc deficiency is favored by cold, wet weather.

Soil tests for zinc have been developed and should be used where the zinc status of a soil may be in doubt. Soils that have had topsoil removed, are low in organic matter, or contain excess lime are most likely to respond to zinc fertilizers. Careful field division and sampling are most important for an accurate zinc test.

Most soil testing laboratories use the DTPA extracting procedure to determine the zinc availability index. Normally there are three soil zinc availability levels as determined by DTPA. These are: Low (L) DTPA Zn (0 to 0.5); Medium (M) (0.51 to .8); and High (H) greater than 0.8.

Phosphorus-zinc interactions have received considerable attention the last 20-25 years. It has been observed that applying phosphorus without zinc on calcareous soils low in zinc can reduce corn yields drastically. If zinc is included with the phosphorus, yields may be improved. This reduction in corn yields by phosphorus occurs only on soils low or marginally adequate in zinc and usually containing excess lime.

Zinc in the Soil

Most Nebraska soils contain adequate zinc for crop production; however, areas within fields may not contain enough zinc for normal plant growth. Zinc deficiency is more likely to occur in calcareous (high lime) soils of central and western Nebraska than in the neutral to acid soils of southeastern Nebraska. Zinc deficiency is often observed where the topsoil has been removed by erosion, land grading for irrigation, or during terrace construction. Also, zinc levels are low in many soils in the Sandhills. Zinc deficiency is favored by cold, wet weather.

Soil tests for zinc have been developed and should be used where the zinc status of a soil may be in doubt. Soils that have had topsoil removed, are low in organic matter, or contain excess lime are most likely to respond to zinc fertilizers. Careful field division and sampling are most important for an accurate zinc test.

Most soil testing laboratories use the DTPA extracting procedure to determine the zinc availability index. Normally there are three soil zinc availability levels as determined by DTPA. These are: Low (L) DTPA Zn (0 to 0.5); Medium (M) (0.51 to .8); and High (H) greater than 0.8.

Phosphorus-zinc interactions have received considerable attention the last 20-25 years. It has been observed that applying phosphorus without zinc on calcareous soils low in zinc can reduce corn yields drastically. If zinc is included with the phosphorus, yields may be improved. This reduction in corn yields by phosphorus occurs only on soils low or marginally adequate in zinc and usually containing excess lime.

Zinc in the Soil

Most Nebraska soils contain adequate zinc for crop production; however areas within, fields may not contain. Enough zinc for normal plant growth. Zinc deficiency is more likely to occur in calcareous (high lime) soils of central. And Western Nebraska than in the neutral to acid soils of southeastern Nebraska.Zinc deficiency is often observed where the topsoil has been removed, by erosion land grading for irrigation or during,, Terrace construction. Also zinc levels, are low in many soils in the Sandhills. Zinc deficiency is favored, by cold wet. Weather.

Soil tests for zinc have been developed and should be used where the zinc status of a soil may be in doubt. Soils. That have had, topsoil removedAre low in, organic matter or contain excess lime are most likely to respond to zinc fertilizers. Careful field division. And sampling are most important for an accurate zinc test.

Most soil testing laboratories use the DTPA extracting procedure. To determine the zinc availability index. Normally there are three soil zinc availability levels as determined by, DTPA. These are:Low (L) DTPA Zn (0 to 0.5); Medium (M) (0.51 to. 8); and High (H) greater than 0.8.

Phosphorus-zinc interactions have. Received considerable attention the last 20-25 years. It has been observed that applying phosphorus without zinc on calcareous. Soils low in zinc can reduce corn yields drastically. If zinc is included with, the phosphorus yields may be improved.This reduction in corn yields by phosphorus occurs only on soils low or marginally adequate in zinc and usually containing. Excess lime.