Abstract
Abstract Iron deficiency in sorghum [ Sorghum bicolor (L.) Moench] occurs in spots throughout the High Plains on calcareous soils. This greenhouse experiment was conducted to determine the effect of N, P, and K with and without Fe and the effect of manure with and without additional Fe on Fe‐deficiency and dry matter yield of sorghum. Residual effects on a second and third crop also were measured. Pelleted manure and NPK (300‐100‐100 ppm) with Fe treatments were mixed with 3 kg of Arch fine sandy loam (Ustochreptic Calciorthid of the fine‐loamy, mixed thermic family). The treatments were Check, NPK, 0.5, 1.2, and 4% manure with Fe added to supply 0, 5, 10, 20, and 40 ppm Fe to the soil. Soil moisture was increased to 20% by weight periodically to maintain adequate soil moisture. Dry matter yield and observations indicated that manure effectively reduced Fe chlorosis and increased sorghum growth on Fe‐deficient calcareous soil. Either ferrous sulfate alone at rates up to 40 ppm Fe or fertilizer without Fe did not increase yields. Although yields were increased by adding Fe with fertilizer increases from Fe were not as great as those from manure. Manure had a residual effect on yield in the second and third crops. This indicates that manure can be used to correct Fe deficiency of grain sorghum on calcareous soils.
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Claims 8
Claim · model-written summary
Manure reduced sorghum iron chlorosis.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“manure effectively reduced Fe chlorosis and increased sorghum growth on Fe‐deficient calcareous soil”
Claim · model-written summary
Manure increased sorghum growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“manure effectively reduced Fe chlorosis and increased sorghum growth on Fe‐deficient calcareous soil”
Claim · model-written summary
Ferrous sulfate alone up to 40 ppm Fe did not increase yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Either ferrous sulfate alone at rates up to 40 ppm Fe or fertilizer without Fe did not increase yields”
e1“dry matter yield of sorghum”
Claim · model-written summary
Fertilizer without iron did not increase yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Either ferrous sulfate alone at rates up to 40 ppm Fe or fertilizer without Fe did not increase yields”
e1“dry matter yield of sorghum”
Claim · model-written summary
Iron added with fertilizer increased yields, less than manure did.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although yields were increased by adding Fe with fertilizer increases from Fe were not as great as those from manure”
e1“dry matter yield of sorghum”
Claim · model-written summary
Manure had a residual yield benefit in the second crop.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Manure had a residual effect on yield in the second and third crops”
e1“yields were increased by adding Fe with fertilizer increases from Fe were not as great as those from manure”
e2“dry matter yield of sorghum”
Claim · model-written summary
Manure had a residual yield benefit in the third crop.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Manure had a residual effect on yield in the second and third crops”
e1“dry matter yield of sorghum”
Claim · model-written summary
The authors conclude manure can correct iron deficiency in grain sorghum on calcareous soils.
- Outcome
- manure can be used to correct Fe deficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“manure can be used to correct Fe deficiency of grain sorghum on calcareous soils”
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