Abstract
Compared to fresh manure, composting reduces material quantity, hauling and spreading costs, odor, and weed seed viability, while improving physical properties. The availability of nutrients for plant growth, however, may be less from manure compost. Objectives of this field study were to evaluate beef cattle manure compost as a nutrient source for irrigated grain sorghum [ Sorghum bicolor (L.) Moench] and to determine the effects of annual compost and N fertilizer applications on soil chemical properties. Five rates of manure compost (0, 0.9, 1.8, 3.6, and 7.2 ton dry matter/acre) and four rates of N fertilizer (0, 55, 110, and 165 lb/acre) in a factorial arrangement were applied annually from 1987 to 1990 on a Ulysses silt loam (fine silty, mixed, mesic, Aridic Haplustoll) at Tribune, KS. Grain yields were greater from combinations of compost and N fertilizer than from either applied alone. The apparent fertilizer efficiency was 13% for compost compared with 36% for N fertilizer. Soil P, K, and organic matter increased linearly with increased rates of compost. Conversely, increased rates of N fertilizer decreased soil P and K, while having no effect on organic matter. Soil Na levels were increased by compost additions but not to excessive levels. Soil NO 3 − ‐N levels were not affected by compost applications but were increased by N fertilizer. Manure compost is effective for maintaining or increasing soil chemical levels, especially P, without excessive accumulation of NO 3 − ; but should be applied with N fertilizer for optimum grain production.
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Claims 10
Claim · model-written summary
Compost combined with nitrogen fertilizer yielded more grain than either input alone.
- Taxon
- Grain Sorghum
Sorghum bicolort0 - Treatment
- combinations of compost and N fertilizere0
- Outcome
- Grain yieldse0
- Direction
- greatere0
- Comparator
- either applied alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields were greater from combinations of compost and N fertilizer than from either applied alone.”
t0“Grain Sorghum”
Claim · model-written summary
Apparent fertilizer efficiency was 13% for compost.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- composte0
- Outcome
- apparent fertilizer efficiencye0
- Value
- 13%e0
- Comparator
- N fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The apparent fertilizer efficiency was 13% for compost compared with 36% for N fertilizer.”
t0“Grain Sorghum”
Claim · model-written summary
Apparent fertilizer efficiency was 36% for nitrogen fertilizer.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- N fertilizere0
- Outcome
- apparent fertilizer efficiencye0
- Value
- 36%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The apparent fertilizer efficiency was 13% for compost compared with 36% for N fertilizer.”
t0“Grain Sorghum”
Claim · model-written summary
Increasing compost rates raised soil P, K and organic matter linearly.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- increased rates of composte0
- Outcome
- Soil P, K, and organic mattere0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil P, K, and organic matter increased linearly with increased rates of compost.”
t0“Grain Sorghum”
Claim · model-written summary
Increasing nitrogen fertilizer rates reduced soil P and K.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- increased rates of N fertilizere0
- Outcome
- soil P and Ke0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased rates of N fertilizer decreased soil P and K”
t0“Grain Sorghum”
Claim · model-written summary
Increasing nitrogen fertilizer rates had no effect on soil organic matter.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- increased rates of N fertilizere0
- Outcome
- organic mattere0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased rates of N fertilizer decreased soil P and K, while having no effect on organic matter.”
t0“Grain Sorghum”
Claim · model-written summary
Compost additions increased soil sodium without excessive accumulation.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- compost additionse0
- Outcome
- Soil Na levelse0
- Direction
- increasede0
- Qualifier
- not to excessive levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil Na levels were increased by compost additions but not to excessive levels.”
t0“Grain Sorghum”
Claim · model-written summary
Compost applications did not affect soil nitrate nitrogen.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- compost applicationse0
- Outcome
- Soil NO 3 − ‐N levelse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil NO 3 − ‐N levels were not affected by compost applications”
t0“Grain Sorghum”
Claim · model-written summary
Nitrogen fertilizer increased soil nitrate nitrogen.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- N fertilizere0
- Outcome
- Soil NO 3 − ‐N levelse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil NO 3 − ‐N levels were not affected by compost applications but were increased by N fertilizer.”
t0“Grain Sorghum”
Claim · model-written summary
Authors recommend compost with nitrogen fertilizer for optimal grain production.
- Taxon
- Grain SorghumSorghum bicolort0
- Outcome
- applied with N fertilizer for optimum grain productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“should be applied with N fertilizer for optimum grain production.”
t0“Grain Sorghum”
The same questions in other papers
fertilization · yield · Sorghum bicolor (sorghum)Results differ
79 papers in the same direction as this paper · 12 in the opposite direction
- no effect
- positive
- no effect
88 papers more in this group
See all 92 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.