Abstract
Abstract Experimental programs aimed at improving seedling establishment in the semiarid tropics require quantitative information concerning the interaction between the seedbed environment and preemergent seedling growth. The model here described links a soil heat and water model, a soil strength model, and a temperature‐dependent maize ( Zea mays L.) shoot growth model to predict the response of preemergent maize seedlings to a physical environment typical of the semiarid tropics. In comparisons with field measurements taken in the semiarid tropics under high drying rate conditions, the model simulations yielded accurate representations of soil water, temperature, strength, and preemergent shoot growth of maize. The model was also used to compare the effects of radiation‐ vs. wind‐dominated evaporative demand on preemergent seedling growth in a hardsetting seedbed. Results showed that under radiation‐dominated conditions, the early onset of high soil temperature limited seedling growth, while under wind‐dominated conditions, the early development of high soil strength affected seedling growth first. Simulations using surface mulch as an ameliorative management practice showed that mulch greatly reduced soil evaporation, thereby eliminating high soil strength as a limitation to seedling establishment. Results indicate that the model is a potentially useful tool for investigating the likely effects of soil and climate on seedling emergence.
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Claims 5
Claim · model-written summary
The model yielded accurate representations of soil water, temperature, strength and preemergent shoot growth of maize compared with field measurements.
- Outcome
- accurate representations of soil water, temperature, strength, and preemergent shoot growthe1
- Comparator
- field measurementse1
- Setting
- semiarid tropicse1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Simulating Maize Emergence Using Soil and Climate Data”
e1“In comparisons with field measurements taken in the semiarid tropics under high drying rate conditions, the model simulations yielded accurate representations of soil water, temperature, strength, and preemergent shoot growth of maize”
Claim · model-written summary
Under radiation-dominated conditions, the early onset of high soil temperature limited maize seedling growth in simulation.
- Treatment
- radiation‐dominated conditionse2
- Outcome
- seedling growthe2
- Direction
- limitede2
- Qualifier
- early onset of high soil temperaturee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Simulating Maize Emergence Using Soil and Climate Data”
e2“under radiation‐dominated conditions, the early onset of high soil temperature limited seedling growth”
Claim · model-written summary
Under wind-dominated conditions, the early development of high soil strength affected maize seedling growth first in simulation.
- Treatment
- wind‐dominated conditionse3
- Outcome
- seedling growthe3
- Qualifier
- early development of high soil strengthe3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Simulating Maize Emergence Using Soil and Climate Data”
e3“under wind‐dominated conditions, the early development of high soil strength affected seedling growth first”
Claim · model-written summary
Surface mulch greatly reduced soil evaporation in simulated maize seedbeds.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Simulating Maize Emergence Using Soil and Climate Data”
e4“Simulations using surface mulch as an ameliorative management practice showed that mulch greatly reduced soil evaporation, thereby eliminating high soil strength as a limitation to seedling establishment”
Claim · model-written summary
Surface mulch eliminated high soil strength as a limitation to maize seedling establishment in simulation.
- Treatment
- surface mulche4
- Outcome
- high soil strength as a limitation to seedling establishmente4
- Direction
- eliminatinge4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Simulating Maize Emergence Using Soil and Climate Data”
e4“Simulations using surface mulch as an ameliorative management practice showed that mulch greatly reduced soil evaporation, thereby eliminating high soil strength as a limitation to seedling establishment”
The same questions in other papers
radiation · growth · Zea mays (maize)Positive and negative results
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See all 30 papers →mulching · growth · Zea mays (maize)Positive and negative results
121 papers in the same direction as this paper · 16 in the opposite direction · 2 reporting no difference from an alternative
- negative
- negative
- no effect
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See all 140 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.