Abstract
Water and nitrogen (N) are the major limitations for maximizing crop yield. However, there has been no detailed examination of these limitations on fresh kernel yield in sweet corn (Zea mays L.). A two-year field study in Shiraz, Iran, was conducted to document sweet corn response to three soil-water regimes (irrigation to field capacity, and 80% and 60% of this amount) and five N fertilizer amounts (0, 75, 125, 175, and 225 kg N ha−1). Decreasing irrigation to 60% of field capacity resulted in yield decreases. The results showed that increasing N amounts increased fresh kernel yield to a maximum at 175 and 225 kg N ha−1. A highly positive, linear correlation was found between fresh kernel yield and kernel number formed per ear (R2 = 0.94), and also between kernel fresh yield and total crop mass (R2 = 0.88). Harvest index (HI) based on dry kernel weight varied between 0.20 and 0.41 in the two years with the lowest HI occurring in the 0 and 75 kg N ha−1 treatments.
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Claims 6
Claim · model-written summary
Decreasing irrigation to 60% of field capacity decreased sweet corn yield.
Verbatim
e0“A two-year field study in Shiraz, Iran, was conducted to document sweet corn response to three soil-water regimes (irrigation to field capacity, and 80% and 60% of this amount)”
e1“Decreasing irrigation to 60% of field capacity resulted in yield decreases”
Claim · model-written summary
Increasing N fertilizer amounts increased sweet corn fresh kernel yield, reaching a maximum at 175 and 225 kg N ha−1.
- Taxon
- sweet corne0
- Treatment
- increasing N amountse2
- Outcome
- fresh kernel yielde2
- Direction
- increasede2
- Qualifier
- to a maximum at 175 and 225 kg N ha−1e2
Not reportedComparator
Verbatim
e0“A two-year field study in Shiraz, Iran, was conducted to document sweet corn response to three soil-water regimes (irrigation to field capacity, and 80% and 60% of this amount)”
e2“The results showed that increasing N amounts increased fresh kernel yield to a maximum at 175 and 225 kg N ha−1”
Claim · model-written summary
Fresh kernel yield was highly positively correlated with kernel number formed per ear in sweet corn (R2 = 0.94).
Verbatim
e0“A two-year field study in Shiraz, Iran, was conducted to document sweet corn response to three soil-water regimes (irrigation to field capacity, and 80% and 60% of this amount)”
e3“A highly positive, linear correlation was found between fresh kernel yield and kernel number formed per ear (R2 = 0.94), and also between kernel fresh yield and total crop mass (R2 = 0.88)”
Claim · model-written summary
Kernel fresh yield was highly positively correlated with total crop mass in sweet corn (R2 = 0.88).
Verbatim
e0“A two-year field study in Shiraz, Iran, was conducted to document sweet corn response to three soil-water regimes (irrigation to field capacity, and 80% and 60% of this amount)”
e3“A highly positive, linear correlation was found between fresh kernel yield and kernel number formed per ear (R2 = 0.94), and also between kernel fresh yield and total crop mass (R2 = 0.88)”
Claim · model-written summary
Harvest index based on dry kernel weight of sweet corn ranged between 0.20 and 0.41 across the two years.
Verbatim
e0“A two-year field study in Shiraz, Iran, was conducted to document sweet corn response to three soil-water regimes (irrigation to field capacity, and 80% and 60% of this amount)”
e4“Harvest index (HI) based on dry kernel weight varied between 0.20 and 0.41 in the two years”
Claim · model-written summary
Harvest index of sweet corn was lowest in the 0 and 75 kg N ha−1 treatments.
Not reportedComparator
Verbatim
e0“A two-year field study in Shiraz, Iran, was conducted to document sweet corn response to three soil-water regimes (irrigation to field capacity, and 80% and 60% of this amount)”
e5“with the lowest HI occurring in the 0 and 75 kg N ha−1 treatments”
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