Abstract
Use of optimum plant spacing (planting density) is one of the important agronomic practices to maximize the productivity of lettuce. A field experiment was conducted to assess the responses of two lettuce varieties to different plant spacing at Debrezeit and Holeta Agricultural Research Centers representing two different agro-ecologies in Ethiopia. Nine treatment combinations of three levels of inter-row and three levels of intra-row spacing were studied on two types of lettuce varieties. The treatments were arranged in a randomized complete block design (RCBD) with three replications in a factorial experiment. The results revealed that marketable and total fresh leaf yield, and fresh leaf weight per plant were significantly affected by the main effect of plant spacing and variety as well as its interaction (p<0.05). Increasing planting density increased the total fresh leaf yield per unit area in both varieties, however reduced the fresh leaf weight per plant. The highest fresh leaf yield was obtained using 40 cm x 20 cm (125000 plants ha-1) planting density from variety Great Lakes, while variety Rsk-3 recorded its highest fresh leaf yield at the highest planting density of 30 cm x 20 cm (166667 plants ha-1). Great Lakes was superior over Rsk-3 in most yield parameters studied though Rsk-3 was better in leaf dry weight percent. Besides, both varieties responded differently in both sites while Great Lakes performed better at Debrezeit than at Holeta and Rsk-3 did well at Holeta than at Debrezeit. Hence, 40 cm x 20 cm and 30 cm x 20 cm could be used as the optimum plant spacing to grow Great Lakes and Rsk-3 respectively in the respective agro-ecologies. Key words: Agronomic practices, planting density, inter-and intra-row spacing, competition.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Plant spacing, variety, and their interaction significantly affected marketable and total fresh leaf yield.
- Taxon
- lettuce (Lactuca sativa L.)
Lactuca sativat0 - Material
- varietye0
- Treatment
- plant spacinge0
- Outcome
- marketable and total fresh leaf yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results revealed that marketable and total fresh leaf yield, and fresh leaf weight per plant were significantly affected by the main effect of plant spacing and variety as well as its interaction (p<0.05).”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
Plant spacing, variety, and their interaction significantly affected fresh leaf weight per plant.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Material
- varietye0
- Treatment
- plant spacinge0
- Outcome
- fresh leaf weight per plante0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results revealed that marketable and total fresh leaf yield, and fresh leaf weight per plant were significantly affected by the main effect of plant spacing and variety as well as its interaction (p<0.05).”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
Increasing planting density increased total fresh leaf yield per unit area in both varieties.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Treatment
- Increasing planting densitye0
- Outcome
- total fresh leaf yield per unit areae0
- Direction
- increasede0
- Qualifier
- in both varietiese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing planting density increased the total fresh leaf yield per unit area in both varieties, however reduced the fresh leaf weight per plant.”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
Increasing planting density reduced fresh leaf weight per plant.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Treatment
- Increasing planting densitye0
- Outcome
- fresh leaf weight per plante0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing planting density increased the total fresh leaf yield per unit area in both varieties, however reduced the fresh leaf weight per plant.”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
Great Lakes produced its highest fresh leaf yield at 40 cm x 20 cm spacing.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Material
- Great Lakese0
- Treatment
- 40 cm x 20 cm (125000 plants ha-1) planting densitye0
- Outcome
- fresh leaf yielde0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest fresh leaf yield was obtained using 40 cm x 20 cm (125000 plants ha-1) planting density from variety Great Lakes”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
Rsk-3 produced its highest fresh leaf yield at 30 cm x 20 cm spacing.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Material
- Rsk-3e0
- Treatment
- 30 cm x 20 cm (166667 plants ha-1)e0
- Outcome
- fresh leaf yielde0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“variety Rsk-3 recorded its highest fresh leaf yield at the highest planting density of 30 cm x 20 cm (166667 plants ha-1)”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
Great Lakes exceeded Rsk-3 in most yield parameters.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Material
- Great Lakese0
- Outcome
- most yield parameterse0
- Direction
- superiore0
- Comparator
- Rsk-3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Great Lakes was superior over Rsk-3 in most yield parameters studied”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
Rsk-3 exceeded Great Lakes in leaf dry weight percent.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Material
- Rsk-3e0
- Outcome
- leaf dry weight percente0
- Direction
- bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rsk-3 was better in leaf dry weight percent”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
Great Lakes performed better at Debrezeit than at Holeta.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Material
- Great Lakese0
- Outcome
- performed bettere0
- Direction
- bettere0
- Comparator
- Holetae0
- Setting
- Debrezeite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Great Lakes performed better at Debrezeit than at Holeta”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
Rsk-3 performed better at Holeta than at Debrezeit.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Material
- Rsk-3e0
- Outcome
- did welle0
- Comparator
- Debrezeite0
- Setting
- Holetae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rsk-3 did well at Holeta than at Debrezeit”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
The authors recommend 40 cm x 20 cm spacing for Great Lakes.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Material
- Great Lakese0
- Outcome
- 40 cm x 20 cme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“40 cm x 20 cm and 30 cm x 20 cm could be used as the optimum plant spacing to grow Great Lakes and Rsk-3 respectively in the respective agro-ecologies”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
The authors recommend 30 cm x 20 cm spacing for Rsk-3.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Material
- Rsk-3e0
- Outcome
- 30 cm x 20 cme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“40 cm x 20 cm and 30 cm x 20 cm could be used as the optimum plant spacing to grow Great Lakes and Rsk-3 respectively in the respective agro-ecologies”
t0“lettuce (Lactuca sativa L.)”
The same questions in other papers
density · growth · Lactuca sativa (garden lettuce)Positive and negative results
5 papers in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- positive
11 papers more in this group
See all 15 papers →density · yield · Lactuca sativa (garden lettuce)Results agree
12 papers in the same direction as this paper
- positive
- positive
- positive
9 papers more in this group
See all 13 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.