Abstract
Sorghum (Sorghum bicolor L. Moench) is cultivated as monocrop in Eritrea. Efforts were made to grow sorghum-pigeonpea (Cajanus cajan L. Millspp.) intercrop on the tillage, fertilizers and supplementary irrigations necessary for sorghum. Experiments were conducted in terraced fields at Hamelmalo during 2013-15 to evaluate growth and yield of sorghum-pigeonpea intercrop in split plot design with conventional tillage (CT), reduced tillage (RT) and zero tillage (ZT) in main plots and rainfed (I0), 50% of full irrigation (I1), 75% of full irrigation (I2) and 100% of full irrigation (I3) in subplots. All irrigations were stopped 15 days before sorghum maturity. Full irrigation was 60 mm applied at 50% depletion of available soil water in 1 m profile. Sorghum growth was faster than pigeonpea until 85 days from planting and pigeonpea growth accelerated only after sorghum harvesting. About 80% of sorghum roots were within 0.6 m profile but more than 75% of pigeonpea roots were below 0.60 m depth. This showed a weaker competition between the two crops for nutrients, water and light. Both grain and stover yields of sorghum were optimum in RT + I2 during the 2 years. Highest grain yield was 6900 kg·ha-1 in RT + I3 in 2013, which was at par with that in RT + I2. Mean residual soil moisture at sorghum harvesting was 74 mm·m-1, which decreased to 8 mm·m-1 by pigeonpea harvesting. Residual moisture was more in the irrigated than non-irrigated plots. Pigeonpea yields were optimum (1363 kg·ha-1) in RT + I3 and lowest (297 kg·ha-1) in ZT + I0. Average water use by sorghum-pigeonpea was 374 mm by sorghum harvesting and 438 mm by pigeonpea harvesting, producing total sorghum equivalent yield of 7475 kg·ha-1. This raised average water use efficiency from 12.6 kg·ha-1·mm-1 at sorghum harvesting to 17.1 kg·ha-1·mm-1 at pigeonpea harvesting. Benefit was doubled at 50% of full irrigation and >4 times at 75% of full irrigation.
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Claims 15
Claim · model-written summary
Sorghum grew faster than pigeonpea until day 85; pigeonpea growth accelerated after sorghum harvest.
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sorghum growth was faster than pigeonpea until 85 days from planting and pigeonpea growth accelerated only after sorghum harvesting”
Claim · model-written summary
About 80% of sorghum roots occurred within the upper 0.6 m soil profile.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“About 80% of sorghum roots were within 0.6 m profile”
Claim · model-written summary
More than 75% of pigeonpea roots occurred below 0.60 m depth.
- Taxon
- pigeonpea
Cajanus cajane0 - Organ / stage
- rootse0
- Outcome
- roots were below 0.60 m depthe0
- Value
- 75%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more than 75% of pigeonpea roots were below 0.60 m depth”
Claim · model-written summary
Sorghum grain and stover yields were optimum under reduced tillage plus 75% irrigation.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both grain and stover yields of sorghum were optimum in RT + I2 during the 2 years”
e1“reduced tillage (RT)”
e2“75% of full irrigation (I2)”
Claim · model-written summary
Highest sorghum grain yield was 6900 kg·ha-1 under reduced tillage plus full irrigation in 2013, at par with reduced tillage plus 75% irrigation.
- Treatment
- RT + I3e0
- Outcome
- grain yielde0
- Direction
- Higheste0
- Value
- 6900 kg·ha-1e0
- Comparator
- RT + I2e0
- Setting
- 2013e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highest grain yield was 6900 kg·ha-1 in RT + I3 in 2013, which was at par with that in RT + I2”
e1“Sorghum growth was faster”
Claim · model-written summary
Mean residual soil moisture decreased from 74 to 8 mm·m-1 between sorghum and pigeonpea harvests.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mean residual soil moisture at sorghum harvesting was 74 mm·m-1, which decreased to 8 mm·m-1 by pigeonpea harvesting”
Claim · model-written summary
Residual moisture was greater in irrigated than non-irrigated plots.
Verbatim
e0“Residual moisture was more in the irrigated than non-irrigated plots”
t0“Sorghum-Pigeonpea Intercrop”
Claim · model-written summary
Pigeonpea yield was optimum at 1363 kg·ha-1 under reduced tillage plus full irrigation.
- Taxon
- PigeonpeaCajanus cajane0
- Treatment
- RT + I3e0
- Outcome
- Pigeonpea yieldse0
- Direction
- optimume0
- Value
- 1363 kg·ha-1e0
- Comparator
- ZT + I0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pigeonpea yields were optimum (1363 kg·ha-1) in RT + I3 and lowest (297 kg·ha-1) in ZT + I0”
Claim · model-written summary
Pigeonpea yield was lowest at 297 kg·ha-1 under zero tillage and rainfed conditions.
- Taxon
- PigeonpeaCajanus cajane0
- Treatment
- ZT + I0e0
- Outcome
- Pigeonpea yieldse0
- Direction
- loweste0
- Value
- 297 kg·ha-1e0
- Comparator
- RT + I3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pigeonpea yields were optimum (1363 kg·ha-1) in RT + I3 and lowest (297 kg·ha-1) in ZT + I0”
Claim · model-written summary
Average intercrop water use was 374 mm by sorghum harvest.
Not reportedDirection
Verbatim
e0“Average water use by sorghum-pigeonpea was 374 mm by sorghum harvesting and 438 mm by pigeonpea harvesting”
Claim · model-written summary
Average intercrop water use was 438 mm by pigeonpea harvest.
Not reportedDirection
Verbatim
e0“Average water use by sorghum-pigeonpea was 374 mm by sorghum harvesting and 438 mm by pigeonpea harvesting”
Claim · model-written summary
Total sorghum equivalent yield was 7475 kg·ha-1.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“producing total sorghum equivalent yield of 7475 kg·ha-1”
Claim · model-written summary
Average water use efficiency rose from 12.6 to 17.1 kg·ha-1·mm-1 between sorghum and pigeonpea harvests.
Verbatim
e0“This raised average water use efficiency from 12.6 kg·ha-1·mm-1 at sorghum harvesting to 17.1 kg·ha-1·mm-1 at pigeonpea harvesting”
t0“Sorghum-Pigeonpea Intercrop”
Claim · model-written summary
Benefit doubled at 50% of full irrigation.
Not reportedComparator
Verbatim
e0“Benefit was doubled at 50% of full irrigation and >4 times at 75% of full irrigation”
t0“Sorghum-Pigeonpea Intercrop”
Claim · model-written summary
Benefit exceeded four times at 75% of full irrigation.
Not reportedComparator
Verbatim
e0“Benefit was doubled at 50% of full irrigation and >4 times at 75% of full irrigation”
t0“Sorghum-Pigeonpea Intercrop”
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See all 25 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.