Abstract
A two-row hand-dropping potato planter was modified by adding fertilizer equipment. The machine was used in thirty-three experiments in 1951 and 1952 to plant potatoes from flat land and compare broadcast dressings of granulated compound fertilizer with dressings placed near to the seed. Fertilizer placed either in one band at the side and below the level of the seed, or in contact with the seed, gave consistently higher yields than broadcast dressings. Broadcast fertilizer gave yields similar to those given by only one-half to two-thirds as much placed fertilizer. On the average of all the experiments, placing fertilizer gave about 1 ton/acre more potatoes than broadcasting. The advantages of placement were greatest when low rates of dressing were used. Broadcast fertilizer was cultivated deeply into the seed-beds in nineteen experiments in 1952 and gave slightly lower average yields than late dressings broadcast on the seed-beds. Fertilizer placed in bands on the soil surface immediately in front of the seed-shoes gave yields similar to those given by dressings broadcast over the seed-beds in fourteen experiments in 1951. In average planting conditions fertilizer broadcast on the seed-beds or placed in front of the seed-shoes was thrown to the middle of the ridges and concentrated above the seed. Fertilizer placed in contact with the seed gave higher average yields than dressings in a sideband at both rates of manuring in the 1951 experiments. In 1952 contact placement was slightly superior to sideband placement at low rates of fertilizer and slightly inferior at high rates. In most experiments in each year emergence was delayed by 10–14 days when the heavy dressing was placed in contact with the seed. Early growth was poor but at most centres the crops recovered later in the season and gave good yields. There is most risk of damage from contact placement on light soils, on badly prepared seed-beds and in dry years. Dressings of 10 to 12 cwt./acre of ordinary-strength compound fertilizers are likely to be quite safe when applied in contact with the seed. If heavier dressings are to be used, part should be applied in contact with the seed and part broadcast, such split applications were satisfactory in experiments in 1951. Farmers planting even moderate acreages of potatoes by machines will benefit by using a suitable fertilizer attachment. Equipment is needed to place fertilizer at the side of the seed so that heavy dressings can be used to secure maximum yields without risk.
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Claims 20
Claim · model-written summary
Sideband placement yielded more potatoes than broadcast fertilizer.
- Taxon
- potatoes
Solanum tuberosumt0 - Treatment
- one band at the side and below the level of the seede0
- Outcome
- yieldse0
- Direction
- highere0
- Comparator
- broadcast dressingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer placed either in one band at the side and below the level of the seed, or in contact with the seed, gave consistently higher yields than broadcast dressings.”
t0“potatoes”
Claim · model-written summary
Contact placement yielded more potatoes than broadcast fertilizer.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- in contact with the seede0
- Outcome
- yieldse0
- Direction
- highere0
- Comparator
- broadcast dressingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer placed either in one band at the side and below the level of the seed, or in contact with the seed, gave consistently higher yields than broadcast dressings.”
t0“potatoes”
Claim · model-written summary
Broadcast fertilizer yielded similarly to half to two thirds as much placed fertilizer.
- Taxon
- potatoesSolanum tuberosumt0
- Outcome
- yieldse0
- Direction
- similare0
- Qualifier
- one-half to two-thirds as muche0
- Comparator
- placed fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Broadcast fertilizer gave yields similar to those given by only one-half to two-thirds as much placed fertilizer.”
t0“potatoes”
Claim · model-written summary
Placement increased potato yield by about 1 ton/acre on average versus broadcasting.
- Taxon
- potatoesSolanum tuberosume0
- Treatment
- placing fertilizere0
- Outcome
- potatoese0
- Direction
- moree0
- Value
- about 1 ton/acree0
- Comparator
- broadcastinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“placing fertilizer gave about 1 ton/acre more potatoes than broadcasting.”
Claim · model-written summary
Placement advantages were greatest at low fertilizer rates.
- Taxon
- potatoesSolanum tuberosumt0
- Outcome
- advantages of placemente0
- Direction
- greateste0
- Qualifier
- low rates of dressinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The advantages of placement were greatest when low rates of dressing were used.”
t0“potatoes”
Claim · model-written summary
Deep cultivation of broadcast fertilizer yielded slightly less than late broadcasting.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- cultivated deeply into the seed-bedse0
- Outcome
- average yieldse0
- Direction
- slightly lowere0
- Comparator
- late dressings broadcast on the seed-bedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Broadcast fertilizer was cultivated deeply into the seed-beds in nineteen experiments in 1952 and gave slightly lower average yields than late dressings broadcast on the seed-beds.”
t0“potatoes”
Claim · model-written summary
Surface-band fertilizer ahead of seed shoes yielded similarly to seedbed broadcast fertilizer.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- bands on the soil surface immediately in front of the seed-shoese0
- Outcome
- yieldse0
- Direction
- similare0
- Comparator
- dressings broadcast over the seed-bedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer placed in bands on the soil surface immediately in front of the seed-shoes gave yields similar to those given by dressings broadcast over the seed-beds”
t0“potatoes”
Claim · model-written summary
Seedbed broadcasting or placement before seed shoes concentrated fertilizer above the seed in typical planting conditions.
- Taxon
- potatoesSolanum tuberosumt0
- Outcome
- concentrated above the seede0
- Qualifier
- middle of the ridgese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fertilizer broadcast on the seed-beds or placed in front of the seed-shoes was thrown to the middle of the ridges and concentrated above the seed.”
t0“potatoes”
Claim · model-written summary
Contact placement outyielded sideband placement at both rates in 1951.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- in contact with the seede0
- Outcome
- average yieldse0
- Direction
- highere0
- Qualifier
- both rates of manuring in the 1951 experimentse0
- Comparator
- dressings in a sidebande0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer placed in contact with the seed gave higher average yields than dressings in a sideband at both rates of manuring in the 1951 experiments.”
t0“potatoes”
Claim · model-written summary
Contact placement slightly outyielded sideband placement at low fertilizer rates in 1952.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- contact placemente0
- Outcome
- slightly superiore0
- Direction
- slightly superiore0
- Qualifier
- low rates of fertilizere0
- Comparator
- sideband placemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1952 contact placement was slightly superior to sideband placement at low rates of fertilizer”
t0“potatoes”
Claim · model-written summary
Contact placement was slightly inferior to sideband placement at high rates in 1952.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- contact placemente0
- Outcome
- slightly inferiore0
- Direction
- slightly inferiore0
- Qualifier
- high ratese0
- Comparator
- sideband placemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1952 contact placement was slightly superior to sideband placement at low rates of fertilizer and slightly inferior at high rates.”
t0“potatoes”
Claim · model-written summary
Heavy contact dressing delayed potato emergence by 10–14 days in most experiments.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- heavy dressing was placed in contact with the seede0
- Outcome
- emergencee0
- Direction
- delayede0
- Value
- 10–14 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“emergence was delayed by 10–14 days when the heavy dressing was placed in contact with the seed.”
t0“potatoes”
Claim · model-written summary
Early crop growth was poor after contact placement but most crops recovered and yielded well later.
- Taxon
- potatoesSolanum tuberosumt0
- Outcome
- Early growthe0
- Direction
- poore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early growth was poor but at most centres the crops recovered later in the season and gave good yields.”
t0“potatoes”
Claim · model-written summary
Most crops recovered later and yielded well.
- Taxon
- potatoesSolanum tuberosumt0
- Outcome
- good yieldse0
- Qualifier
- at most centrese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at most centres the crops recovered later in the season and gave good yields.”
t0“potatoes”
Claim · model-written summary
Contact placement damage risk is greatest on light soils, badly prepared seedbeds and in dry years.
- Taxon
- potatoesSolanum tuberosumt0
- Outcome
- risk of damagee0
- Direction
- moste0
- Qualifier
- light soils, on badly prepared seed-beds and in dry yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There is most risk of damage from contact placement on light soils, on badly prepared seed-beds and in dry years.”
t0“potatoes”
Claim · model-written summary
The authors consider 10 to 12 cwt./acre ordinary-strength compound fertilizer safe in contact with seed.
- Taxon
- potatoesSolanum tuberosumt0
- Outcome
- Dressings of 10 to 12 cwt./acre of ordinary-strength compound fertilizerse0
- Qualifier
- likely to be quite safee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dressings of 10 to 12 cwt./acre of ordinary-strength compound fertilizers are likely to be quite safe when applied in contact with the seed.”
t0“potatoes”
Claim · model-written summary
For heavier dressings, the authors recommend splitting between seed contact and broadcasting.
- Taxon
- potatoesSolanum tuberosumt0
- Outcome
- part should be applied in contact with the seed and part broadcaste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“If heavier dressings are to be used, part should be applied in contact with the seed and part broadcast”
t0“potatoes”
Claim · model-written summary
Split applications were satisfactory in 1951 experiments.
- Taxon
- potatoesSolanum tuberosumt0
- Outcome
- split applications were satisfactorye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“such split applications were satisfactory in experiments in 1951.”
t0“potatoes”
Claim · model-written summary
The authors recommend suitable fertilizer attachments for mechanized potato planting.
- Taxon
- potatoesSolanum tuberosume0
- Outcome
- using a suitable fertilizer attachmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Farmers planting even moderate acreages of potatoes by machines will benefit by using a suitable fertilizer attachment.”
Claim · model-written summary
The authors call for equipment placing heavy fertilizer dressings beside seed to maximize yield without damage.
- Taxon
- potatoesSolanum tuberosumt0
- Outcome
- place fertilizer at the side of the seede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Equipment is needed to place fertilizer at the side of the seed so that heavy dressings can be used to secure maximum yields without risk.”
t0“potatoes”
The same questions in other papers
fertilization · organism · Solanum tuberosum (potato)Positive and negative results
16 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
15 papers more in this group
See all 19 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.