Variation in yield between two similar sandy loam soils. I. Description of soils and measurement of yield differences

Costigan, P. A.; Greenwood, D. J.; McBurney, T.

doi:10.1111/j.1365-2389.1983.tb01059.x

Cited by 19 publications

(4 citation statements)

References 17 publications

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“…These three experiments demonstrate that it was the lack of nutrients that was invariably associated with reduced growth on Big Ground and that the lower nutrient concentrations in the plants grown on Big Ground (Costigan et al, 1983) indicated an actual deficiency of nutrients within the plants. This was in spite of the fact that the levels of broadcast fertilizer applied in the experiments were those known to produce optimum growth on Big Ground soil.…”

Section: Discussionmentioning

confidence: 94%

“…The broadcast fertilizer was incorporated into the seedbed at a rate of 190 kg ha-* N, 90 kg ha-' P and 180 kg ha-' K on both sites. This rate of fertilizer is sufficient to produce near maximum yield on Big Ground soil (Costigan et al, 1983). When banded fertilizer was applied it consisted of triple superphosphate supplying 90 kg ha-P and potassum nitrate supplying 100 kg ha-I K and 36 kg ha-'N.…”

Section: Methodsmentioning

confidence: 99%

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Variation in yield between two similar sandy loam soils. II. Causes of yield variation in cabbage and lettuce crops

Costigan¹,

McBurney²

1983

Journal of Soil Science

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Three experiments were conducted to discover the causes of difference in yields of cabbage and lettuce when grown on two similar sandy loam soils.In a glasshouse experiment the growth of lettuce was the same on both soils provided the soil was moist and had sufficient thoroughly incorporated fertilizer. Sowing the seeds of cabbage in small pockets of compost in the seedbed increased growth on both sites by about 25%. Placement of a large amount of extra fertilizer about 10 cm below the drill line imporved growth on the poor site only.A third experiment followed the development of the yield difference in a lettuce crop. An 86% difference in potassium concentration was recorded even before emergence. This was followed by a reduction in lateral root growth on the poor site and subsequently by a lower relative growth rate from emergence until about 40 days from sowing.In conclusion, the growth on the poor site was limited because the amount of native soil potassium was hadequate for the needs of the developing seedlings and the fertilizer granules could supply potassium to only a small proportion of seedlings.

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Section: Discussionmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 99%

Variation in yield between two similar sandy loam soils. II. Causes of yield variation in cabbage and lettuce crops

Costigan¹,

McBurney²

1983

Journal of Soil Science

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“…One site (Big Ground, BG) had been under cultivation for approximately 10 years Longer than the other site (Plum Orchard, PO). These soils had similar chemical properties and clay mineralogies (Costigan et al, 1983). Samples of loamy sands were also taken from two sites at the Forestry Commission's Newton Nursery, near Elgin.…”

Section: A T E R I a L S A N D M E T H O D Smentioning

confidence: 99%

Factors affecting the strength of undisturbed cores from soils with low structural stability

Young

Mullins

1991

Journal of Soil Science

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Undisturbed core samples of two similar sandy clay loam soils (Big Ground and Plum Orchard) were equilibrated at matric potentials of -0.01, -0.1 and -1 MPa and tested for indirect tensile strength (ITS) and unconfined compressive strength (UCS). Rate of deformation was found to have significant and large effects on the measured ITS and UCS. In general, both ITS and UCS increased with increasing deformation rates although, particularly for UCS tests, the effect was variable. For ITS, the effect of rate of deformation was attributed to water having insufficient time to move towards any incipient failure plane. For UCS, the effect of rate of deformation was partly attributed to loss of moisture during loading, since samples strained at lower deformation rates generally had lower moisture contents; and partly to the different modes of failure seen. ITS and UCS of Big Ground were invariably higher than those of Plum Orchard at all matric potentials. This was attributed to Big Ground having been under an intensive management system for approximately 10 years longer than Plum Orchard.Simple pretreatment effects are also considered. In a comparison of measured and theoretically predicted ITS and UCS, theory provided good estimates of measured strengths of samples equilibrated at -0.1 MPa, although samples were considerably weaker than theoretically predicted at -1 MPa.

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“…However, a generalization based on soil profile properties cannot be specific enough to predict soil conditions using taxonomic classes. For example, Costigan et al (1983) [39] observed significant differences in crop yield between plots of the same soil series. The findings of this study stressed on inadequate potassium in a particular research plot.…”

Section: Introductionmentioning

confidence: 99%

An Assessment of Soil Variability along a Toposequence in the Tropical Moist Semi-Deciduous Forest of Ghana

Awoonor¹,

Dogbey²

2021

OJSS

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Understanding the variability of physico-chemical properties of soil along a toposequence is essential for smallholder farming communities. However, these resource constraint farmers in Ghana's Moist Semi-Deciduous Forest (MSDF) zone poorly understand how slope positions affect soil properties. Therefore, soil variability assessment along a toposequence was carried out on Bekwai-Nzima/Oda compound association. From the summit to valley bottom slope positions, soil samples were taken at two depths (0 -20 and 20 -50 cm). As shown by the coefficient of variation, topsoil (0 -20 cm) had the highest variation compared to the subsoil (20 -50 cm). The variations observed in most soil attributes (clay, silt, pH, CEC, SOC and TN) for the 0 to 20 and 20 to 50 cm depths were between eroded (summit and upper slopes) and depositional (lower slope and valley bottom) zones. The highly variable soil attributes were silt, TN, Av. P, and Av. K. However, bulk density and sand were the least variable irrespective of soil depth or toposequence. Pearson correlation analysis indicated a significant correlation (p < 0.05) between most soil attributes at the 0 -20 and 20 -50 cm depths at different slope positions. Principal component (PC) analysis indicated that the first four PCs explained more than 80% and 70% of the total variation for the 0 -20 and 20 -50 cm soil depths, respectively. Statistically, our results revealed a significant effect of slope position on soil properties (p < 0.05) and topography influenced soil characteristics and development. Soil pH, sand, silt and clay contents were less affected by slope gradient, which confirms the inherent nature of these highly weathered tropical soils. The findings of this study can serve as a reference for the formulation of soil management strategies for smallholder farm communities.

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Variation in yield between two similar sandy loam soils. I. Description of soils and measurement of yield differences

Cited by 19 publications

References 17 publications

Variation in yield between two similar sandy loam soils. II. Causes of yield variation in cabbage and lettuce crops

Variation in yield between two similar sandy loam soils. II. Causes of yield variation in cabbage and lettuce crops

Factors affecting the strength of undisturbed cores from soils with low structural stability

An Assessment of Soil Variability along a Toposequence in the Tropical Moist Semi-Deciduous Forest of Ghana

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