Soil Aggregation and Onion Yields

Rynasiewicz, J.

doi:10.1097/00010694-194511000-00004

Cited by 13 publications

(3 citation statements)

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“…Rynasiewicz (8) found a definite correlation between onion yields and the amount of water-stable soil aggregates. After two years of cropping with redtop the soil contained a high percentage of waterstable soil aggregates and yields of onions were correspondingly high.…”

Section: Onionsmentioning

confidence: 96%

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Further Studies on the Effect of Certain Crops on Succeeding Crops¹

Odland¹,

Smith²

1948

Agronomy Journal

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Section: Onionsmentioning

confidence: 96%

“…at four locations in Canada. The Rhode Island Station has published a number of journal articles and station bulletins (2,5,6,8) covering work conducted on the problem over a period of 35 years.…”

Section: Further Studies On the Effect Of Certain Crops On Succeedingmentioning

confidence: 99%

Further Studies on the Effect of Certain Crops on Succeeding Crops¹

Odland¹,

Smith²

1948

Agronomy Journal

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“…The dynamic character of soil physical conditions has been emphasized (2,3,9). The relationship of good physical conditions in the soil to crop yield (8, 12,13,16) and to effective control of runoff and erosion ( 10,12,15) has been pointed out. In previous reports of results from studies on controlled plots (7,12) we have shown the benefits of crop rotation and organic matter additions on soil physical conditions, control of runoff and erosion, and improvement of truck crop yields.…”

Section: Effects Of Land Resting On Conservation and Productivitymentioning

confidence: 99%

Effects of Land Resting on Conservation and Productivity of Vegetable‐growing Soils¹

Neal

1952

Agronomy Journal

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The relationship between soil structure, soil cultivation, nitrogen uptake, and crop growth. I.—A review of the literature

Singh

Pollard

1956

J Sci Food Agric

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Zakharovl defined soil structure as the nature of the fragments or clods into which the soil breaks up. The effects of cultural operations such as ploughing, cultivating, harrowing and hoeing on soil structure include the breaking up of soil into such fragments (soil aggregates) thus increasing the volume/weight and porosity. Henin2 affirmed this 'and gave a mathematical expression to such an increase. Nekrassov in 1928, 1929, Ig343-5 and Apsits in 19366 studied the effects of ploughing, cultivating, harrowing, rolling and hoeing on the capillary and noncapillary porosity of the soil (according to whether the pores are of such size that water does or does not drain under gravitational forces). They found that the major influence of tillage was on the non-capillary porosity. Doyarenko and his co-workers (Krause') have investigated the relationship of non-capillary porosity to various soil properties including aeration and nitrate formation. The oxygen content of the soil air, and nitrate formation were closely related to the non-capillary porosity, which in turn was associated with the proportion of larger aggregates in the soil. Other recent experimental results have shown rather definite relationships between non-capillary porosity and soil permeability (permeability to water under gravity), as well as the root development of crops. Saltere has specially stressed the importance of pore space in root-soil relationships. Page, Willard & McCuene studied the non-capillary porosity and compactness of soil resulting from different methods of seed-bed preparation. Ploughed plots were the most porous and mellow. Hoed and disced plots were quite compact and were the most poorly aerated. Chizhersky & Kolobovalo found that plots which had been worked with a cultivator contained 14% of aggregates smaller than 0.25 mm., while ploughed ones contained only 3%. Keen11 compared the aggregation of a soil following cultivation with a ridging plough, an ordinary plough and a rotary cultivator and found the ridging plough to be the best in this respect, a relatively small amount of disintegration of aggregates being caused by the ordinary plough. Dreibelbis & Nairls also found in the 0-4-in. layer greater pore space and better aggregation after discing than after ploughing, but in the 4-7-in. layer the relationship was reversed. Maize plants were better but thinner in the stand on disced than on the ploughed plots, but yields were not affected.Poletaefls studied the effect of tillage on soil fertility. The nitrogen nutrition of crops appeared to be related to the physical conditions of the upper soil layers at sowing time. A cloddy structure in deeper (20)(21)(22) cm.) ploughed plots caused greater leaching of nitrates in winter than did a fine structure in shallow-ploughed (12-14 cm.) plots ; mobilization of nitrates in spring was more active in the former than in the latter. Wheat grown on the shallow-ploughed plots showed signs of lack of nitrogen, but was much better on the deep-ploughed plots ; weight of grain, number of ears a...

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Soil Aggregation and Onion Yields

Cited by 13 publications

References 0 publications

Further Studies on the Effect of Certain Crops on Succeeding Crops¹

Further Studies on the Effect of Certain Crops on Succeeding Crops¹

Effects of Land Resting on Conservation and Productivity of Vegetable‐growing Soils¹

The relationship between soil structure, soil cultivation, nitrogen uptake, and crop growth. I.—A review of the literature

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Soil Aggregation and Onion Yields

Cited by 13 publications

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Further Studies on the Effect of Certain Crops on Succeeding Crops1

Further Studies on the Effect of Certain Crops on Succeeding Crops1

Effects of Land Resting on Conservation and Productivity of Vegetable‐growing Soils1

The relationship between soil structure, soil cultivation, nitrogen uptake, and crop growth. I.—A review of the literature

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Further Studies on the Effect of Certain Crops on Succeeding Crops¹

Further Studies on the Effect of Certain Crops on Succeeding Crops¹

Effects of Land Resting on Conservation and Productivity of Vegetable‐growing Soils¹