Long-Term Effects of Profile-Modifying Deep Plowing on Soil Properties and Crop Yield

2008 ◽  
Vol 72 (3) ◽  
pp. 677-682 ◽  
Author(s):  
R. L. Baumhardt ◽  
O. R. Jones ◽  
R. C. Schwartz
Keyword(s):  
Soil Properties ◽  
Crop Yield ◽  
Long Term Effects ◽  
Deep Plowing

LONG-TERM EFFECT OF DEEP PLOWING SOLONETZIC SOIL ON CHEMICAL CHARACTERISTICS AND CROP YIELD

1990 ◽  
Vol 70 (4) ◽  
pp. 565-570 ◽  
Author(s):  
D. W. McANDREW ◽  
S. S. MALHI
Keyword(s):  
Crop Yield ◽  
Crop Yields ◽  
Chemical Properties ◽  
Soil Chemical Properties ◽  
Long Term Effects ◽  
Long Term Effect ◽  
Solonetzic Soil ◽  
Ap Horizon ◽  
Deep Plowing

Deep plowing (DP) has been investigated as a possible ameliorative procedure for Solonetzic soils, but the long-term effects of DP on soil properties are not known. Soil sampling to determine the long-lasting effects of DP on some soil chemical properties and crop yields was conducted at four sites with Solonetzic soils in east-central Alberta. The soils had been deep plowed 11–29 yr prior to sampling. Compared to adjacent unplowed (check) treatments, DP resulted in significant improvements in soil chemical properties at most of the sites. The sodium adsorption ratio (SAR) of the AB horizon (12- or 15- to 30-cm depth) was lower after DP at all four sites. Extractable and soluble Ca increased in the Ap horizon (0–12 cm) of DP soils, whereas extractable Na decreased in the Ap or AB horizons at three sites. The pH of the Ap horizon increased from acidic to neutral at three sites, while EC of the Ap horizon decreased at two sites. Crop yield increased due to DP at the three sites where yields were measured. The results indicate a long-term amelioration of Solonetzic soils by DP. Key words: Amelioration, deep plowing, deep tillage, sodic soil

scholarly journals Long-Term Effects of Forest Plantation Species on Chemical Soil Properties in Southern Rwanda

Soil Systems ◽  
2021 ◽  
Vol 5 (4) ◽  
pp. 59
Author(s):  
Peter Rwibasira ◽  
Francois Xavier Naramabuye ◽  
Donat Nsabimana ◽  
Monique Carnol
Keyword(s):  
Soil Properties ◽  
Tree Species ◽  
Native Species ◽  
Water Soluble ◽  
Hot Water ◽  
Eucalyptus Species ◽  
Long Term Effects ◽  
Soil Functioning ◽  
C And N

Understanding the long-term effects of tree species on soil properties is crucial for the development of forest restoration policies in relation to the choice of species that meet both environmental and local livelihood needs. This study was performed in the Arboretum of Ruhande, Southern Rwanda, where monocultures of 148 deciduous and 56 conifer species have been established in 0.25 ha replicated plots from 1933 onwards. We investigated the effects of six exotic and two native tree species planted in monoculture plots and native species mixed within one self-regenerated plot on soil properties in two layers (0–5 cm and 5–10 cm depth). We measured general soil properties (pH, SOM, exchangeable base cations) and water-soluble C and N as a proxy for soil functioning. Changes in soil properties were observed in the upper soil layer for all tree species. Planting Eucalyptus species caused soil acidification, whereas soil exchangeable cations and pH were higher under native species (Entandrophragma excelsum and Polyschias fulva) and mixed native species. The effects of tree species were more pronounced for hot water-extractable C and N than for other soil properties. Their analyses could be used for detecting changes in soil functioning linked to vegetation types.

scholarly journals Long-term effects of fire and three firefighting chemicals on a soil - plant system

2011 ◽  
Vol 20 (7) ◽  
pp. 856 ◽  
Author(s):  
A. Couto-Vázquez ◽  
S. García-Marco ◽  
S. J. González-Prieto
Keyword(s):  
Soil Properties ◽  
Vegetation Cover ◽  
Ammonium Polyphosphate ◽  
Long Term Effects ◽  
Inorganic N ◽  
Noticeable Effect ◽  
Total N ◽  
Foaming Agent ◽  
Plant System

The effects of fire and firefighting chemicals on soil properties and the soil–plant system were evaluated 5 years after treatment application. Unburnt soils were compared with burnt soils treated with water alone (BS) or with foaming agent (BS+Fo), Firesorb polymer (BS+Fi), or ammonium polyphosphate (BS+Ap). Soils (0–2 cm depth) and foliar material (Ulex micranthus, Pterospartum tridentatum, Erica umbellata and Pinus pinaster) were analysed for total C, total N, δ15N, nutrients (soil-available; plant total), pH and inorganic-N (soils) and vegetation cover and height. No long-term effects of firefighting chemicals on soil properties were found except for pH (BS+Fo > BS+Ap), inorganic-N and P (BS+Ap > other treatments). BS+Ap plants usually showed higher values of δ15N, N, P and Na, but less K. Soil coverage by Pterospartum and Ulex was higher in BS+Ap than in other treatments, whereas the opposite was observed for Erica; shrubs were always taller in BS+Ap. After 3 years of growth, the size of pine seedlings followed the order BS+Ap > unburnt soil > other treatments. Foliar N and P, scrub regeneration and growth of pines showed the long-term fertilising effect of ammonium polyphosphate, although the second highest pine mortality was found in the BS+Ap treatment. The foaming agent did not affect vegetation cover, and Firesorb had no noticeable effect on shrubs but the highest pine mortality.

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