Soil Fertility Under Continuous Cultivation in Northern Nigeria. II. Responses to Fertilizers in the Absence of Organic Manures

1970 ◽  
Vol 6 (4) ◽  
pp. 345-350 ◽  
Author(s):  
R. G. Heathcote ◽  
K. R. Stockinger
Keyword(s):  
Trace Elements ◽  
Soil Fertility ◽  
Soil Acidity ◽  
Continuous Cultivation ◽  
Northern Nigeria ◽  
Nitrogen And Phosphorus ◽  
Organic Manures ◽  
Initial Results

SUMMARYInitial results of long-term trials in northern Nigeria indicate that deficiencies of potassium and trace elements, and soil acidity, may become important under continuous cultivation on some soils, in addition to the more common deficiencies of nitrogen and phosphorus.

Soil Fertility under Continuous Cultivation in Northern Nigeria

1970 ◽  
Vol 6 (3) ◽  
pp. 229-237 ◽  
Author(s):  
R. G. Heathcote
Keyword(s):  
Soil Fertility ◽  
Soil Acidity ◽  
Continuous Cultivation ◽  
Potassium Deficiency ◽  
Limiting Factors ◽  
Northern Nigeria ◽  
Organic Manures ◽  
Sudan Savanna ◽  
Savanna Zone

SUMMARYSoil acidity, incipient potassium deficiency, and a deficiency of one or more trace elements were limiting factors in three trials of long-term soil fertility changes under continuous cultivation in the Sudan Savanna zone of Nigeria. The effectiveness of organic manures is explained largely or wholly in terms of these factors, since no evidence has yet been found to suggest that the addition of organic matter as such is of value.

SUSTAINABLE MAIZE PRODUCTION USING GLIRICIDIA/MAIZE INTERCROPPING IN SOUTHERN MALAWI

2006 ◽  
Vol 42 (4) ◽  
pp. 441-457 ◽  
Author(s):  
F. K. AKINNIFESI ◽  
W. MAKUMBA ◽  
F. R. KWESIGA
Keyword(s):  
Soil Fertility ◽  
Cropping Systems ◽  
Continuous Cultivation ◽  
Maize Yield ◽  
Fertilizer Application ◽  
Maize Production ◽  
Soil Fertility Replenishment ◽  
P Fertilizer ◽  
Maize Yields

Maize production in Malawi is limited by high costs and sub-optimal use of chemical fertilizers under continuous cultivation. A long-term gliricidia/maize trial was undertaken on a Ferric Lixisol from 1991/92 to 2001/02. The purpose of the study was to assess the performance of a gliricidia/maize intercropping system as a low-input soil fertility replenishment option in southern Malawi. The experiment was a 2 × 3 × 3 factorial design with three replications. Treatments included two maize cropping systems (with and without gliricidia trees), and three rates of inorganic N fertilizer (0, 24 and 48 N kg ha−1 representing 0, 25 and 50% of the national recommended N rate), and three rates of P fertilizer application (0, 20 and 40 P ha−1 representing 0, 50 and 100% of the recommended rate). No effect of P was detected on yield early in the trial, and this treatment was discontinued. The gliricidia pruning biomass did not decline after 10 years of intensive pruning, with strong correlation between tree biomass production and years after establishment (r = 0.91, p < 0.001). Application of gliricidia prunings increased maize yields by three times compared to the yield of unfertilized sole maize. Maize yield from the unfertilized gliricidia pruning treatment was superior to the yield from sole maize supplemented with a quarter or half the recommended N rate. The study confirmed that a gliricidia/maize intercropping system is a promising soil fertility replenishment option in southern Malawi and elsewhere in southern Africa.

Initial results from a long-term, multi-site field study of the effects on soil fertility and microbial activity of sludge cakes containing heavy metals

2006 ◽  
Vol 22 (1) ◽  
pp. 11-21 ◽  
Author(s):  
P. A. Gibbs ◽  
B. J. Chambers ◽  
A. M. Chaudri ◽  
S. P. McGrath ◽  
C. H. Carlton-Smith ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Soil Fertility ◽  
Field Study ◽  
Microbial Activity ◽  
Site Field ◽  
Initial Results

scholarly journals The use of natural resources and reproduction of soil fertility in obtaining a given quantity of products

2021 ◽  
Vol 32 ◽  
pp. 02006
Author(s):  
Alexander Akimenko ◽  
Nina Masyutenko ◽  
Tatiana Dudkina
Keyword(s):  
Natural Resources ◽  
Soil Fertility ◽  
Crop Rotation ◽  
Energy Content ◽  
Crop Rotations ◽  
Mineral Fertilizers ◽  
Nitrogen And Phosphorus ◽  
Fertilizer Nitrogen ◽  
Energy Flows

The purpose of the study is to determine the suitability for making sound decisions on the reproduction of soil fertility of the following quantitative laws of the methodology for managing material and energy flows in crop rotations: the energy content of 1 ton of humus (in GJ) is equal to half the nitrogen contained in it (in kg); the amount of exchangeable energy (in GJ) in 100 kg of phytomass is equal to the halfsum (in kg) of nitrogen and phosphorus pentoxide (about 2/3 of it falls on nitrogen). The approbation was carried out on the data of long-term stationary experiment. The results are as follows: with an increase in the level of fertilizer, nitrogen removal with the yield increased by 30–40%, and that of phosphorus by 6–12%; due to doubling the manure rate and the use of mineral fertilizers, the phosphorus balance became positive, and the nitrogen one remained negative, but improved by 17–28% depending on the type of a crop rotation. The deviation of the calculated balance of the exchangeable energy from the actual one on the poorly and most richly fertilized backgrounds was -5.5 to -11.9% and 3.0 to 8.6%., respectively.

FERTILIZATION SYSTEM AS A WAY OF SOIL FERTILITY AND STABILIZATION OF FIELD CROP ROTATION PRODUCTIVENESS

1970 ◽  
pp. 38-41
Author(s):  
V. T. Sinegovskaya ◽  
E. T. Naumchenko
Keyword(s):  
Soil Fertility ◽  
Crop Rotation ◽  
C:N Ratio ◽  
Mineral Fertilizer ◽  
Organic Fertilizers ◽  
Nitrogen And Phosphorus ◽  
Rotation System ◽  
Mobile Phosphorus ◽  
Crop Rotation System ◽  
Fertilizer System

The article presents the results of comparative evaluation of the efficiency of the long-term application of mineral and organic fertilizers in the crop rotation system. It was found that the application of the mineral fertilizer system increased the value of hydrolytic acidity of the soil from 4,30 to 5,29 mg-eq per 100 g of soil, the indicator of metabolic acidity decreased from 5,2 to 4,9 pH units. By the end of the 11th rotation for both fertilizer systems, the content of mobile phosphorus increased by more than 4 times relative to the initial value, its mobility indicator – by 2,2-3,2 times compared with the control. The use of the organo-mineral system was accompanied by an increase in the content of humus by 0,35 % and a decrease in the C:N ratio from 11,2 to 8,9. The increased productivity of wheat was revealed when applying nitrogen and nitrogen-phosphorus fertilizers against the background of prolonged use of the mineral and organo-mineral fertilizer system. The change in wheat productivity by 56 % depended on the content of mineral nitrogen, mobile phosphorus, humus in the topsoil, and on the phosphate ion mobility. Soybean productivity depended on soil fertility indicators only by 24 %: the relationship between soybean productivity and the mineral forms of nitrogen and phosphorus is weak and direct, between productivity and P2O5 mobility - weak and inverse, with humus - moderate and direct.

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