scholarly journals The influence of modified pratotechnics of unmanaged grasslands on the amount of mineral nitrogen in lysimetric waters of the rhizosphere

2011 ◽  
Vol 52 (No. 2) ◽  
pp. 83-87
Author(s):  
J. Fiala
Keyword(s):  
Nitrogen Content ◽  
Sea Level ◽  
Field Trials ◽  
Mineral Nitrogen ◽  
Average Amount ◽  
Lysimetric Waters

In 2001&ndash;2004, the influence of various ways of farming unmanaged grasslands on the mineral nitrogen content in lysimetric waters was monitored. Field trials with 11 variants were performed 420 m above sea level, at depths of 0.2 and 0.4 m, 4&ndash;5 times annually. The average amount of N<sub>min</sub> released per ha per year in lysimetric waters ranged from 0.84 to 5.12 kg. The upper layer to a depth of 0.2 m had a higher content. The conclusive difference, in comparison with properly farmed control, was with the black fallow and in the variant where fallow followed mulching. With the exception of this method of farming the pratotechnics of unmanaged grasslands &ndash; mulching did not increase the load of rhisosphere, either by the overall mineral nitrogen, or by the concentration of N-NO<sub>3</sub><sup>&ndash;</sup>. Even by using fallow for a four-year period, a conclusive increase in the content of N<sub>min</sub> was not observed.

scholarly journals Calcium nitrate and ammonium nitrate limestone as sources of nitrogen for oats and barley

1961 ◽  
Vol 33 (1) ◽  
pp. 159-168
Author(s):  
Pentti Hänninen ◽  
Armi Kaila
Keyword(s):  
Ammonium Nitrate ◽  
Nitrogen Content ◽  
Calcium Nitrate ◽  
Field Trials ◽  
The Other ◽  
Nitrogen Fertilizers ◽  
Malting Barley ◽  
Growing Period ◽  
Significant Difference ◽  
Cent Level

Calcium nitrate and ammonium nitrate limestone (»Oulunsalpietari») were compared as the nitrogen fertilizer for oats in 15 field trials and for barley in one trial. The trials were carried out in summers 1959 and 1960 in various places in Finland. The split plot technique was employed in order to reduce the variation as much as possible. In 1959 the amounts of nitrogen applied as these two fertilizers to the corresponding halves of the plots were 25 and 50 kg/ha. In 1960 also higher applications were used: 75 and 100 kg/ha of N. In three trials these fertilizers were compared both as a surface dressing and worked in. Visual observations suggested about 5—6 weeks after sowing a darker green colour in the stands treated with calcium nitrate as compared with the other half treated with ammonium nitrate limestone. These differences later disappeared. In some trials a higher nitrogen content of the plants from the calcium nitrate stands could be demonstrated during this period. The uptake of nitrogen by plants was regularly followed throughout the growing period. Owing to the large variation, usually, no statistically significant difference between the effect of the fertilizers could be detected. In a few cases the superiority of calcium nitrate could be demonstrated. No differences in the ripening could be found. In most trials there was a fairly regular tendency to higher yields and higher nitrogen content in the grain and straw produced by calcium nitrate. Yet, only in a few cases were the differences statistically significant at the five per cent level. Thus, it was concluded that on the basis of the results of these trials ammonium nitrate limestone and calcium nitrate may be considered practically equal as nitrogen fertilizers for oats. There was no difference in the yields of barley produced by these two fertilizers, but the nitrogen content of grains was significantly lower with ammonium nitrate limestone than with calcium nitrate. This may be worth further study in connection with the production of malting barley.

Effect of Fertilizer, Inoculation and Sowing Time on Free Amino Acids and Mineral Nitrogen Content of Field Grown Mature Soybean Seeds

2002 ◽  
Vol 2 (1) ◽  
pp. 132-138 ◽  
Author(s):  
Abdul Kabir Khan Achakzai ◽  
Safdar Ali Kayani . ◽  
Muhammad Yaqoob . ◽  
Abdul Nabi .
Keyword(s):  
Amino Acids ◽  
Nitrogen Content ◽  
Free Amino Acids ◽  
Free Amino ◽  
Mineral Nitrogen ◽  
Soybean Seeds ◽  
Sowing Time

Stimulated decomposition of soil organic matter during the decomposition of added organic materials

1960 ◽  
Vol 11 (3) ◽  
pp. 331 ◽  
Author(s):  
NJ Barrow
Keyword(s):  
Carbon Dioxide ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Nitrogen Content ◽  
Organic Materials ◽  
Mineral Nitrogen ◽  
High Nitrogen Content ◽  
High Nitrogen ◽  
High Ph

When organic materials of high nitrogen content were allowed to decompose in soil, the accumulation of ammonium caused high pH. It vas shown that high pH caused increased production of carbon dioxide, sulphate, and mineral nitrogen from soil organic matter.

Effect of lupin management on the yield of subsequent wheat crops in a lupin-wheat rotation

1985 ◽  
Vol 25 (3) ◽  
pp. 603 ◽  
Author(s):  
A Petch ◽  
RW Smith
Keyword(s):  
Grain Yield ◽  
Nitrogen Content ◽  
Western Australia ◽  
Treatment Effects ◽  
Nitrogen Availability ◽  
Mineral Nitrogen ◽  
Control Treatment ◽  
Soil Nitrate ◽  
Soil Mineral ◽  
Soil Mineral Nitrogen

Wheat was grown in a series of 1:1 rotation cycles with sweet lupins over 8 years on three sites in Western Australia. Grain yield of wheat was the main test used to compare five lupin management treatments with a control treatment, 'no-lupins'. The lupins were cut as for silage, cut as for hay, or harvested as mature grain, the stubble being burnt or removed in summer, or turned into the soil the next autumn. Nitrogen taken up in the lupins and in the wheat was measured, as well as soil mineral nitrogen in the top 10 cm in the final year. Lupin yield and nitrogen content within any year were similar over all treatments. As much nitrogen was removed in hay and silage as in mature lupins, but wheat yielded most grain after the 'silage' and 'hay' treatments, and least after 'no-lupins' or after the 'remove' and 'turn-in' stubble treatments. Nitrogen uptakes in young wheat plants point to treatment effects due to differences in nitrogen availability, but the treatments also caused different weed populations which at least partially affected wheat yields. Herbicide control of encroaching weeds in the lupins raised soil nitrate levels the following summer and increased subsequent wheat yields.

scholarly journals Cattle Horn Shavings: A Possible Nitrogen Source for Apple Trees

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 540
Author(s):  
Juozas Lanauskas ◽  
Nobertas Uselis ◽  
Loreta Buskienė ◽  
Romas Mažeika ◽  
Gediminas Staugaitis ◽  
...  
Keyword(s):  
Ammonium Nitrate ◽  
Nitrogen Content ◽  
Nitrogen Nutrition ◽  
Agricultural Waste ◽  
Leaf Nitrogen ◽  
Mineral Nitrogen ◽  
Research Centre ◽  
Leaf Nitrogen Content ◽  
Apple Trees ◽  
Orchard Soil

The circular economy concept promotes the recycling of agricultural waste. This study was aimed at investigating the effects of cattle horn shavings on apple tree nitrogen nutrition. Ligol apple trees on P 60 rootstock were the object of the study. The experiment was conducted in the experimental orchard of the Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, from 2015 to 2018. Two fertiliser rates were tested: 50 and 100 kg/ha N. Horn shavings (14.1% N) were applied at the end of autumn or at the beginning of vegetation in the spring and in one treatment 100 kg/ha N rate was divided into two equal parts and applied both in autumn and spring. The effects of the horn shavings were compared with the effects of ammonium nitrate (34.4% N) and the unfertilised treatment. The lowest mineral nitrogen content was found in the unfertilised orchard soil and the soil fertilised with horn shavings in the spring at 50 kg/ha N equivalent. In all other cases, the fertilisers increased the soil’s mineral nitrogen content. The lowest leaf nitrogen content was found in apple trees that grew in the unfertilised orchard soil or soil fertilised in the spring with 50 kg/ha N of horn shavings (1.58–2.13%). In other cases, leaf nitrogen content was higher (1.77–2.17%). The apple trees with the lowest leaf nitrogen content produced the smallest average yield (34.5–36.6 t/ha). The highest yield was recorded from fruit trees fertilised with 50 kg/ha N of ammonium nitrate applied in spring or horn shavings applied in autumn (42.4 and 41.4 t/ha, respectively). The influence of horn shavings on the other studied parameters was similar to that of ammonium nitrate. Horn shavings, like nitrogen fertiliser, could facilitate nitrogen nutrition management in apple trees, especially in organic orchards, where the use of synthetic fertilisers is prohibited.

Effect of distance and depth on microbial biomass and mineral nitrogen content under Acacia senegal (L.) Willd. trees

2012 ◽  
Vol 95 ◽  
pp. S260-S264 ◽  
Author(s):  
Dioumacor Fall ◽  
Diegane Diouf ◽  
Alzouma Mayaki Zoubeirou ◽  
Niokhor Bakhoum ◽  
Aliou Faye ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Nitrogen Content ◽  
Mineral Nitrogen ◽  
Acacia Senegal

scholarly journals Observations on the effect of organic materila upon aggregation and nitrate-nitrogen content of soil

1952 ◽  
Vol 24 (3) ◽  
pp. 127-134
Author(s):  
Armi Kaila ◽  
Pertti Kivinen
Keyword(s):  
Nitrogen Content ◽  
Soil Nitrogen ◽  
Nitrate Nitrogen ◽  
Soil Samples ◽  
Mineral Nitrogen ◽  
Aggregation State ◽  
Water Stable Aggregates ◽  
Mineral Soils ◽  
Simultaneous Immobilization ◽  
Properties Of Soil

In the experiments reported above the effect of organic material upon the aggregation of soil particles and the simultaneous immobilization of mineral nitrogen by microorganisms were studied. The relative amount of water-stable aggregates larger than 0.5 mm in diameter was considered to indicate the aggregation state of the soil samples. Probably, somewhat different results were obtained if the crumb formation had been determined by some other method, but it is not sure that these would have been more reliable. Since the incubation of soil samples were performed under aerobic conditions, and all the samples were mineral soils, it seemed justifiable to take the nitrate-nitrogen content of the soil samples to characterize the amount of mineral nitrogen in them. On the basis of the results the general conclusion may be drawn that the more favourable the conditions are for the development of an active and large microflora in the soil, the more intensively the crumb formation and the immobilization of nitrogen takes place, but also the destruction of aggregates begins the more rapidlv. This appeared to be true with regard to the indigenous fertility of soil as well as to the fertilization. Liming, however, did not improve the conditions in these experiment, probably due to the rather slight acidity of the soil samples used. Under otherwise similar conditions the larger amount of straw produced larger amount of aggregates, but the differences in the nitrate-nitrogen content of soil in the presence of various amounts of straw were neglibigle. Generally, the degree of immobilization of soil nitrogen seemed largely to depend on the properties of soil and on other environmental conditions, and nitrogen applications, theoretically enough for the needs of microorganisms that decomposed the straw, could not always prevent an intensive absorption of soil nitrogen. The crumb formation appeared to need mere energy-yielding material than the immobilization of nitrogen, or the destruction of crumbs occurred more rapidly than the nitrification of microbiologically bound nitrogen.

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