Field Indicators of Nitrogen Mineralization

2015 ◽  
pp. 31-47 ◽  
Author(s):  
J. S. Schepers ◽  
J. J. Meisinger
Keyword(s):  
Nitrogen Mineralization ◽  
Field Indicators

Decomposition and nitrogen mineralization from green manures intercropped with coffee tree

2018 ◽  
Vol 13 (1) ◽  
pp. 23
Author(s):  
Rosileyde Golçalves Siqueira Cardoso ◽  
Adriene Woods Pedrosa ◽  
Mateus Cupertino Rodrigues ◽  
Ricardo Henrique Silva Santos ◽  
Paulo Roberto Cecon ◽  
...  
Keyword(s):  
Nitrogen Mineralization ◽  
N Mineralization ◽  
Dry Matter ◽  
Nitrogen Concentration ◽  
Growth Time ◽  
Dry Matter Content ◽  
Green Manures ◽  
Coffee Tree ◽  
Jack Bean ◽  
Hyacinth Bean

The knowledge about the rate of decomposition and nitrogen mineralization of green manures provides synchronization with the higher absorption stage by the coffee tree. The rate of decomposition and nitrogen mineralization varies according to the species of green manure and with the environmental factors. The aim of the present study was to evaluate the decomposition and nitrogen mineralization of two green manures intercropped with coffee trees for three different periods. The experiment was divided into two designs for statistical analysis, one referring to the characterization of plant material (fresh mass, dry matter, dry matter content, nitrogen concentration and accumulation in the jack bean (Canavalia ensiformis) and hyacinth bean (Dolichos lablab) and another to evaluate the rate of decomposition and N mineralization of these species. The decomposition rate decreased in both species as their growth time increased in the field. The decomposition was influenced by the phenology of green manures. Nitrogen mineralization of the jack bean decreased as the growth period in the field increased and was faster than hyacinth bean only when cut at 60 days. The N mineralization was slower than mass decomposition in both species.

DEVELOPMENT OF A LAND DEGRADATION ASSESSMENT MODEL BASED ON FIELD INDICATORS ASSESSMENT AND PREDICTION METHODS IN WAI SARI, SUB-WATERSHED KAIRATU DISTRICT, WESTERN SERAM REGENCY, MALUKU PROVINCE, INDONESIA

2019 ◽  
Vol 2 (1) ◽  
pp. 071-084
Author(s):  
Silwanus M. Talakua ◽  
Rafael M. Osok
Keyword(s):  
Land Degradation ◽  
Soil Loss ◽  
Assessment Model ◽  
Small Scale ◽  
Small Islands ◽  
Topographic Map ◽  
Field Assessment ◽  
Field Indicators ◽  
Degradation Measurement ◽  
Very High

The study was conducted in Wai Sari sub-watershed, Western Seram Regency Maluku to develop an accurate land degradation assessment model for tropical small islands. The Stocking’s field land degradation measurement and RUSLE methods were applied to estimate soil loss by erosion and the results of both methods were statistically tested in order to obtain a correction factor. Field indicators and prediction data were measured on 95 slope units derived from the topographic map. The rates of soil loss were calculated according to both methods, and the results were used to classify the degree of land degradation. The results show that the degree of land degradation based on the field assessment ranges from none-slight (4.04 - 17.565 t/ha/yr) to very high (235.44 - 404.00 t/ha/yr), while the RUSLE method ranges from none-slight (0.04-4.59 t/ha/yr) to very high 203.90 - 518.13 t/ha/yr.  However, the RUSLE method shows much higher in average soil loss (133.4 t/ha/yr) than the field assessment (33.9 t/ha/yr). The best regression equation of  logD/RP = - 0.594 + 1.0 logK + 1.0 logLS + 1.0 logC or D = 0.2547xRxKxLSx CxP was found to be a more suitable land degradation assessment  model for a small-scale catchment area in the tropical small islands.

Soil Carbon and Nitrogen Mineralization

2004 ◽  
Vol 68 (2) ◽  
pp. 489 ◽  
Author(s):  
R. L. Haney ◽  
A. J. Franzluebbers ◽  
E. B. Porter ◽  
F. M. Hons ◽  
D. A. Zuberer
Keyword(s):  
Soil Carbon ◽  
Nitrogen Mineralization ◽  
Carbon And Nitrogen ◽  
Soil Carbon And Nitrogen

Ant-mediated effects on soil nitrogen mineralization vary with species in a tropical forest

CATENA ◽  
2021 ◽  
Vol 203 ◽  
pp. 105352
Author(s):  
Qianqian Zuo ◽  
Shaojun Wang ◽  
Ping Wang ◽  
Qianbin Cao ◽  
Shuang Zhao ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Nitrogen Mineralization ◽  
Soil Nitrogen ◽  
Soil Nitrogen Mineralization ◽  
Mediated Effects

Carbon and nitrogen mineralization from light- and heavy-fraction additions to soil

2000 ◽  
Vol 32 (10) ◽  
pp. 1345-1352 ◽  
Author(s):  
Joann K. Whalen ◽  
Peter J. Bottomley ◽  
David D. Myrold
Keyword(s):  
Nitrogen Mineralization ◽  
Heavy Fraction ◽  
Carbon And Nitrogen

The effect of an acidified‐gypsum mixture on broiler litter urease‐producing bacteria and nitrogen mineralization

2021 ◽  
Author(s):  
Christopher Daniel Burt ◽  
Taylor Chapman ◽  
Dave Bachoon ◽  
Miguel L Cabrera ◽  
Christopher Horacek
Keyword(s):  
Nitrogen Mineralization ◽  
Broiler Litter
Sign in / Sign up

Export Citation Format

Share Document