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Estimating conservation tillage residue using aerial photography

WHITING, M. L ; DEGLORIA, S. D ; BENSON, A. S ; WALL, S. L

Journal of soil and water conservation, 1987-03, Vol.42 (2), p.130-132 [Periódico revisado por pares]

Ankeny, IA: Soil and Water Conservation Society

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Título:
Estimating conservation tillage residue using aerial photography
Autor: WHITING, M. L ; DEGLORIA, S. D ; BENSON, A. S ; WALL, S. L
Assuntos: Agronomy. Soil science and plant productions ; Biological and medical sciences ; california ; californie ; cero labranza ; conservacion de aguas ; conservacion de suelos ; conservation de l' eau ; conservation des sols ; crop residues ; Cropping systems. Cultivation. Soil tillage ; fotografia ; fotointerpretacion ; Fundamental and applied biological sciences. Psychology ; General agronomy. Plant production ; monitoring ; non travail du sol ; paille ; paja ; photographie ; photography ; photointerpretation ; residu de recolte ; residuos de cosechas ; soil conservation ; Soil erosion, conservation, land management and development ; Soil science ; straw ; surveillance ; Tillage. Tending. Growth control ; vigilancia ; water conservation ; zero tillage
É parte de: Journal of soil and water conservation, 1987-03, Vol.42 (2), p.130-132
Notas: F
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Descrição: A new, inexpensive aerial photointerpretation technique for estimating the percentage of grain straw residue cover on field surfaces uses low-altitude, large-scale, small-format photography in conjunction with 35mm projectors and a modified light table. The 35mm reference and test frames represent subareas of fall-planted fields, which vary in previous year's residue cover, soil color, and soil texture. Ground data collected include line transects for estimating the cover percentage. Two film types, natural color and colorinfrared, were acquired in 70mm film at two scales (1:4,000 and 1:12,000), then reframed in 35mm mounts for independent testing by interpreters with varying experience. Based on four residue cover classes, the 1:12,000-scale, color-infrared photographs, with an average correct value of 70.7%, were significantly better (P = 0.05) than the other film types and scales. Based on two residue cover classes (<30 percent, â¥ 30 percent), the 1:12,000-scale, color-infrared photos again produced the highest overall correct value (91%), but the value was not significantly different from the 1:12,000 color (88.3%) or the 1:4,000 color-infrared (88.3%) photos. This method of estimating straw residue cover percentage shows promise in monitoring conservation tillage and soil exposed to rainfall erosion. The method could also substantially reduce the field time needed to ensure compliance of agricultural conservation practices in U.S. Department of Agriculture cost-sharing programs.
Editor: Ankeny, IA: Soil and Water Conservation Society
Idioma: Inglês

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Estimating conservation tillage residue using aerial photography

WHITING, M. L ; DEGLORIA, S. D ; BENSON, A. S ; WALL, S. L

Ankeny, IA: Soil and Water Conservation Society

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