RESPONSE OF SELECTED SOIL PHYSICAL AND HYDROLOGIC PROPERTIES TO MANURE AMENDMENT RATES, LEVELS, ANDTYPES

• DOI: 10.1097/ss.0b013e318182b063
• Publication Date: 2008-08-13T07:06:47Z
• Authors: Ali Fares; Farhat Abbas; Amjad Ahmad; Jonathan L. Deenik; Mohammad Safeeq
• Keywords: Infiltrometer; Amendment; Infiltration (HVAC); Soil conditioner

Manure amendments affect several soil physical and hydrologic properties. The objectives of this study were to evaluate the effect (i) manure amendment rates (0, 168, 336, 672 kg total N ha−1), levels (one-time application, two-time application), types (chicken [CM], dairy [DM], swine [SM]) on bulk density (ρb), porosity (θt), saturated hydraulic conductivity (Ksat) a highly weathered tropical (Waialua gravely clay variant, isohyperthermic Pachic Haplustolls) (ii) measuring instruments (tension infiltrometer [TI] double-ring infiltrometers [DR]) Ksat. For application level, all plots received additional compensate for amounts decomposed during first growing season. field was tilled top 15-cm depth before after two seasons. Measurements ρb θt conducted undisturbed core samples collected from 10 cm cultivated with sweet corn (Zea mays L. subsp. mays) irrigated drip irrigation system consecutive Saturated calculated steady state infiltration measured TI DR. Results show that increased significantly (P < 0.01) decreased consequently θt. values Ksat increase in CM DM levels. SM treatments, levels; these results concur those reported literature liquid manures. DR data slightly greater than treatments. Opposite found However, good agreement (R2 = 0.90) observed between across We conclude may also temporarily improve aggregation; however, result Thus, it is not recommended slurry be applied soils low because could further inhibit water surface runoff erosion.