Three years of pasture management changed phosphorus recycling more clearly than conventional soil tests
WHAT THE EVIDENCE SAYS
Across a three-year experiment comparing multispecies regenerative and conventional pasture systems under two phosphorus regimes, most labile soil-P tests showed little management effect. Animal intake and dung return changed across years and treatments, and ordination was driven more by sampling date than treatment; the authors interpret a late biological signal cautiously.
WHY IT MATTERS / OUR READ
A management label can move nutrient pathways without quickly moving the soil test a manager is accustomed to reading. Nutrient cycling needs to be followed through plants, animals and microbes as well as bulk soil pools.
CAVEATS / UNCERTAINTY
This is one temperate pasture experiment and treatment differences included several management components. Some effects emerged late or inconsistently, and the authors explicitly treat the microbial signal as an early indicator rather than established treatment proof.
SOURCE
Nutrient Cycling in Agroecosystems
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In a grazed New Zealand experiment, seasonal and animal-mediated phosphorus pathways diverged while most labile soil-P measures stayed relatively insensitive to management.
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