A soil mix containing kelp meal should be allowed time to break down before planting into it. Or if in no-till, it should be applied with equal parts compost. Many dry amendments will consume nitrogen in this way, not just kelp meal. So the point about it consuming nitrogen is moot if you prepare your soil correctly.
It's disingenuous to make some far fetched point about kelp meal's efficacy without being honest about using it and comparing it to something like seaweed extract, an inherently inferior product.
As for the 8% vs 14%, as mentioned seaweed extract is not comparable to kelp meal. It's not an apples to apples comparison. Break down time is irrelevant when what is breaking down doesn't deliver even half of the nutrient payload or amino acids, enzymes, pgr's, and trace minerals. If you prepare your soil correctly and time your garden's progression correctly, there is no need to rely on bottles to deliver what your soil is lacking. As it's been said before, you can't amend your way to a living soil.
Decomposition is only part of this equation. What is decomposing? What is being delivered to the soil? If we only measured amendments value in terms of how quickly they break down no one would use sands or rock dusts.
My preference of seaweed extract is "cold processed" (dried Ascophyllum nodosum seaweed treated under high pressure and cold water--no chemicals, no heat), which retains all the goodness found in seaweed...but in a bottle. Yep, all the micro-nutes, plant growth compounds, carbs, protein, vitamins and amino acids are all there--in liquid form, with the OMRI and Organic label.
Would Neptune's Harvest 0-0-1 seaweed fit this criteria?
Burn1
I readily acknowledge the benefits of both meals and extracts for their own specific purposes. In soil extracts do not compare to kelp meal. That you continue to deny this fact shows how little you actually know about soil.The organic matter and soil conditioning properties in Acadian Kelp Meal are important in maintaining fertility and productivity of agricultural soils. Organic matter in the soil, and associated soil microflora, bacteria, and fungi, play an important role in soil fertility by making nutrients available for plant uptake.
Acadian Kelp Meal acts as a soil conditioner by stimulating microbial activity, a process often disrupted by modern agricultural practices. The minerals released and humus colloids formed during the decomposition of Kelp Meal, result in the aggregation of soil particles and the retention of nutrients which might otherwise be leached from the soil.
Good soil structure provides improved aeration, water holding capacity and soil fertility, and makes soils less prone to erosion and erosive forces.