Let's make our own glossary.
Whenever we find a word or term we aren't familiar with, let's record it here with the definition that Toensmeier gives.
Agroecological Intensification: ?
Carbon sequestration (p21): involves removing excess carbon dioxide from the atmosphere and storing it in soil organic matter and in the aboveground biomass of long-lived plants and trees"
the science of agroecology ... is defined as “the application of ecological concepts and principles to the design and management of sustainable food systems.” (my emphasis)
He goes on to explain this this must be socially sustainable (i.e. not exploitative) as well as environmentally sustainable.
Gliessman's book is very close to the top of my "to review" pile.
Net primary productivity (NPP)
is defined as the net flux of carbon from the atmosphere into green plants per unit time. NPP refers to a rate process, i.e., the amount of vegetable matter produced (net primary production) per day, week, or year.
(also known as "agricultural output") refers to both the measure of the yield of a crop per unit area of land cultivation, and the seed generation of the plant itself (e.g. if three grains are harvested for each grain seeded, the resulting yield is 1:3).
I'll be using the term "yield" mostly in the first sense. If I find myself needing to use the latter, I will say so.
The Yield is one subset of NPP.
The concept of a yield in permaculture is broader, and ill-defined, so if I use the term in this sense I will endeavour to be clear about what I'm talking about.