The world has quietly transitioned into a situation where water, not land, has emerged as the principal constraint on expanding food supplies.
The value of the espionage is difficult to quantify, as the principal constraint on the Soviet atomic bomb project was a shortage of uranium ore.
The principal constraint on any reform is that the mortgage interest deduction is very popular, according to every poll on the subject.
The principal constraint on the concept is the stringent requirements on beam quality.
The principal constraint is use of the "Soyuz-Fregat" rather than the "Proton" launcher to accomplish these challenging goals.
The principal constraint of that determination is the building indoor temperature range to be no more than 2 °C.
The principal constraint for the user would be the lack of support for older browsers – in particular, IE8 which makes the data inaccessible to Windows XP users.
However, the principal constraint of these extension approaches is their limited scope: they are difficult to replicate on a wide scale in the absence of local support organizations (Farrington and others 2002).
In order to define the capacity constraints, let us now identify the principal constraints and describe them in terms of the resource limited, factors, specific conditions and consequences.
Lack of adequate nutrient supply and poor soil structure are the principal constraints to crop production under low input agriculture systems of West Africa.
