"unstable yields" is correct and can be used in written English.
This phrase is used to describe the rate of return from an investment that is inconsistent or fluctuating. For example, "The pharmaceutical industry has seen unstable yields over the last few years."
The low and unstable yields of rainfed lowland rice in Central Java can be attributed to drought, nutrient stress, pest infestation or a combination of these factors.
These include (1) their low and unstable yields [16, 86]; (2) inadequate policy support [14]; (3) lack of proper quantification (and recognition) of long-term benefits of legumes within cropping systems [82].
AMVL has previously been chemically synthesized and identified as a metabolite present in the culture broths of various fungi, but the production of AMVL has been hampered by low and unstable yields.
The low diffusion of legumes' cultivation is also due to reduced and unstable yields and susceptibility to biotic and abiotic stress conditions; the average yields for unit area have increased (soybean +86%, lentil +77%, groundnut +75%, chickpea +70%) less than cereal crops (+104%, on average) (Table 1).
This is mainly because the low and unstable yields from their cashew crop does not encourage them to manage their crop using such inputs.
In 1995-1998 about 30,000 ha of cashew trees were cut down and replaced by mango and longan; also other trees in Songbe, Dongnai and Tayninh provinces due to their unstable yields and low income.
Globally, grain legumes are the most relevant source of plant protein, especially in many countries of Africa and Latin America, but there are some constraints in their production, such as a poor adaptation, pest and diseases and unstable yield.
Therefore, one consequence of common property division was low and unstable crop yields.
NT has induced some concerns in the North China Plain (NCP), e.g. unstable crop yield and fodder shortage, with regards to the amount of crop residues retained on the soil surface.
Not only are pulsed supersonic expansions occasionally unstable and yield fairly important pulse-to-pulse fluctuations, one also needs to consider differences in transmission for different source conditions.
The continuity-constraint pressure-correction algorithm yields unstable solutions if density ratios are high.
