Answer:
Carbon dioxide
Explanation:
Although minerals represent a very low proportion of plant tissue, they are fundamental in CO2 capture via photosynthesis. So, even with adequate solar radiation and temperature, growth can be slow if soil nutrient availability is low. Already, if water is lacking, even if all the factors mentioned above are at optimum level, the evolution will still be low, because, in order not to lose water, the plant closes the holes of the leaf (stomata) through which CO2 should enter, because also that's where you breathe and sweat.
Understanding, then, the individual effects of the determining factors of plant growth, one can already infer how complex their joint effect is. And in pasture livestock we have yet to consider the need to maintain a constant leaf residue. Therein lies a basic rule in pasture production: to control the intensity of defoliation, that is, to vary the stocking as a function of the variation in plant growth.
